Conformance test for update spec section 4.9.3 contextual typing in function expression #2761
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| //// [functionExpressionContextualTyping1.ts] | ||
| enum E { red, blue } | ||
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| var g0: (n: number, s:string) => number; | ||
| var g: ((s: string, w: boolean) => void) | ((n: number) => number); | ||
| var g1: ((s: string, w: boolean) => void) | ((s: string, w: number) => string); | ||
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| g1 = (j, m) => { } // Per spec, no contextual signature can be extracted in this case. | ||
| g = (k, h=true) => { k.toLowerCase() }; | ||
| g = (k) => { k.toLowerCase() }; | ||
| g = (i) => { | ||
| i.toExponential(); | ||
| return i; | ||
| }; // Per spec, no contextual signature can be extracted in this case. | ||
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| var h: ((s: string, w: boolean) => void) | ((s: string, w: boolean) => string); | ||
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Member
There was a problem hiding this comment. Explain that here a signature can be extracted and why.
Member
There was a problem hiding this comment. For the record, you can just copy/paste sections of the spec to explain what's happening, and you should feel free to. |
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| h = (k, h) => { }; | ||
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| var i: typeof g0 | ((n: number, s: string) => string); | ||
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Member
There was a problem hiding this comment. You don't actually use
Member
There was a problem hiding this comment. Oh, you mean to test this case out. At least move the declaration locally and name it something separate from |
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| i = (foo, bar) => { return foo + 1; } | ||
| i = (foo, bar) => { return "hello"; } | ||
| var j: (name: string, num: number, boo: boolean) => void; | ||
| j = (name, number) => { }; | ||
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| var k: (n: E) => string = (number = 1) => { return "hello"; }; | ||
| var k1: (n: {}) => string = (number = 1) => { return "hello"; }; | ||
| class C<T, U> { | ||
| constructor() { | ||
| var k: ((j: T, k: U) => (T|U)[]) | ((j: number,k :U) => number[]) = (j, k) => { | ||
| return [j, k]; | ||
| } // Per spec, no contextual signature can be extracted in this case. | ||
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Member
There was a problem hiding this comment. Mentioning "per spec" doesn't really buy much since this is a conformance test - it should be per spec. Again, mentioning what part of the spec it refers to is more helpful. |
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| } | ||
| } | ||
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| //// [functionExpressionContextualTyping1.js] | ||
| var E; | ||
| (function (E) { | ||
| E[E["red"] = 0] = "red"; | ||
| E[E["blue"] = 1] = "blue"; | ||
| })(E || (E = {})); | ||
| var g0; | ||
| var g; | ||
| var g1; | ||
| g1 = function (j, m) { }; // Per spec, no contextual signature can be extracted in this case. | ||
| g = function (k, h) { | ||
| if (h === void 0) { h = true; } | ||
| k.toLowerCase(); | ||
| }; | ||
| g = function (k) { k.toLowerCase(); }; | ||
| g = function (i) { | ||
| i.toExponential(); | ||
| return i; | ||
| }; // Per spec, no contextual signature can be extracted in this case. | ||
| var h; | ||
| h = function (k, h) { }; | ||
| var i; | ||
| i = function (foo, bar) { return foo + 1; }; | ||
| i = function (foo, bar) { return "hello"; }; | ||
| var j; | ||
| j = function (name, number) { }; | ||
| var k = function (number) { | ||
| if (number === void 0) { number = 1; } | ||
| return "hello"; | ||
| }; | ||
| var k1 = function (number) { | ||
| if (number === void 0) { number = 1; } | ||
| return "hello"; | ||
| }; | ||
| var C = (function () { | ||
| function C() { | ||
| var k = function (j, k) { | ||
| return [j, k]; | ||
| }; // Per spec, no contextual signature can be extracted in this case. | ||
| } | ||
| return C; | ||
| })(); | ||
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| === tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping1.ts === | ||
| enum E { red, blue } | ||
| >E : E, Symbol(E, Decl(functionExpressionContextualTyping1.ts, 0, 0)) | ||
| >red : E, Symbol(E.red, Decl(functionExpressionContextualTyping1.ts, 0, 8)) | ||
| >blue : E, Symbol(E.blue, Decl(functionExpressionContextualTyping1.ts, 0, 13)) | ||
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| var g0: (n: number, s:string) => number; | ||
| >g0 : (n: number, s: string) => number, Symbol(g0, Decl(functionExpressionContextualTyping1.ts, 2, 3)) | ||
| >n : number, Symbol(n, Decl(functionExpressionContextualTyping1.ts, 2, 9)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 2, 19)) | ||
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| var g: ((s: string, w: boolean) => void) | ((n: number) => number); | ||
| >g : ((s: string, w: boolean) => void) | ((n: number) => number), Symbol(g, Decl(functionExpressionContextualTyping1.ts, 3, 3)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 3, 9)) | ||
| >w : boolean, Symbol(w, Decl(functionExpressionContextualTyping1.ts, 3, 19)) | ||
| >n : number, Symbol(n, Decl(functionExpressionContextualTyping1.ts, 3, 45)) | ||
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| var g1: ((s: string, w: boolean) => void) | ((s: string, w: number) => string); | ||
| >g1 : ((s: string, w: boolean) => void) | ((s: string, w: number) => string), Symbol(g1, Decl(functionExpressionContextualTyping1.ts, 4, 3)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 4, 10)) | ||
