From cfd26fdbf27a4c3eae2311ca145e36bc13dd2abc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Mon, 18 Nov 2019 13:04:34 -0500
Subject: [PATCH] register ImportEqualsSpecifier to scope (#10710)

Co-authored-by: <jaejoon.choi>
---
 .../src/plugins/typescript/index.js           |   7 +
 .../export-named-import-require/input.ts      |   2 +
 .../export-named-import-require/output.json   | 171 ++++++++++++++++++
 3 files changed, 180 insertions(+)
 create mode 100644 packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/input.ts
 create mode 100644 packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/output.json

diff --git a/packages/babel-parser/src/plugins/typescript/index.js b/packages/babel-parser/src/plugins/typescript/index.js
index 4cf196b9a704..1ca9c6a71cce 100644
--- a/packages/babel-parser/src/plugins/typescript/index.js
+++ b/packages/babel-parser/src/plugins/typescript/index.js
@@ -21,6 +21,7 @@ import {
   BIND_TS_AMBIENT,
   BIND_TS_NAMESPACE,
   BIND_CLASS,
+  BIND_LEXICAL,
 } from "../../util/scopeflags";
 import TypeScriptScopeHandler from "./scope";
 import * as charCodes from "charcodes";
@@ -1292,6 +1293,12 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     ): N.TsImportEqualsDeclaration {
       node.isExport = isExport || false;
       node.id = this.parseIdentifier();
+      this.checkLVal(
+        node.id,
+        BIND_LEXICAL,
+        undefined,
+        "import equals declaration",
+      );
       this.expect(tt.eq);
       node.moduleReference = this.tsParseModuleReference();
       this.semicolon();
diff --git a/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/input.ts b/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/input.ts
new file mode 100644
index 000000000000..6823138bafd9
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/input.ts
@@ -0,0 +1,2 @@
+import a = require("a");
+export { a };
diff --git a/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/output.json b/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/output.json
new file mode 100644
index 000000000000..4c31f00de348
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/typescript/import/export-named-import-require/output.json
@@ -0,0 +1,171 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 38,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 2,
+      "column": 13
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 38,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 2,
+        "column": 13
+      }
+    },
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "TSImportEqualsDeclaration",
+        "start": 0,
+        "end": 24,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 24
+          }
+        },
+        "isExport": false,
+        "id": {
+          "type": "Identifier",
+          "start": 7,
+          "end": 8,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 7
+            },
+            "end": {
+              "line": 1,
+              "column": 8
+            },
+            "identifierName": "a"
+          },
+          "name": "a"
+        },
+        "moduleReference": {
+          "type": "TSExternalModuleReference",
+          "start": 11,
+          "end": 23,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 11
+            },
+            "end": {
+              "line": 1,
+              "column": 23
+            }
+          },
+          "expression": {
+            "type": "StringLiteral",
+            "start": 19,
+            "end": 22,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 19
+              },
+              "end": {
+                "line": 1,
+                "column": 22
+              }
+            },
+            "extra": {
+              "rawValue": "a",
+              "raw": "\"a\""
+            },
+            "value": "a"
+          }
+        }
+      },
+      {
+        "type": "ExportNamedDeclaration",
+        "start": 25,
+        "end": 38,
+        "loc": {
+          "start": {
+            "line": 2,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 13
+          }
+        },
+        "specifiers": [
+          {
+            "type": "ExportSpecifier",
+            "start": 34,
+            "end": 35,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 9
+              },
+              "end": {
+                "line": 2,
+                "column": 10
+              }
+            },
+            "local": {
+              "type": "Identifier",
+              "start": 34,
+              "end": 35,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 9
+                },
+                "end": {
+                  "line": 2,
+                  "column": 10
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            },
+            "exported": {
+              "type": "Identifier",
+              "start": 34,
+              "end": 35,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 9
+                },
+                "end": {
+                  "line": 2,
+                  "column": 10
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            }
+          }
+        ],
+        "source": null,
+        "declaration": null
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file