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Title: Narrow generic conditional and indexed access return types when checking return statements by gabritto · Pull Request #56941 · microsoft/TypeScript · GitHub

Open Graph Title: Narrow generic conditional and indexed access return types when checking return statements by gabritto · Pull Request #56941 · microsoft/TypeScript

X Title: Narrow generic conditional and indexed access return types when checking return statements by gabritto · Pull Request #56941 · microsoft/TypeScript

Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - Narrow generic conditional and indexed access return types when checking return statements by gabritto · Pull Request #56941 · microsoft/TypeScript

Open Graph Description: Fixes #33912. Fixes #33014. Motivation Sometimes we want to write functions whose return type is picked between different options, depending on the type of a parameter. For instance: declare const ...

X Description: Fixes #33912. Fixes #33014. Motivation Sometimes we want to write functions whose return type is picked between different options, depending on the type of a parameter. For instance: declare const ...

Opengraph URL: https://github.com/microsoft/TypeScript/pull/56941

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og:image:altFixes #33912. Fixes #33014. Motivation Sometimes we want to write functions whose return type is picked between different options, depending on the type of a parameter. For instance: declare const ...
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nested types case in dependentReturnType6.ts testhttps://github.com/microsoft/TypeScript/pull/56941/files#diff-f40212beae0a9723380268c8a63a1560e91b9431a1fda539b2092cd4778e5fcfR28-R51
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WIP: custom instantiationhttps://github.com/microsoft/TypeScript/pull/56941/commits/0d393e324acb8353d386b4723756e914feefbd27
0d393e3https://github.com/microsoft/TypeScript/pull/56941/commits/0d393e324acb8353d386b4723756e914feefbd27
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fix more thingshttps://github.com/microsoft/TypeScript/pull/56941/commits/a1d9f89f5054034899d8ffd467898407223a3201
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Merge branch 'main' into gabritto/d2https://github.com/microsoft/TypeScript/pull/56941/commits/81cdee5ee98570d1944295359f50eb1c4ed27334
81cdee5https://github.com/microsoft/TypeScript/pull/56941/commits/81cdee5ee98570d1944295359f50eb1c4ed27334
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fix bare type parameter instantiationhttps://github.com/microsoft/TypeScript/pull/56941/commits/af57b3469c8e064595209ebb4cef120bbf8fda9c
af57b34https://github.com/microsoft/TypeScript/pull/56941/commits/af57b3469c8e064595209ebb4cef120bbf8fda9c
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change binder. BROKENhttps://github.com/microsoft/TypeScript/pull/56941/commits/01152a0df832520205c9b3498ed315ee89a9efef
01152a0https://github.com/microsoft/TypeScript/pull/56941/commits/01152a0df832520205c9b3498ed315ee89a9efef
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fix binder changehttps://github.com/microsoft/TypeScript/pull/56941/commits/eac319203a0da13ff58b0d7e0858e7f9ec4129f0
eac3192https://github.com/microsoft/TypeScript/pull/56941/commits/eac319203a0da13ff58b0d7e0858e7f9ec4129f0
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clean up + testshttps://github.com/microsoft/TypeScript/pull/56941/commits/199ecd028f0a0427d3bf1795b382db8661ef39b8
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WIPhttps://github.com/microsoft/TypeScript/pull/56941/commits/d0e85d0c5afc393b93cb50761492565985fa820b
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Merge branch 'main' into gabritto/d2https://github.com/microsoft/TypeScript/pull/56941/commits/23e3d33042674a5857dc24916656dce42c89e786
23e3d33https://github.com/microsoft/TypeScript/pull/56941/commits/23e3d33042674a5857dc24916656dce42c89e786
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defer conditional unless narrowinghttps://github.com/microsoft/TypeScript/pull/56941/commits/d9ac1027a371842567bc1f3e8bcfa594ea763915
d9ac102https://github.com/microsoft/TypeScript/pull/56941/commits/d9ac1027a371842567bc1f3e8bcfa594ea763915
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don't skip jsdoc type assertionshttps://github.com/microsoft/TypeScript/pull/56941/commits/b4910f45f8d9b1a44ae714e5ef0be865594ec292
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more fixeshttps://github.com/microsoft/TypeScript/pull/56941/commits/6258bc0ae2fcb900ab93a116afb934f4b5ca726f
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only narrow when we take a true branch of a conditionalhttps://github.com/microsoft/TypeScript/pull/56941/commits/04980d3e7bfc2457d305cdb5df3a0e3dd2a8a1bc
04980d3https://github.com/microsoft/TypeScript/pull/56941/commits/04980d3e7bfc2457d305cdb5df3a0e3dd2a8a1bc
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small fix + new testshttps://github.com/microsoft/TypeScript/pull/56941/commits/e60a625288302f2aceca6d53effe68089a4064b6
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fix optional parameter handling and shadowinghttps://github.com/microsoft/TypeScript/pull/56941/commits/ee2d1bad15f115ac7c0f213ace2bcfb8118909d7
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fix skip parentheseshttps://github.com/microsoft/TypeScript/pull/56941/commits/b8ce4903dac236e2f426bc5f0d4555c71592e46c
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fix updates to binder, cleanup in checkerhttps://github.com/microsoft/TypeScript/pull/56941/commits/24397676014f3e4b5b6ffbe112a57e33c9f293d4
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Merge branch 'main' into gabritto/d2https://github.com/microsoft/TypeScript/pull/56941/commits/3f504f4fbc1caf9c10814d48d8897a34f8a34dec
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HasFlowNode update & fixeshttps://github.com/microsoft/TypeScript/pull/56941/commits/5e8ca3ebdbf0cde7bdaf03e79fbc7d627fe0c09a
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cleanup; always check conditional expression's condition inside retur…https://github.com/microsoft/TypeScript/pull/56941/commits/534cc38847246051ff301bd1401b65abc023e71b
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