Allow JS constructor function to return non-void #16196
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mhegazy
reviewed
Jun 1, 2017
src/compiler/checker.ts
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| @@ -15835,7 +15835,7 @@ namespace ts { | |||
| const callSignatures = getSignaturesOfType(expressionType, SignatureKind.Call); | |||
| if (callSignatures.length) { | |||
| const signature = resolveCall(node, callSignatures, candidatesOutArray); | |||
| if (getReturnTypeOfSignature(signature) !== voidType) { | |||
| if (!isInJavaScriptFile(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) { | |||
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should not we check functionSymbol.members here to make sure the function has a this.prop = .. somewhere, and avoid something like new getNumber()
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Probably, but I need to fix #14056 first to properly resolve the underlying function to get to the symbols. Right now the symbol points to the local var declaration and doesn't have this information.
mhegazy
approved these changes
Jun 6, 2017
mhegazy
approved these changes
Jun 6, 2017
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This loosens the restriction that a function must return
voidif it is to be used as a constructor when the function is defined in a JavaScript file.Fixes #15959