parent
203a5ce78f
commit
517f32940a
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@ -0,0 +1,19 @@
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//// [conditionalEqualityTestingNullability.ts]
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export type Equals<A1 extends any, A2 extends any> =
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(<A>() => A extends A1 ? 1 : 0) extends (<A>() => A extends A2 ? 1 : 0)
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? 1
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: 0
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interface Foo<T> {
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x : () => T
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}
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declare const a: Foo<Date>;
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declare const b: Foo<Date | null>;
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//Expected 0, Actual 1
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type ShouldBe0 = Equals<typeof a, typeof b>;
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//// [conditionalEqualityTestingNullability.js]
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"use strict";
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exports.__esModule = true;
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=== tests/cases/compiler/conditionalEqualityTestingNullability.ts ===
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export type Equals<A1 extends any, A2 extends any> =
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>Equals : Symbol(Equals, Decl(conditionalEqualityTestingNullability.ts, 0, 0))
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>A1 : Symbol(A1, Decl(conditionalEqualityTestingNullability.ts, 0, 19))
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>A2 : Symbol(A2, Decl(conditionalEqualityTestingNullability.ts, 0, 34))
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(<A>() => A extends A1 ? 1 : 0) extends (<A>() => A extends A2 ? 1 : 0)
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>A : Symbol(A, Decl(conditionalEqualityTestingNullability.ts, 1, 6))
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>A : Symbol(A, Decl(conditionalEqualityTestingNullability.ts, 1, 6))
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>A1 : Symbol(A1, Decl(conditionalEqualityTestingNullability.ts, 0, 19))
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>A : Symbol(A, Decl(conditionalEqualityTestingNullability.ts, 1, 46))
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>A : Symbol(A, Decl(conditionalEqualityTestingNullability.ts, 1, 46))
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>A2 : Symbol(A2, Decl(conditionalEqualityTestingNullability.ts, 0, 34))
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? 1
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: 0
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interface Foo<T> {
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>Foo : Symbol(Foo, Decl(conditionalEqualityTestingNullability.ts, 3, 7))
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>T : Symbol(T, Decl(conditionalEqualityTestingNullability.ts, 5, 14))
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x : () => T
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>x : Symbol(Foo.x, Decl(conditionalEqualityTestingNullability.ts, 5, 18))
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>T : Symbol(T, Decl(conditionalEqualityTestingNullability.ts, 5, 14))
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}
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declare const a: Foo<Date>;
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>a : Symbol(a, Decl(conditionalEqualityTestingNullability.ts, 9, 13))
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>Foo : Symbol(Foo, Decl(conditionalEqualityTestingNullability.ts, 3, 7))
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>Date : Symbol(Date, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.scripthost.d.ts, --, --))
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declare const b: Foo<Date | null>;
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>b : Symbol(b, Decl(conditionalEqualityTestingNullability.ts, 10, 13))
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>Foo : Symbol(Foo, Decl(conditionalEqualityTestingNullability.ts, 3, 7))
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>Date : Symbol(Date, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.scripthost.d.ts, --, --))
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//Expected 0, Actual 1
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type ShouldBe0 = Equals<typeof a, typeof b>;
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>ShouldBe0 : Symbol(ShouldBe0, Decl(conditionalEqualityTestingNullability.ts, 10, 34))
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>Equals : Symbol(Equals, Decl(conditionalEqualityTestingNullability.ts, 0, 0))
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>a : Symbol(a, Decl(conditionalEqualityTestingNullability.ts, 9, 13))
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>b : Symbol(b, Decl(conditionalEqualityTestingNullability.ts, 10, 13))
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@ -0,0 +1,26 @@
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=== tests/cases/compiler/conditionalEqualityTestingNullability.ts ===
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export type Equals<A1 extends any, A2 extends any> =
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>Equals : Equals<A1, A2>
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(<A>() => A extends A1 ? 1 : 0) extends (<A>() => A extends A2 ? 1 : 0)
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? 1
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: 0
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interface Foo<T> {
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x : () => T
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>x : () => T
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}
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declare const a: Foo<Date>;
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>a : Foo<Date>
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declare const b: Foo<Date | null>;
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>b : Foo<Date | null>
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>null : null
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//Expected 0, Actual 1
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type ShouldBe0 = Equals<typeof a, typeof b>;
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>ShouldBe0 : 0
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>a : Foo<Date>
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>b : Foo<Date | null>
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@ -0,0 +1,15 @@
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// @strict: true
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export type Equals<A1 extends any, A2 extends any> =
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(<A>() => A extends A1 ? 1 : 0) extends (<A>() => A extends A2 ? 1 : 0)
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? 1
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: 0
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interface Foo<T> {
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x : () => T
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}
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declare const a: Foo<Date>;
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declare const b: Foo<Date | null>;
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//Expected 0, Actual 1
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type ShouldBe0 = Equals<typeof a, typeof b>;
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Reference in a new issue