From d83b79dd2ffda5971d02229b4d7e4503019831d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=2E=C2=A0S=2E=20Choi?= <jschoi@jschoi.org>
Date: Thu, 8 Apr 2021 00:10:11 -0400
Subject: [PATCH] Rename "smart" pipe-proposal option to "hack" See
 babel/babel#11600 and https://github.com/js-choi/proposal-hack-pipes.

---
 .../input.js                                  |  0
 .../test/fixtures/types/PipeBody/options.json |  3 ++
 .../output.js                                 |  0
 .../types/PipelineBareFunction/input.js       |  1 -
 .../types/PipelineBareFunction/options.json   |  3 --
 .../types/PipelineBareFunction/output.js      |  1 -
 .../PipelineTopicExpression/options.json      |  3 --
 packages/babel-parser/ast/spec.md             | 43 ++-----------------
 .../babel-parser/src/parser/error-message.js  | 12 +++---
 .../babel-parser/src/parser/expression.js     | 34 +++++++--------
 packages/babel-parser/src/plugin-utils.js     |  2 +-
 packages/babel-parser/src/tokenizer/state.js  |  4 +-
 .../output.json                               |  4 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              | 11 +++++
 .../input.js                                  |  0
 .../hack-proposal-async-await/options.json    |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  2 +-
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  4 ++
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  4 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  2 +-
 .../input.js                                  |  0
 .../options.json                              |  4 +-
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../input.js                                  |  0
 .../options.json                              |  3 ++
 .../output.json                               |  0
 .../invalid-proposal/options.json             |  2 +-
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  4 --
 .../smart-proposal-async-await/options.json   |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  4 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../options.json                              |  3 --
 .../babel-parser/typings/babel-parser.d.ts    |  2 +-
 .../src/{smartVisitor.js => hackVisitor.js}   |  4 +-
 .../src/index.js                              |  4 +-
 .../{smart+arrow => hack}/await/exec.js       | 11 ++---
 .../{smart+arrow => hack}/await/options.json  |  1 +
 .../fixtures/{smart => hack}/basic/exec.js    |  0
 .../test/fixtures/hack/indirect-eval/exec.js  |  4 ++
 .../fixtures/{smart => hack}/nested/exec.js   |  0
 .../{smart => hack}/object-literal/exec.js    |  4 +-
 .../test/fixtures/hack/options.json           |  6 +++
 .../fixtures/hack/topic-as-callee/input.js    |  1 +
 .../{smart => hack}/topic-as-callee/output.js |  0
 .../hack/topic-inside-arrow-function/exec.js  |  5 +++
 .../transform-arrow-functions}/exec.js        |  7 ++-
 .../transform-arrow-functions}/options.json   |  2 +-
 .../for-init/output.js => hack/while/exec.js} |  6 +--
 .../fixtures/{smart => hack}/yield/exec.js    |  2 +-
 .../test/fixtures/smart/await/input.js        |  6 ---
 .../test/fixtures/smart/await/options.json    |  7 ---
 .../test/fixtures/smart/await/output.js       |  5 ---
 .../test/fixtures/smart/bare-function/exec.js |  7 ---
 .../fixtures/smart/bare-function/input.js     |  5 ---
 .../fixtures/smart/bare-function/output.js    |  4 --
 .../test/fixtures/smart/basic/input.js        |  4 --
 .../test/fixtures/smart/basic/output.js       |  3 --
 .../test/fixtures/smart/for-init/exec.js      |  5 ---
 .../test/fixtures/smart/for-init/input.js     |  5 ---
 .../test/fixtures/smart/for-update/exec.js    |  6 ---
 .../test/fixtures/smart/for-update/input.js   |  6 ---
 .../test/fixtures/smart/for-update/output.js  |  9 ----
 .../test/fixtures/smart/for/exec.js           |  5 ---
 .../test/fixtures/smart/for/input.js          |  5 ---
 .../test/fixtures/smart/for/output.js         |  9 ----
 .../test/fixtures/smart/if/input.js           |  4 --
 .../test/fixtures/smart/if/output.js          |  3 --
 .../test/fixtures/smart/indirect-eval/exec.js |  7 ---
 .../fixtures/smart/indirect-eval/input.js     |  7 ---
 .../fixtures/smart/indirect-eval/output.js    |  8 ----
 .../test/fixtures/smart/nested/input.js       |  5 ---
 .../test/fixtures/smart/nested/output.js      |  7 ---
 .../fixtures/smart/object-literal/input.js    |  8 ----
 .../fixtures/smart/object-literal/output.js   | 10 -----
 .../test/fixtures/smart/options.json          |  6 ---
 .../fixtures/smart/topic-as-callee/input.js   |  1 -
 .../smart/topic-inside-arrow-function/exec.js |  7 ---
 .../topic-inside-arrow-function/input.js      |  5 ---
 .../topic-inside-arrow-function/output.js     |  7 ---
 .../test/fixtures/smart/while/exec.js         |  7 ---
 .../test/fixtures/smart/while/input.js        |  7 ---
 .../test/fixtures/smart/while/output.js       | 10 -----
 .../test/fixtures/smart/yield/input.js        |  5 ---
 .../test/fixtures/smart/yield/output.js       |  5 ---
 .../src/index.js                              |  2 +-
 218 files changed, 205 insertions(+), 435 deletions(-)
 rename packages/babel-generator/test/fixtures/types/{PipelineTopicExpression => PipeBody}/input.js (100%)
 create mode 100644 packages/babel-generator/test/fixtures/types/PipeBody/options.json
 rename packages/babel-generator/test/fixtures/types/{PipelineTopicExpression => PipeBody}/output.js (100%)
 delete mode 100644 packages/babel-generator/test/fixtures/types/PipelineBareFunction/input.js
 delete mode 100644 packages/babel-generator/test/fixtures/types/PipelineBareFunction/options.json
 delete mode 100644 packages/babel-generator/test/fixtures/types/PipelineBareFunction/output.js
 delete mode 100644 packages/babel-generator/test/fixtures/types/PipelineTopicExpression/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-with-topic-first => hack-proposal-addition-with-topic-first}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-with-topic-first => hack-proposal-addition-with-topic-first}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-with-topic-last => hack-proposal-addition-with-topic-last}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-with-topic-last => hack-proposal-addition-with-topic-last}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-without-topic => hack-proposal-addition-without-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-addition-without-topic => hack-proposal-addition-without-topic}/output.json (93%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-arrow-function-parenthesized => hack-proposal-arrow-function-parenthesized}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-arrow-function-parenthesized => hack-proposal-arrow-function-parenthesized}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-arrow-function-unparenthesized => hack-proposal-arrow-function-unparenthesized}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-async-await => hack-proposal-async-await}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-async-await => hack-proposal-async-await}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-computed-no-topic => hack-proposal-computed-no-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-computed-no-topic => hack-proposal-computed-no-topic}/output.json (93%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head}/input.js (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head}/options.json (56%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head => hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-else-body => hack-proposal-do-expression-with-if-statement-and-topic-in-else-body}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-else-body => hack-proposal-do-expression-with-if-statement-and-topic-in-else-body}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body => hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body => hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-if-body => hack-proposal-do-expression-with-if-statement-and-topic-in-if-body}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-if-body => hack-proposal-do-expression-with-if-statement-and-topic-in-if-body}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-if-head => hack-proposal-do-expression-with-if-statement-and-topic-in-if-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-if-statement-and-topic-in-if-head => hack-proposal-do-expression-with-if-statement-and-topic-in-if-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body => hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body => hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head => hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head => hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-topic-identity => hack-proposal-do-expression-with-topic-identity}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-topic-identity => hack-proposal-do-expression-with-topic-identity}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause => hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause => hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause => hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause => hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause => hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause => hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-while-loop-topic-in-loop-head => hack-proposal-do-expression-with-while-loop-topic-in-loop-head}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-do-expression-with-while-loop-topic-in-loop-head => hack-proposal-do-expression-with-while-loop-topic-in-loop-head}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-function-call-with-topic-in-argument => hack-proposal-function-call-with-topic-in-argument}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-function-call-with-topic-in-argument => hack-proposal-function-call-with-topic-in-argument}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-function-definition-with-topic-in-default-parameter => hack-proposal-function-definition-with-topic-in-default-parameter}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-function-definition-with-topic-in-default-parameter => hack-proposal-function-definition-with-topic-in-default-parameter}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-generator-yield => hack-proposal-generator-yield}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-generator-yield => hack-proposal-generator-yield}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-invalid-hash-token-followed-by-digit => hack-proposal-invalid-hash-token-then-digit}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-mixed-pipeline-plugins => hack-proposal-mixed-pipeline-plugins}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-mixed-pipeline-plugins => hack-proposal-mixed-pipeline-plugins}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function => hack-proposal-nested-pipelines-with-arrow-function-with-required-topics}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function => hack-proposal-nested-pipelines-with-arrow-function-with-required-topics}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic => hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic => hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic}/output.json (96%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic => hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic => hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic}/output.json (95%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines => hack-proposal-nested-pipelines-with-function-call}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines => hack-proposal-nested-pipelines-with-function-call}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-without-inner-topic => hack-proposal-nested-pipelines-without-inner-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-without-inner-topic => hack-proposal-nested-pipelines-without-inner-topic}/output.json (94%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-without-outer-topic => hack-proposal-nested-pipelines-without-outer-topic}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-nested-pipelines-without-outer-topic => hack-proposal-nested-pipelines-without-outer-topic}/output.json (88%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-no-topic-class-expression => hack-proposal-no-topic-class-expression}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-no-topic-class-expression => hack-proposal-no-topic-class-expression}/output.json (92%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-no-topic-function-expression => hack-proposal-no-topic-function-expression}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-no-topic-function-expression => hack-proposal-no-topic-function-expression}/output.json (94%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-simple-unbound-topic => hack-proposal-simple-unbound-topic}/input.js (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-simple-unbound-topic => hack-proposal-simple-unbound-topic}/options.json (79%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-topic-identity-parenthesized => hack-proposal-topic-identity-parenthesized}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-topic-identity-parenthesized => hack-proposal-topic-identity-parenthesized}/output.json (100%)
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-topic-identity-unparenthesized => hack-proposal-topic-identity-unparenthesized}/input.js (100%)
 create mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/options.json
 rename packages/babel-parser/test/fixtures/experimental/pipeline-operator/{smart-proposal-topic-identity-unparenthesized => hack-proposal-topic-identity-unparenthesized}/output.json (100%)
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/options.json
 delete mode 100644 packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/options.json
 rename packages/babel-plugin-proposal-pipeline-operator/src/{smartVisitor.js => hackVisitor.js} (95%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart+arrow => hack}/await/exec.js (51%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart+arrow => hack}/await/options.json (56%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart => hack}/basic/exec.js (100%)
 create mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/indirect-eval/exec.js
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart => hack}/nested/exec.js (100%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart => hack}/object-literal/exec.js (81%)
 create mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/options.json
 create mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/input.js
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart => hack}/topic-as-callee/output.js (100%)
 create mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-inside-arrow-function/exec.js
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart/await => hack/transform-arrow-functions}/exec.js (66%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart+arrow => hack/transform-arrow-functions}/options.json (65%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart/for-init/output.js => hack/while/exec.js} (62%)
 rename packages/babel-plugin-proposal-pipeline-operator/test/fixtures/{smart => hack}/yield/exec.js (93%)
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/options.json
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/options.json
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/exec.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/output.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/input.js
 delete mode 100644 packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/output.js

