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.
95 lines
2.5 KiB
Plaintext
95 lines
2.5 KiB
Plaintext
=== tests/cases/conformance/types/intersection/intersectionWithUnionConstraint.ts ===
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function f1<T extends string | number, U extends string | number>(x: T & U) {
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>f1 : <T extends string | number, U extends string | number>(x: T & U) => void
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>x : T & U
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// Combined constraint of 'T & U' is 'string | number'
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let y: string | number = x;
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>y : string | number
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>x : T & U
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}
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function f2<T extends string | number | undefined, U extends string | null | undefined>(x: T & U) {
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>f2 : <T extends string | number | undefined, U extends string | null | undefined>(x: T & U) => void
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>null : null
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>x : T & U
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let y1: string | number = x; // Error
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>y1 : string | number
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>x : T & U
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let y2: string | null = x; // Error
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>y2 : string | null
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>null : null
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>x : T & U
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let y3: string | undefined = x;
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>y3 : string | undefined
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>x : T & U
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let y4: number | null = x; // Error
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>y4 : number | null
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>null : null
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>x : T & U
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let y5: number | undefined = x; // Error
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>y5 : number | undefined
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>x : T & U
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let y6: null | undefined = x; // Error
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>y6 : null | undefined
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>null : null
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>x : T & U
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}
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type T1 = (string | number | undefined) & (string | null | undefined); // string | undefined
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>T1 : string | undefined
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>null : null
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function f3<T extends string | number | undefined>(x: T & (number | object | undefined)) {
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>f3 : <T extends string | number | undefined>(x: T & (number | object | undefined)) => void
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>x : T & (number | object | undefined)
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const y: number | undefined = x;
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>y : number | undefined
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>x : T & (number | object | undefined)
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}
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function f4<T extends string | number>(x: T & (number | object)) {
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>f4 : <T extends string | number>(x: T & (number | object)) => void
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>x : T & (number | object)
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const y: number = x;
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>y : number
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>x : T & (number | object)
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}
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function f5<T, U extends keyof T>(x: keyof T & U) {
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>f5 : <T, U extends keyof T>(x: keyof T & U) => void
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>x : keyof T & U
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let y: keyof any = x;
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>y : string | number | symbol
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>x : keyof T & U
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}
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// Repro from #23648
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type Example<T, U> = { [K in keyof T]: K extends keyof U ? UnexpectedError<K> : NoErrorHere<K> }
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>Example : Example<T, U>
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type UnexpectedError<T extends PropertyKey> = T
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>UnexpectedError : T
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type NoErrorHere<T extends PropertyKey> = T
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>NoErrorHere : T
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// Repro from #30331
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type a<T> = T extends Array<infer U> ? U : never;
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>a : a<T>
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type b<T> = { [K in a<T> & keyof T ]: 42 };
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>b : b<T>
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