Async code fix issues concerning underscores and nested promises #27156
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uniqueiniquity
changed the title
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Would it be interesting to test the case where the handler returns a promise of a promise? |
amcasey
reviewed
Sep 17, 2018
ghost
mentioned this pull request
amcasey
reviewed
Sep 17, 2018
amcasey
reviewed
Sep 17, 2018
ghost
reviewed
Sep 17, 2018
| @@ -391,9 +389,14 @@ namespace ts.codefix { | |||
| return [createReturn(getSynthesizedDeepClone(node))]; | |||
| } | |||
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| function createVariableDeclarationOrAssignment(prevArgName: SynthIdentifier, rightHandSide: Expression, transformer: Transformer): NodeArray<Statement> { | |||
| function createVariableDeclarationOrAssignment(prevArgName: SynthIdentifier | undefined, rightHandSide: Expression, transformer: Transformer): NodeArray<Statement> { | |||
| if (!prevArgName || prevArgName.identifier.text.length === 0) { | |||
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When does the second condition here ever happen? Shouldn't we just avoid synthesizing an empty identifier in the first place?
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Sure. There's a place in the code here where we explicitly do that, but I can find another way to handle that case.
amcasey
reviewed
Sep 17, 2018
ghost
approved these changes
Sep 17, 2018
amcasey
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Sep 18, 2018
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Fixes #27112.
If the handler function for a promise itself returns a promise, then the value of the outer promise is resolved to the value of the inner. However, currently the async code fix does not wrap await the inner promise in this situation. This PR changes the behavior so that if the handler of a promise that's being fixed returns a promise, an
awaitis added.Additionally, this PR fixes an issue where if a promise handler doesn't have a bound parameter name (e.g.,
_), then the preceding promise handler would be deleted. This caused issues when the previous promise handler had side effects.