diff --git a/packages/babel-generator/test/fixtures/types/PipelineTopicExpression/input.js b/packages/babel-generator/test/fixtures/types/PipeBody/input.js
similarity index 100%
rename from packages/babel-generator/test/fixtures/types/PipelineTopicExpression/input.js
rename to packages/babel-generator/test/fixtures/types/PipeBody/input.js
diff --git a/packages/babel-generator/test/fixtures/types/PipeBody/options.json b/packages/babel-generator/test/fixtures/types/PipeBody/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/types/PipeBody/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-generator/test/fixtures/types/PipelineTopicExpression/output.js b/packages/babel-generator/test/fixtures/types/PipeBody/output.js
similarity index 100%
rename from packages/babel-generator/test/fixtures/types/PipelineTopicExpression/output.js
rename to packages/babel-generator/test/fixtures/types/PipeBody/output.js
diff --git a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/input.js b/packages/babel-generator/test/fixtures/types/PipelineBareFunction/input.js
deleted file mode 100644
index e5b2807245d0..000000000000
--- a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/input.js
+++ /dev/null
@@ -1 +0,0 @@
-let result = "hello" |> doubleSay |> text.capitalize |> a.b.exclaim;
diff --git a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/options.json b/packages/babel-generator/test/fixtures/types/PipelineBareFunction/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/output.js b/packages/babel-generator/test/fixtures/types/PipelineBareFunction/output.js
deleted file mode 100644
index e5b2807245d0..000000000000
--- a/packages/babel-generator/test/fixtures/types/PipelineBareFunction/output.js
+++ /dev/null
@@ -1 +0,0 @@
-let result = "hello" |> doubleSay |> text.capitalize |> a.b.exclaim;
diff --git a/packages/babel-generator/test/fixtures/types/PipelineTopicExpression/options.json b/packages/babel-generator/test/fixtures/types/PipelineTopicExpression/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-generator/test/fixtures/types/PipelineTopicExpression/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/ast/spec.md b/packages/babel-parser/ast/spec.md
index 48d37a300eb8..0642441f64a5 100644
--- a/packages/babel-parser/ast/spec.md
+++ b/packages/babel-parser/ast/spec.md
@@ -962,48 +962,13 @@ If `object` is `null`, then `callee` should be a `MemberExpression`.
 
 ### Pipeline
 
-These nodes are used by the Smart Pipeline to determine the type of the expression in a Pipeline Operator Expression. The F# Pipeline uses simple `BinaryExpression`s.
+These nodes are used by the Hack-style pipe operator. (The F# Pipeline uses simple `BinaryExpression`s and `AwaitExpression`s.)
 
-#### PipelineBody
+#### PipeBody
 
 ```js
-interface PipelineBody <: NodeBase {
-    type: "PipelineBody";
-}
-```
-
-#### PipelineBareFunctionBody
-
-```js
-interface PipelineBody <: NodeBase {
-    type: "PipelineBareFunctionBody";
-    callee: Expression;
-}
-```
-
-#### PipelineBareConstructorBody
-
-```js
-interface PipelineBareConstructorBody <: NodeBase {
-    type: "PipelineBareConstructorBody";
-    callee: Expression;
-}
-```
-
-#### PipelineBareAwaitedFunctionBody
-
-```js
-interface PipelineBareConstructorBody <: NodeBase {
-    type: "PipelineTopicBody";
-    expression: Expression;
-}
-```
-
-#### PipelineTopicBody
-
-```js
-interface PipelineBareConstructorBody <: NodeBase {
-    type: "PipelineBareAwaitedFunctionBody";
+interface PipeBody <: NodeBase {
+    type: "PipeBody";
     callee: Expression;
 }
 ```
diff --git a/packages/babel-parser/src/parser/error-message.js b/packages/babel-parser/src/parser/error-message.js
index 35c24b1dd9ae..4ecf3bdc5d2b 100644
--- a/packages/babel-parser/src/parser/error-message.js
+++ b/packages/babel-parser/src/parser/error-message.js
@@ -129,14 +129,14 @@ export const ErrorMessages = Object.freeze({
   ParamDupe: "Argument name clash",
   PatternHasAccessor: "Object pattern can't contain getter or setter",
   PatternHasMethod: "Object pattern can't contain methods",
-  PipelineBodyNoArrow:
-    'Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized',
+  PipeBodyCannotBeArrow:
+    'Unexpected arrow "=>" after pipeline body; arrow function acting as pipe body must be parenthesized due to operator precedence',
   PipelineTopicUnused:
-    "Pipeline is in topic style but does not use topic reference",
+    "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once",
   PrimaryTopicNotAllowed:
-    "Topic reference was used in a lexical context without topic binding",
-  PrimaryTopicRequiresSmartPipeline:
-    "Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option.",
+    "Topic reference is unbound; it must be inside a Hack-style pipe body",
+  PrimaryTopicRequiresHackPipes:
+    "Topic reference is used, but the pipelineOperator plugin was not passed a 'proposal': 'hack' option.",
   PrivateInExpectedIn:
     "Private names are only allowed in property accesses (`obj.#%0`) or in `in` expressions (`#%0 in obj`)",
   PrivateNameRedeclaration: "Duplicate private name #%0",
diff --git a/packages/babel-parser/src/parser/expression.js b/packages/babel-parser/src/parser/expression.js
index c466b025f664..38e24ef582fc 100644
--- a/packages/babel-parser/src/parser/expression.js
+++ b/packages/babel-parser/src/parser/expression.js
@@ -459,9 +459,9 @@ export default class ExpressionParser extends LValParser {
     switch (op) {
       case tt.pipeline:
         switch (this.getPluginOption("pipelineOperator", "proposal")) {
-          case "smart":
-            return this.withTopicPermittingContext(() => {
-              return this.parseSmartPipelineBody(
+          case "hack":
+            return this.withTopicBindingContext(() => {
+              return this.parseHackPipelineBody(
                 this.parseExprOpBaseRightExpr(op, prec),
                 startPos,
                 startLoc,
@@ -1152,10 +1152,8 @@ export default class ExpressionParser extends LValParser {
         if (this.state.inPipeline) {
           node = this.startNode();
 
