avoid add parentheses for async do expressions

babel · Mar 26, 2021 · dd438d0 · dd438d0
1 parent 449e416
commit dd438d0
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Showing 4 changed files with 9 additions and 8 deletions.
diff --git a/packages/babel-generator/src/node/parentheses.ts b/packages/babel-generator/src/node/parentheses.ts
@@ -82,7 +82,8 @@ export function DoExpression(
   parent: any,
   printStack: Array<any>,
 ): boolean {
-  return isFirstInStatement(printStack);
+  // `async do` can start an expression statement
+  return !node.async && isFirstInStatement(printStack);
 }
 
 export function Binary(node: any, parent: any): boolean {

diff --git a/packages/babel-generator/test/fixtures/async-do-expressions/basic/input.js b/packages/babel-generator/test/fixtures/async-do-expressions/basic/input.js
@@ -1,5 +1,5 @@
-(async do {
+async do {
   1;
-});
+};
 
 (async do {});
diff --git a/packages/babel-generator/test/fixtures/async-do-expressions/basic/output.js b/packages/babel-generator/test/fixtures/async-do-expressions/basic/output.js
@@ -1,4 +1,4 @@
-(async do {
+async do {
   1;
-});
-(async do {});
+};
+async do {};
diff --git a/packages/babel-generator/test/fixtures/async-do-expressions/retain-lines/output.js b/packages/babel-generator/test/fixtures/async-do-expressions/retain-lines/output.js
@@ -1,3 +1,3 @@
 /* leading comments
-*/(async do
-{1;}) + 0;
+*/async do
+{1;} + 0;