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add related info to error for use of for-await-of in non-async function

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uhyo 2019-05-02 01:16:25 +09:00
parent b0143bb446
commit 246b66c714
1 changed files with 14 additions and 1 deletions
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15
src/compiler/checker.ts
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@ -31598,7 +31598,20 @@ namespace ts {
if (forInOrOfStatement.kind === SyntaxKind.ForOfStatement && forInOrOfStatement.awaitModifier) {
if ((forInOrOfStatement.flags & NodeFlags.AwaitContext) === NodeFlags.None) {
return grammarErrorOnNode(forInOrOfStatement.awaitModifier, Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
// use of 'for-await-of' in non-async function
const sourceFile = getSourceFileOfNode(forInOrOfStatement);
if (!hasParseDiagnostics(sourceFile)) {
const diagnostic = createDiagnosticForNode(forInOrOfStatement.awaitModifier, Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
const func = getContainingFunction(forInOrOfStatement);
if (func) {
Debug.assert((getFunctionFlags(func) & FunctionFlags.Async) === 0, "Enclosing function should never be an async function.");
const relatedInfo = createDiagnosticForNode(func, Diagnostics.Did_you_mean_to_mark_this_function_as_async);
addRelatedInfo(diagnostic, relatedInfo);
}
diagnostics.add(diagnostic);
return true;
}
return false;
}
}