-          if (
-            this.getPluginOption("pipelineOperator", "proposal") !== "smart"
-          ) {
-            this.raise(node.start, Errors.PrimaryTopicRequiresSmartPipeline);
+          if (this.getPluginOption("pipelineOperator", "proposal") !== "hack") {
+            this.raise(node.start, Errors.PrimaryTopicRequiresHackPipes);
           }
 
           this.next();
@@ -2465,32 +2463,32 @@ export default class ExpressionParser extends LValParser {
     return this.finishNode(node, "YieldExpression");
   }
 
-  parseSmartPipelineBody(
+  parseHackPipelineBody(
     childExpression: N.Expression,
     startPos: number,
     startLoc: Position,
   ): N.PipelineBody {
-    this.checkSmartPipelineBodyEarlyErrors();
+    this.checkHackPipelineBodyEarlyErrors();
 
-    return this.parseSmartPipelineBodyInStyle(
+    return this.parseHackPipelineBodyInStyle(
       childExpression,
       startPos,
       startLoc,
     );
   }
 
-  checkSmartPipelineBodyEarlyErrors(): void {
+  checkHackPipelineBodyEarlyErrors(): void {
     if (this.match(tt.arrow)) {
       // If the following token is invalidly `=>`, then throw a human-friendly error
       // instead of something like 'Unexpected token, expected ";"'.
       // For example, `x => x |> y => %` groups into `x => (x |> y) => %`,
       // and `(x |> y) => %` is an invalid arrow function.
       // This is because Hack-style `|>` has tighter precedence than `=>`.
-      throw this.raise(this.state.start, Errors.PipelineBodyNoArrow);
+      throw this.raise(this.state.start, Errors.PipeBodyCannotBeArrow);
     }
   }
 
-  parseSmartPipelineBodyInStyle(
+  parseHackPipelineBodyInStyle(
     childExpression: N.Expression,
     startPos: number,
     startLoc: Position,
@@ -2506,13 +2504,13 @@ export default class ExpressionParser extends LValParser {
     return this.finishNode(bodyNode, "PipelineTopicExpression");
   }
 
-  // Enable topic references from outer contexts within smart pipeline bodies.
+  // Enable topic references from outer contexts within Hack-style pipe bodies.
   // The function modifies the parser's topic-context state to enable or disable
-  // the use of topic references with the smartPipelines plugin. They then run a
-  // callback, then they reset the parser to the old topic-context state that it
-  // had before the function was called.
+  // the use of topic references.
+  // The function then calls a callback, then resets the parser
+  // to the old topic-context state that it had before the function was called.
 
-  withTopicPermittingContext<T>(callback: () => T): T {
+  withTopicBindingContext<T>(callback: () => T): T {
     const outerContextTopicState = this.state.topicContext;
     this.state.topicContext = {
       // Enable the use of the primary topic reference.
diff --git a/packages/babel-parser/src/plugin-utils.js b/packages/babel-parser/src/plugin-utils.js
index 777ee42b20bf..312c0b214ce3 100644
--- a/packages/babel-parser/src/plugin-utils.js
+++ b/packages/babel-parser/src/plugin-utils.js
@@ -38,7 +38,7 @@ export function getPluginOption(
   return null;
 }
 
-const PIPELINE_PROPOSALS = ["minimal", "smart", "fsharp"];
+const PIPELINE_PROPOSALS = ["minimal", "fsharp", "hack"];
 const RECORD_AND_TUPLE_SYNTAX_TYPES = ["hash", "bar"];
 
 export function validatePlugins(plugins: PluginList) {
diff --git a/packages/babel-parser/src/tokenizer/state.js b/packages/babel-parser/src/tokenizer/state.js
index b3a45637bbe9..1eefc1e43ce0 100644
--- a/packages/babel-parser/src/tokenizer/state.js
+++ b/packages/babel-parser/src/tokenizer/state.js
@@ -68,13 +68,13 @@ export default class State {
   isDeclareContext: boolean = false;
   inAbstractClass: boolean = false;
 
-  // For the smartPipelines plugin:
+  // For the Hack-style pipelines plugin
   topicContext: TopicContextState = {
     maxNumOfResolvableTopics: 0,
     maxTopicIndex: null,
   };
 
-  // For the F# plugin
+  // For the F#-style pipelines plugin
   soloAwait: boolean = false;
   inFSharpPipelineDirectBody: boolean = false;
 
