6aeb8c12cc
* Create separate types for equivalent aliased unions * Accept new baselines * Preserve original types for union types * Accept new baselines * Preserve intersection origin for union types * Accept new baselines * Accept new baselines * Preserve aliases during relationship checks * Accept new baselines * Preserve aliases for intersection and indexed access types * Accept new baselines * Compute intersection-of-unions cross product without recursion * Accept new baselines * Use denormalized type objects for origin / support 'keyof' origins * Accept new baselines * Fix fourslash test * Recursively extract named union types * Accept new baselines * Map on union origin in mapType to better preserve aliases and origins * Remove redundant call * Accept new baselines * Revert back to declared type when branches produce equivalent union * Accept new baselines * Don't include denormal origin types in regular type statistics * Fix issue with unions not being marked primitive-only * Allow new alias to be associated with type alias instantiation * Accept new baselines * Revert "Accept new baselines" This reverts commit4507270cc1. * Revert "Allow new alias to be associated with type alias instantiation" This reverts commit2c2d06dfe1.
26 lines
975 B
Plaintext
26 lines
975 B
Plaintext
=== tests/cases/compiler/optionalParameterRetainsNull.ts ===
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interface Bar { bar: number; foo: object | null; }
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>bar : number
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>foo : object | null
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>null : null
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let a = {
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>a : { test<K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined): void; }
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>{ test<K extends keyof Bar> (a: K, b?: Bar[K] | null) { }} : { test<K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined): void; }
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test<K extends keyof Bar> (a: K, b?: Bar[K] | null) { }
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>test : <K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined) => void
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>a : K
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>b : Bar[K] | null | undefined
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>null : null
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};
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a.test("bar", null); // ok, null is assignable to number | null | undefined
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>a.test("bar", null) : void
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>a.test : <K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined) => void
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>a : { test<K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined): void; }
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>test : <K extends keyof Bar>(a: K, b?: Bar[K] | null | undefined) => void
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>"bar" : "bar"
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>null : null
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