133 lines
10 KiB
Plaintext
133 lines
10 KiB
Plaintext
=== tests/cases/conformance/types/typeRelationships/typeInference/contextualSignatureInstantiation.ts ===
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// TypeScript Spec, section 4.12.2:
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// If e is an expression of a function type that contains exactly one generic call signature and no other members,
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// and T is a function type with exactly one non - generic call signature and no other members, then any inferences
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// made for type parameters referenced by the parameters of T's call signature are fixed, and e's type is changed
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// to a function type with e's call signature instantiated in the context of T's call signature (section 3.8.5).
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declare function foo<T>(cb: (x: number, y: string) => T): T;
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>foo : Symbol(foo, Decl(contextualSignatureInstantiation.ts, 0, 0))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 6, 21))
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>cb : Symbol(cb, Decl(contextualSignatureInstantiation.ts, 6, 24))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 6, 29))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 6, 39))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 6, 21))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 6, 21))
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declare function bar<T, U, V>(x: T, y: U, cb: (x: T, y: U) => V): V;
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 7, 21))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 7, 23))
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>V : Symbol(V, Decl(contextualSignatureInstantiation.ts, 7, 26))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 7, 30))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 7, 21))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 7, 35))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 7, 23))
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>cb : Symbol(cb, Decl(contextualSignatureInstantiation.ts, 7, 41))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 7, 47))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 7, 21))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 7, 52))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 7, 23))
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>V : Symbol(V, Decl(contextualSignatureInstantiation.ts, 7, 26))
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>V : Symbol(V, Decl(contextualSignatureInstantiation.ts, 7, 26))
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declare function baz<T, U>(x: T, y: T, cb: (x: T, y: T) => U): U;
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>baz : Symbol(baz, Decl(contextualSignatureInstantiation.ts, 7, 68))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 8, 21))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 8, 23))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 8, 27))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 8, 21))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 8, 32))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 8, 21))
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>cb : Symbol(cb, Decl(contextualSignatureInstantiation.ts, 8, 38))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 8, 44))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 8, 21))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 8, 49))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 8, 21))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 8, 23))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 8, 23))
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declare function g<T>(x: T, y: T): T;
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 10, 19))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 10, 22))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 10, 19))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 10, 27))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 10, 19))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 10, 19))
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declare function h<T, U>(x: T, y: U): T[] | U[];
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>h : Symbol(h, Decl(contextualSignatureInstantiation.ts, 10, 37))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 11, 19))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 11, 21))
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>x : Symbol(x, Decl(contextualSignatureInstantiation.ts, 11, 25))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 11, 19))
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>y : Symbol(y, Decl(contextualSignatureInstantiation.ts, 11, 30))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 11, 21))
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>T : Symbol(T, Decl(contextualSignatureInstantiation.ts, 11, 19))
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>U : Symbol(U, Decl(contextualSignatureInstantiation.ts, 11, 21))
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var a: number;
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>a : Symbol(a, Decl(contextualSignatureInstantiation.ts, 13, 3), Decl(contextualSignatureInstantiation.ts, 14, 3), Decl(contextualSignatureInstantiation.ts, 15, 3))
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var a = bar(1, 1, g); // Should be number
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>a : Symbol(a, Decl(contextualSignatureInstantiation.ts, 13, 3), Decl(contextualSignatureInstantiation.ts, 14, 3), Decl(contextualSignatureInstantiation.ts, 15, 3))
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var a = baz(1, 1, g); // Should be number
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>a : Symbol(a, Decl(contextualSignatureInstantiation.ts, 13, 3), Decl(contextualSignatureInstantiation.ts, 14, 3), Decl(contextualSignatureInstantiation.ts, 15, 3))
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>baz : Symbol(baz, Decl(contextualSignatureInstantiation.ts, 7, 68))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var b: number | string;
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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var b = foo(g); // Should be number | string
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>foo : Symbol(foo, Decl(contextualSignatureInstantiation.ts, 0, 0))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var b = bar(1, "one", g); // Should be number | string
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var b = bar("one", 1, g); // Should be number | string
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var b = baz(b, b, g); // Should be number | string
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>baz : Symbol(baz, Decl(contextualSignatureInstantiation.ts, 7, 68))
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>b : Symbol(b, Decl(contextualSignatureInstantiation.ts, 17, 3), Decl(contextualSignatureInstantiation.ts, 18, 3), Decl(contextualSignatureInstantiation.ts, 19, 3), Decl(contextualSignatureInstantiation.ts, 20, 3), Decl(contextualSignatureInstantiation.ts, 21, 3))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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var d: number[] | string[];
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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var d = foo(h); // Should be number[] | string[]
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>foo : Symbol(foo, Decl(contextualSignatureInstantiation.ts, 0, 0))
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>h : Symbol(h, Decl(contextualSignatureInstantiation.ts, 10, 37))
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var d = bar(1, "one", h); // Should be number[] | string[]
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>h : Symbol(h, Decl(contextualSignatureInstantiation.ts, 10, 37))
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var d = bar("one", 1, h); // Should be number[] | string[]
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>bar : Symbol(bar, Decl(contextualSignatureInstantiation.ts, 6, 60))
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>h : Symbol(h, Decl(contextualSignatureInstantiation.ts, 10, 37))
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var d = baz(d, d, g); // Should be number[] | string[]
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>baz : Symbol(baz, Decl(contextualSignatureInstantiation.ts, 7, 68))
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>d : Symbol(d, Decl(contextualSignatureInstantiation.ts, 23, 3), Decl(contextualSignatureInstantiation.ts, 24, 3), Decl(contextualSignatureInstantiation.ts, 25, 3), Decl(contextualSignatureInstantiation.ts, 26, 3), Decl(contextualSignatureInstantiation.ts, 27, 3))
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>g : Symbol(g, Decl(contextualSignatureInstantiation.ts, 8, 65))
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