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/fsharp-proposal-invalid-primary-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/fsharp-proposal-invalid-primary-topic/output.json
index 6c724302e0b3..09d380af7eee 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/fsharp-proposal-invalid-primary-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/fsharp-proposal-invalid-primary-topic/output.json
@@ -2,8 +2,8 @@
   "type": "File",
   "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
   "errors": [
-    "SyntaxError: Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option. (1:5)",
-    "SyntaxError: Topic reference was used in a lexical context without topic binding (1:5)"
+    "SyntaxError: Topic reference is used, but the pipelineOperator plugin was not passed a 'proposal': 'hack' option. (1:5)",
+    "SyntaxError: Topic reference is unbound; it must be inside a Hack-style pipe body (1:5)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-first/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-with-topic-last/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/output.json
similarity index 93%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/output.json
index 6e09acd357ab..8e6373dc4b66 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-addition-without-topic/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":14,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":14}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:9)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:9)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-parenthesized/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/options.json
new file mode 100644
index 000000000000..aa71d07c8dce
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-arrow-function-unparenthesized/options.json
@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    [
+      "pipelineOperator",
+      {
+        "proposal": "hack"
+      }
+    ]
+  ],
+  "throws": "Unexpected arrow \"=>\" after pipeline body; arrow function acting as pipe body must be parenthesized due to operator precedence (1:8)"
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-async-await/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/output.json
similarity index 93%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/output.json
index 556699d07afc..03f785140fc2 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-computed-no-topic/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":13,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":13}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:9)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:9)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json
similarity index 56%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json
index 680f780892b7..a06133695fbe 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/options.json
@@ -1,6 +1,6 @@
 {
   "plugins": [
-    ["pipelineOperator", { "proposal": "smart" }],
+    ["pipelineOperator", { "proposal": "hack" }],
     "doExpressions",
     "asyncGenerators"
   ]
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-await-of-loop-and-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-body/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-body/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-if-statement-and-topic-in-if-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-topic-identity/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
new file mode 100644
index 000000000000..bae88d1de4ef
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "doExpressions"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-do-expression-with-while-loop-topic-in-loop-head/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-call-with-topic-in-argument/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-function-definition-with-topic-in-default-parameter/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-generator-yield/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/options.json
new file mode 100644
index 000000000000..2d4df410c590
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-invalid-hash-token-then-digit/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]],
+  "throws": "Unexpected digit after hash token (1:5)"
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/options.json
new file mode 100644
index 000000000000..5776615207b9
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }], "pipelineOperator"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-mixed-pipeline-plugins/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-with-required-topics/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json
similarity index 96%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json
index e8ce055d0d81..564ec9b03566 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-inner-topic/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":22,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":22}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:16)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:16)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json
similarity index 95%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json
index 1c55597d1ea8..b3a11c15ae94 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-arrow-function-without-outer-topic/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:5)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:5)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-with-function-call/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/output.json
similarity index 94%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/output.json
index 4e08420cc88a..76351842ac58 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-inner-topic/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":15,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":15}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:11)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:11)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/output.json
similarity index 88%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/output.json
index ad7f01b6f022..328cd3371d44 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-nested-pipelines-without-outer-topic/output.json
@@ -2,8 +2,8 @@
   "type": "File",
   "start":0,"end":13,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":13}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:11)",
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:5)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:11)",
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:5)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/output.json
similarity index 92%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/output.json
index 4c0d88c5a719..ca143969373f 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-class-expression/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:9)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:9)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/output.json
similarity index 94%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/output.json
index 18fa5a9166ad..630a31a6e40c 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/output.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-no-topic-function-expression/output.json
@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":33}},
   "errors": [
-    "SyntaxError: Pipeline is in topic style but does not use topic reference (1:9)"
+    "SyntaxError: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once (1:9)"
   ],
   "program": {
     "type": "Program",
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-simple-unbound-topic/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-simple-unbound-topic/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-simple-unbound-topic/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-simple-unbound-topic/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-simple-unbound-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-simple-unbound-topic/options.json
similarity index 79%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-simple-unbound-topic/options.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-simple-unbound-topic/options.json
index 602ec88c9337..1051e014e79f 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-simple-unbound-topic/options.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-simple-unbound-topic/options.json
@@ -3,9 +3,9 @@
     [
       "pipelineOperator",
       {
-        "proposal": "smart"
+        "proposal": "hack"
       }
     ]
   ],
   "throws": "Unexpected token (1:4)"
-}
\ No newline at end of file
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-parenthesized/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/input.js b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/input.js
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/input.js
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/input.js
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/options.json
new file mode 100644
index 000000000000..bbfdd3ecc63c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "hack" }]]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/output.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/output.json
similarity index 100%
rename from packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/output.json
rename to packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-proposal-topic-identity-unparenthesized/output.json
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/invalid-proposal/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/invalid-proposal/options.json
index d8fca74323cf..3bda6a4723fc 100644
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/invalid-proposal/options.json
+++ b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/invalid-proposal/options.json
@@ -1,4 +1,4 @@
 {
   "plugins": [["pipelineOperator", { "proposal": "invalid" }]],
-  "throws": "'pipelineOperator' requires 'proposal' option whose value should be one of: 'minimal', 'smart', 'fsharp'"
+  "throws": "'pipelineOperator' requires 'proposal' option whose value should be one of: 'minimal', 'fsharp', 'hack'"
 }
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-first/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-with-topic-last/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-addition-without-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-parenthesized/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/options.json
deleted file mode 100644
index a684795fbfb9..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-arrow-function-unparenthesized/options.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]],
-  "throws": "Unexpected arrow \"=>\" after pipeline body; arrow function in pipeline body must be parenthesized (1:8)"
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-async-await/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-computed-no-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-do-while-loop-and-topic-in-loop-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-classic-loop-and-topic-in-loop-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-in-loop-and-topic-in-loop-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-for-of-loop-and-topic-in-loop-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-body/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-else-if-body/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-body/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-if-statement-and-topic-in-if-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-body/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-switch-statement-and-topic-in-switch-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-topic-identity/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-finally-clause/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-finally-statements-and-topic-in-try-clause/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-try-catch-statements-topic-in-try-clause/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
deleted file mode 100644
index edb7679c6a74..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-do-expression-with-while-loop-topic-in-loop-head/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "doExpressions"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-call-with-topic-in-argument/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-function-definition-with-topic-in-default-parameter/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-generator-yield/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/options.json
deleted file mode 100644
index a2f6f625f90c..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-invalid-hash-token-followed-by-digit/options.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]],
-  "throws": "Unexpected digit after hash token (1:5)"
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/options.json
deleted file mode 100644
index 887155e27e68..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-mixed-pipeline-plugins/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }], "pipelineOperator"]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-inner-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function-without-outer-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-with-arrow-function/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-inner-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines-without-outer-topic/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-nested-pipelines/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-class-expression/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-no-topic-function-expression/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-parenthesized/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/options.json b/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/options.json
deleted file mode 100644
index 17e4e327bbad..000000000000
--- a/packages/babel-parser/test/fixtures/experimental/pipeline-operator/smart-proposal-topic-identity-unparenthesized/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["pipelineOperator", { "proposal": "smart" }]]
-}
diff --git a/packages/babel-parser/typings/babel-parser.d.ts b/packages/babel-parser/typings/babel-parser.d.ts
index 4f22e6656d2b..8212b71436ba 100644
--- a/packages/babel-parser/typings/babel-parser.d.ts
+++ b/packages/babel-parser/typings/babel-parser.d.ts
@@ -157,7 +157,7 @@ export interface DecoratorsPluginOptions {
 }
 
