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Improve contextual typing when the returnMapper is involved - #56953

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Mateusz Burzyński (Andarist) wants to merge 3 commits into
microsoft:mainfrom
Andarist:fix/contextual-type-return-mapper
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Improve contextual typing when the returnMapper is involved#56953
Mateusz Burzyński (Andarist) wants to merge 3 commits into
microsoft:mainfrom
Andarist:fix/contextual-type-return-mapper

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@Andarist

@Andarist Mateusz Burzyński (Andarist) commented Jan 4, 2024

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fixes #56912
fixes #50787

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Generic constraint wipes out precise key type Literal strings with generics are inconsistant when strictNullChecks is false

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