Contextual typing of partially annotated signatures#11673
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ahejlsberg merged 6 commits intomasterfrom Oct 18, 2016
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ahejlsberg
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OK, I merged the tests from #11529. |
Regression test for #10972
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sandersn
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One minor comment — there is a utility for checking the this parameter already.
src/compiler/checker.ts
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| // know that all parameters (including 'this') have type annotations and nothing is | ||
| // subject to contextual typing. | ||
| const parameter = firstOrUndefined(node.parameters); | ||
| return !(parameter && parameter.name.kind === SyntaxKind.Identifier && (<Identifier>parameter.name).text === "this"); |
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This can be written as !parameterIsThisKeyword(firstOrUndefined(node.parameters))
mhegazy
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This PR supersedes #11529 and #11600. Thanks to @HerringtonDarkholme for the original idea regarding type inference and contextual typing of partially annotated signatures.
We probably want to move the tests over from #11529. @sandersn Maybe you want to look at that?
Fixes #4241.
Fixes #9648.
Fixes #10850.
Fixes #10972.