 export interface PipelineOperatorPluginOptions {
-  proposal: "fsharp" | "minimal" | "smart";
+  proposal: "minimal" | "fsharp" | "hack";
 }
 
 export interface RecordAndTuplePluginOptions {
diff --git a/packages/babel-plugin-proposal-pipeline-operator/src/smartVisitor.js b/packages/babel-plugin-proposal-pipeline-operator/src/hackVisitor.js
similarity index 95%
rename from packages/babel-plugin-proposal-pipeline-operator/src/smartVisitor.js
rename to packages/babel-plugin-proposal-pipeline-operator/src/hackVisitor.js
index 4b41ffabba31..a5cc641cb13d 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/src/smartVisitor.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/src/hackVisitor.js
@@ -9,7 +9,7 @@ const updateTopicReferenceVisitor = {
   },
 };
 
-const smartVisitor = {
+const hackVisitor = {
   BinaryExpression(path) {
     const { scope } = path;
     const { node } = path;
@@ -45,4 +45,4 @@ const smartVisitor = {
   },
 };
 
-export default smartVisitor;
+export default hackVisitor;
diff --git a/packages/babel-plugin-proposal-pipeline-operator/src/index.js b/packages/babel-plugin-proposal-pipeline-operator/src/index.js
index 241a99b87828..542b67a46888 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/src/index.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/src/index.js
@@ -1,12 +1,12 @@
 import { declare } from "@babel/helper-plugin-utils";
 import syntaxPipelineOperator from "@babel/plugin-syntax-pipeline-operator";
 import minimalVisitor from "./minimalVisitor";
-import smartVisitor from "./smartVisitor";
+import hackVisitor from "./hackVisitor";
 import fsharpVisitor from "./fsharpVisitor";
 
 const visitorsPerProposal = {
   minimal: minimalVisitor,
-  smart: smartVisitor,
+  hack: hackVisitor,
   fsharp: fsharpVisitor,
 };
 
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/exec.js
similarity index 51%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/exec.js
index 7e7ea94bd4cb..22f7d8529839 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/exec.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/exec.js
@@ -1,11 +1,12 @@
-const triple = (x) => x * 3;
+function triple (x) {
+  return x * 3
+}
 
 async function myFunction(n) {
   return n
-    |> Math.abs
-    |> Promise.resolve(#)
-    |> await #
-    |> triple;
+    |> Math.abs(#)
+    |> await Promise.resolve(#)
+    |> triple(#);
 }
 
 return myFunction(-7).then(result => {
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/options.json b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/options.json
similarity index 56%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/options.json
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/options.json
index f19c36b8eef1..a7c9bd393cd4 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/await/options.json
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/await/options.json
@@ -1,4 +1,5 @@
 {
+  "plugins": [["proposal-pipeline-operator", { "proposal": "hack" }]],
   "parserOpts": {
     "allowReturnOutsideFunction": true
   },
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/basic/exec.js
similarity index 100%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/basic/exec.js
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/indirect-eval/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/indirect-eval/exec.js
new file mode 100644
index 000000000000..0a1c0ce7409d
--- /dev/null
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/indirect-eval/exec.js
@@ -0,0 +1,4 @@
+const program = '(function() { return this; })()';
+const result = program |> eval(#);
+
+expect(result).not.toBeUndefined();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/nested/exec.js
similarity index 100%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/nested/exec.js
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/object-literal/exec.js
similarity index 81%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/object-literal/exec.js
index 830e80efc6f9..79eba6354f81 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/exec.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/object-literal/exec.js
@@ -3,8 +3,8 @@ function area(rect) {
 }
 
 const result = -5
-  |> Math.abs
+  |> Math.abs(#)
   |> ({ width: #, height: # + 3 })
-  |> area;
+  |> area(#);
 
 expect(result).toBe(40);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/options.json b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/options.json
new file mode 100644
index 000000000000..70795b3a7835
--- /dev/null
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/options.json
@@ -0,0 +1,6 @@
+{
+  "plugins": [["proposal-pipeline-operator", { "proposal": "hack" }]],
+  "parserOpts": {
+    "allowReturnOutsideFunction": true
+  }
+}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/input.js
new file mode 100644
index 000000000000..1edae3c479c0
--- /dev/null
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/input.js
@@ -0,0 +1 @@
+v |> #.method() |> f(#);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/output.js
similarity index 100%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/output.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-as-callee/output.js
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-inside-arrow-function/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-inside-arrow-function/exec.js
new file mode 100644
index 000000000000..d65f5abae857
--- /dev/null
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/topic-inside-arrow-function/exec.js
@@ -0,0 +1,5 @@
+const result = -2.2 // -2.2
+  |> Math.floor(#) // -3
+  |> (() => Math.pow(#, 5)) // () => -243
+  |> #() // -243
+  |> Math.sign(#); // -1
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/exec.js
similarity index 66%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/exec.js
index 7e7ea94bd4cb..12bb1514eff7 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/exec.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/exec.js
@@ -2,10 +2,9 @@ const triple = (x) => x * 3;
 
 async function myFunction(n) {
   return n
-    |> Math.abs
-    |> Promise.resolve(#)
-    |> await #
-    |> triple;
+    |> Math.abs(#)
+    |> await Promise.resolve(#)
+    |> triple(#);
 }
 
 return myFunction(-7).then(result => {
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/options.json b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/options.json
similarity index 65%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/options.json
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/options.json
index 2453ef11a549..44ee26913935 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart+arrow/options.json
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/transform-arrow-functions/options.json
@@ -1,6 +1,6 @@
 {
   "plugins": [
-    ["proposal-pipeline-operator", { "proposal": "smart" }],
+    ["proposal-pipeline-operator", { "proposal": "hack" }],
     "transform-arrow-functions"
   ],
   "parserOpts": {
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/while/exec.js
similarity index 62%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/output.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/while/exec.js
index 23b1465b27a5..a7d99f77ef42 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/output.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/while/exec.js
@@ -1,9 +1,7 @@
+let i = 0;
 let sum = 0;
 
