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Merge pull request #20229 from Microsoft/fixParenthesizedAsyncArrowFunction

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Fix parenthesized async arrow function
This commit is contained in:
Anders Hejlsberg
2017-11-22 19:50:35 -08:00
committed by GitHub
parent fedc459ae1 c8c46f6d45
commit 61094ec2ea
5 changed files with 70 additions and 2 deletions
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4
src/compiler/parser.ts
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@@ -3281,7 +3281,7 @@ namespace ts {
// Check for "(xxx yyy", where xxx is a modifier and yyy is an identifier. This
// isn't actually allowed, but we want to treat it as a lambda so we can provide
// a good error message.
if (isModifierKind(second) && lookAhead(nextTokenIsIdentifier)) {
if (isModifierKind(second) && second !== SyntaxKind.AsyncKeyword && lookAhead(nextTokenIsIdentifier)) {
return Tristate.True;
}
@@ -3298,7 +3298,7 @@ namespace ts {
return Tristate.True;
case SyntaxKind.QuestionToken:
nextToken();
// If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lamnda.
// If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lambda.
if (token() === SyntaxKind.ColonToken || token() === SyntaxKind.CommaToken || token() === SyntaxKind.EqualsToken || token() === SyntaxKind.CloseParenToken) {
return Tristate.True;
}