-for (var i = (_ = 0, _); i <= 10; i++) {
-  var _;
-
+while (i |> (i = # + 1) |> # <= 10)
   sum = sum + i;
-}
 
 expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/yield/exec.js
similarity index 93%
rename from packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/exec.js
rename to packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/yield/exec.js
index f998a1157ed0..f8abf7114ad6 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/exec.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack/yield/exec.js
@@ -1,7 +1,7 @@
 function *myGenerator(n) {
   return n
   |> (yield #)
-  |> Math.abs;
+  |> Math.abs(#);
 }
 
 const myIterator = myGenerator(15);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/input.js
deleted file mode 100644
index 09ec8493000b..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/input.js
+++ /dev/null
@@ -1,6 +0,0 @@
-async function myFunction(n) {
-  return n
-    |> Math.abs
-    |> Promise.resolve(#)
-    |> await #;
-}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/options.json b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/options.json
deleted file mode 100644
index df1848815387..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/options.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "plugins": [["proposal-pipeline-operator", { "proposal": "smart" }]],
-  "parserOpts": {
-    "allowReturnOutsideFunction": true
-  },
-  "minNodeVersion": "8.0.0"
-}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/output.js
deleted file mode 100644
index bf7848696774..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/await/output.js
+++ /dev/null
@@ -1,5 +0,0 @@
-async function myFunction(n) {
-  var _ref, _ref2, _n;
-
-  return _ref = (_ref2 = (_n = n, Math.abs(_n)), Promise.resolve(_ref2)), await _ref;
-}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/exec.js
deleted file mode 100644
index 93371d387af7..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/exec.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const abs = Math.abs;
-
-const value = -5.9
-|> abs
-|> Math.floor;
-
-expect(value).toBe(5);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/input.js
deleted file mode 100644
index be7fbdbd4cf5..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-const abs = Math.abs;
-
-const value = -5.9
-|> abs
-|> Math.floor;
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/output.js
deleted file mode 100644
index d89c931323d0..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/bare-function/output.js
+++ /dev/null
@@ -1,4 +0,0 @@
-var _ref, _;
-
-const abs = Math.abs;
-const value = (_ref = (_ = -5.9, abs(_)), Math.floor(_ref));
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/input.js
deleted file mode 100644
index 839ae46a7434..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/input.js
+++ /dev/null
@@ -1,4 +0,0 @@
-var result = 5
-  |> # + 1
-  |> # + #
-  |> Math.pow(((x) => (x * 7))(#), 2)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/output.js
deleted file mode 100644
index 0f5af7ba9589..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/basic/output.js
+++ /dev/null
@@ -1,3 +0,0 @@
-var _ref, _ref2, _;
-
-var result = (_ref = (_ref2 = (_ = 5, _ + 1), _ref2 + _ref2), Math.pow((x => x * 7)(_ref), 2));
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/exec.js
deleted file mode 100644
index 857fc6ce5b67..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/exec.js
+++ /dev/null
@@ -1,5 +0,0 @@
-let sum = 0;
-for (var i = 0 |> #; i <= 10; i++) 
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/input.js
deleted file mode 100644
index 857fc6ce5b67..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-init/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-let sum = 0;
-for (var i = 0 |> #; i <= 10; i++) 
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/exec.js
deleted file mode 100644
index 41d1e0584ab9..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/exec.js
+++ /dev/null
@@ -1,6 +0,0 @@
-let sum = 0;
-for (var i = 0; i <= 10; i = i |> # + 1) {
-  sum = sum + i;
-}
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/input.js
deleted file mode 100644
index 41d1e0584ab9..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/input.js
+++ /dev/null
@@ -1,6 +0,0 @@
-let sum = 0;
-for (var i = 0; i <= 10; i = i |> # + 1) {
-  sum = sum + i;
-}
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/output.js
deleted file mode 100644
index 0ca0f35ad87b..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for-update/output.js
+++ /dev/null
@@ -1,9 +0,0 @@
-let sum = 0;
-
-for (var i = 0; i <= 10; i = (_i = i, _i + 1)) {
-  var _i;
-
-  sum = sum + i;
-}
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/exec.js
deleted file mode 100644
index e1278cd25d46..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/exec.js
+++ /dev/null
@@ -1,5 +0,0 @@
-let sum = 0;
-for (var i = 0; i |> # <= 10; i++) 
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/input.js
deleted file mode 100644
index 279b128e2da9..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-let sum = 0;
-for (var i = 0; (i |> # <= 10); ++i) 
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/output.js
deleted file mode 100644
index 09d8bc056290..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/for/output.js
+++ /dev/null
@@ -1,9 +0,0 @@
-let sum = 0;
-
-for (var i = 0; _i = i, _i <= 10; ++i) {
-  var _i;
-
-  sum = sum + i;
-}
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/input.js
deleted file mode 100644
index 7b3de3747bbf..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/input.js
+++ /dev/null
@@ -1,4 +0,0 @@
-if (v |> e |> f)
-  g() |> h(#, #+1) |> i;
-else
-  j();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/output.js
deleted file mode 100644
index 3b71d143ae79..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/if/output.js
+++ /dev/null
@@ -1,3 +0,0 @@
-var _ref, _v, _ref2, _g;
-
-if (_ref = (_v = v, e(_v)), f(_ref)) _ref2 = (_g = g(), h(_g, _g + 1)), i(_ref2);else j();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/exec.js
deleted file mode 100644
index 30efd15ea92a..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/exec.js
+++ /dev/null
@@ -1,7 +0,0 @@
-(function() {
-  'use strict';
-  var result = '(function() { return this; })()'
-    |> eval;
-
-  expect(result).not.toBeUndefined();
-})();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/input.js
deleted file mode 100644
index 30efd15ea92a..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/input.js
+++ /dev/null
@@ -1,7 +0,0 @@
-(function() {
-  'use strict';
-  var result = '(function() { return this; })()'
-    |> eval;
-
-  expect(result).not.toBeUndefined();
-})();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/output.js
deleted file mode 100644
index 3c53e6d4f3bf..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/indirect-eval/output.js
+++ /dev/null
@@ -1,8 +0,0 @@
-(function () {
-  'use strict';
-
-  var _functionReturn;
-
-  var result = (_functionReturn = '(function() { return this; })()', (0, eval)(_functionReturn));
-  expect(result).not.toBeUndefined();
-})();
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/input.js
deleted file mode 100644
index 1903dbd95b72..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-var result = 5
-  |> Math.pow(#, 2)
-  |> [ 10, 20, 30, 40, 50 ].filter(n => #
-    |> n > #
-    |> !#);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/output.js
deleted file mode 100644
index d5266c661786..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/nested/output.js
+++ /dev/null
@@ -1,7 +0,0 @@
-var _ref, _;
-
-var result = (_ref = (_ = 5, Math.pow(_, 2)), [10, 20, 30, 40, 50].filter(n => {
-  var _ref2, _ref3;
-
-  return _ref2 = (_ref3 = _ref, n > _ref3), !_ref2;
-}));
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/input.js
deleted file mode 100644
index 1cc7970ff08c..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/input.js
+++ /dev/null
@@ -1,8 +0,0 @@
-function area(rect) {
-  return rect.width * rect.height;
-}
-
-const result = -5
-  |> Math.abs
-  |> ({ width: #, height: # + 3 })
-  |> area;
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/output.js
deleted file mode 100644
index f558d2a62a01..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/object-literal/output.js
+++ /dev/null
@@ -1,10 +0,0 @@
-var _ref, _ref2, _;
-
-function area(rect) {
-  return rect.width * rect.height;
-}
-
-const result = (_ref = (_ref2 = (_ = -5, Math.abs(_)), {
-  width: _ref2,
-  height: _ref2 + 3
-}), area(_ref));
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/options.json b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/options.json
deleted file mode 100644
index d8c03ffdf701..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/options.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "plugins": [["proposal-pipeline-operator", { "proposal": "smart" }]],
-  "parserOpts": {
-    "allowReturnOutsideFunction": true
-  }
-}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/input.js
deleted file mode 100644
index 5935729f4958..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-as-callee/input.js
+++ /dev/null
@@ -1 +0,0 @@
-v |> #.method() |> f;
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/exec.js
deleted file mode 100644
index c5837e4a0b58..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/exec.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const result = -2.2   // -2.2
-  |> Math.floor       // -3
-  |> (() => Math.pow(#, 5))   // () => -243
-  |> #()              // -243
-  |> Math.sign;       // -1
-
-expect(result).toBe(-1);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/input.js
deleted file mode 100644
index 14a6f5b6c1d9..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-const result = -2.2   // -2.2
-  |> Math.floor       // -3
-  |> (() => Math.pow(#, 5))   // () => -243
-  |> #()              // -243
-  |> Math.sign;       // -1
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/output.js
deleted file mode 100644
index 35aee7ed2a42..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/topic-inside-arrow-function/output.js
+++ /dev/null
@@ -1,7 +0,0 @@
-var _ref, _ref2, _ref3, _;
-
-const result = (_ref = (_ref2 = (_ref3 = (_ = -2.2 // -2.2
-, Math.floor(_) // -3
-), () => Math.pow(_ref3, 5) // () => -243
-), _ref2() // -243
-), Math.sign(_ref)); // -1
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/exec.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/exec.js
deleted file mode 100644
index 4a86c3eab4f4..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/exec.js
+++ /dev/null
@@ -1,7 +0,0 @@
-let i = 0
-let sum = 0
-
-while (i |> (i = # + 1) |> # <= 10)
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/input.js
deleted file mode 100644
index 4a86c3eab4f4..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/input.js
+++ /dev/null
@@ -1,7 +0,0 @@
-let i = 0
-let sum = 0
-
-while (i |> (i = # + 1) |> # <= 10)
-  sum = sum + i;
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1)
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/output.js
deleted file mode 100644
index 975844fd1286..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/while/output.js
+++ /dev/null
@@ -1,10 +0,0 @@
-let i = 0;
-let sum = 0;
-
-while (_ref = (_i = i, i = _i + 1), _ref <= 10) {
-  var _ref, _i;
-
-  sum = sum + i;
-}
-
-expect(sum).toBe(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1);
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/input.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/input.js
deleted file mode 100644
index 602d85a0e1fe..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/input.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function *myGenerator(n) {
-  return n
-    |> (yield #)
-    |> Math.abs;
-}
diff --git a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/output.js b/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/output.js
deleted file mode 100644
index 3ca1e506b2cf..000000000000
--- a/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/yield/output.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function* myGenerator(n) {
-  var _ref, _n;
-
-  return _ref = (_n = n, yield _n), Math.abs(_ref);
-}
diff --git a/packages/babel-plugin-syntax-pipeline-operator/src/index.js b/packages/babel-plugin-syntax-pipeline-operator/src/index.js
index df904e77644c..0606896baa09 100644
--- a/packages/babel-plugin-syntax-pipeline-operator/src/index.js
+++ b/packages/babel-plugin-syntax-pipeline-operator/src/index.js
@@ -1,6 +1,6 @@
 import { declare } from "@babel/helper-plugin-utils";
 
-export const proposals = ["minimal", "smart", "fsharp"];
+export const proposals = ["minimal", "fsharp", "hack"];
 
 export default declare((api, { proposal }) => {
   api.assertVersion(7);