| >w : boolean, Symbol(w, Decl(functionExpressionContextualTyping1.ts, 4, 20)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 4, 46)) | ||
| >w : number, Symbol(w, Decl(functionExpressionContextualTyping1.ts, 4, 56)) | ||
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| g1 = (j, m) => { } // Per spec, no contextual signature can be extracted in this case. | ||
| >g1 = (j, m) => { } : (j: any, m: any) => void | ||
| >g1 : ((s: string, w: boolean) => void) | ((s: string, w: number) => string), Symbol(g1, Decl(functionExpressionContextualTyping1.ts, 4, 3)) | ||
| >(j, m) => { } : (j: any, m: any) => void | ||
| >j : any, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 6, 6)) | ||
| >m : any, Symbol(m, Decl(functionExpressionContextualTyping1.ts, 6, 8)) | ||
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| g = (k, h=true) => { k.toLowerCase() }; | ||
| >g = (k, h=true) => { k.toLowerCase() } : (k: any, h?: boolean) => void | ||
| >g : ((s: string, w: boolean) => void) | ((n: number) => number), Symbol(g, Decl(functionExpressionContextualTyping1.ts, 3, 3)) | ||
| >(k, h=true) => { k.toLowerCase() } : (k: any, h?: boolean) => void | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 7, 5)) | ||
| >h : boolean, Symbol(h, Decl(functionExpressionContextualTyping1.ts, 7, 7)) | ||
| >true : boolean | ||
| >k.toLowerCase() : any | ||
| >k.toLowerCase : any | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 7, 5)) | ||
| >toLowerCase : any | ||
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| g = (k) => { k.toLowerCase() }; | ||
| >g = (k) => { k.toLowerCase() } : (k: any) => void | ||
| >g : ((s: string, w: boolean) => void) | ((n: number) => number), Symbol(g, Decl(functionExpressionContextualTyping1.ts, 3, 3)) | ||
| >(k) => { k.toLowerCase() } : (k: any) => void | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 8, 5)) | ||
| >k.toLowerCase() : any | ||
| >k.toLowerCase : any | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 8, 5)) | ||
| >toLowerCase : any | ||
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| g = (i) => { | ||
| >g = (i) => { i.toExponential(); return i;} : (i: any) => any | ||
| >g : ((s: string, w: boolean) => void) | ((n: number) => number), Symbol(g, Decl(functionExpressionContextualTyping1.ts, 3, 3)) | ||
| >(i) => { i.toExponential(); return i;} : (i: any) => any | ||
| >i : any, Symbol(i, Decl(functionExpressionContextualTyping1.ts, 9, 5)) | ||
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| i.toExponential(); | ||
| >i.toExponential() : any | ||
| >i.toExponential : any | ||
| >i : any, Symbol(i, Decl(functionExpressionContextualTyping1.ts, 9, 5)) | ||
| >toExponential : any | ||
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| return i; | ||
| >i : any, Symbol(i, Decl(functionExpressionContextualTyping1.ts, 9, 5)) | ||
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| }; // Per spec, no contextual signature can be extracted in this case. | ||
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| var h: ((s: string, w: boolean) => void) | ((s: string, w: boolean) => string); | ||
| >h : ((s: string, w: boolean) => void) | ((s: string, w: boolean) => string), Symbol(h, Decl(functionExpressionContextualTyping1.ts, 14, 3)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 14, 9)) | ||
| >w : boolean, Symbol(w, Decl(functionExpressionContextualTyping1.ts, 14, 19)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 14, 45)) | ||
| >w : boolean, Symbol(w, Decl(functionExpressionContextualTyping1.ts, 14, 55)) | ||
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| h = (k, h) => { }; | ||
| >h = (k, h) => { } : (k: string, h: boolean) => void | ||
| >h : ((s: string, w: boolean) => void) | ((s: string, w: boolean) => string), Symbol(h, Decl(functionExpressionContextualTyping1.ts, 14, 3)) | ||
| >(k, h) => { } : (k: string, h: boolean) => void | ||
| >k : string, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 15, 5)) | ||
| >h : boolean, Symbol(h, Decl(functionExpressionContextualTyping1.ts, 15, 7)) | ||
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| var i: typeof g0 | ((n: number, s: string) => string); | ||
| >i : ((n: number, s: string) => number) | ((n: number, s: string) => string), Symbol(i, Decl(functionExpressionContextualTyping1.ts, 17, 3)) | ||
| >g0 : (n: number, s: string) => number, Symbol(g0, Decl(functionExpressionContextualTyping1.ts, 2, 3)) | ||
| >n : number, Symbol(n, Decl(functionExpressionContextualTyping1.ts, 17, 21)) | ||
| >s : string, Symbol(s, Decl(functionExpressionContextualTyping1.ts, 17, 31)) | ||
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| i = (foo, bar) => { return foo + 1; } | ||
| >i = (foo, bar) => { return foo + 1; } : (foo: number, bar: string) => number | ||
| >i : ((n: number, s: string) => number) | ((n: number, s: string) => string), Symbol(i, Decl(functionExpressionContextualTyping1.ts, 17, 3)) | ||
| >(foo, bar) => { return foo + 1; } : (foo: number, bar: string) => number | ||
| >foo : number, Symbol(foo, Decl(functionExpressionContextualTyping1.ts, 18, 5)) | ||
| >bar : string, Symbol(bar, Decl(functionExpressionContextualTyping1.ts, 18, 9)) | ||
| >foo + 1 : number | ||
| >foo : number, Symbol(foo, Decl(functionExpressionContextualTyping1.ts, 18, 5)) | ||
| >1 : number | ||
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| i = (foo, bar) => { return "hello"; } | ||
| >i = (foo, bar) => { return "hello"; } : (foo: number, bar: string) => string | ||
| >i : ((n: number, s: string) => number) | ((n: number, s: string) => string), Symbol(i, Decl(functionExpressionContextualTyping1.ts, 17, 3)) | ||
| >(foo, bar) => { return "hello"; } : (foo: number, bar: string) => string | ||
| >foo : number, Symbol(foo, Decl(functionExpressionContextualTyping1.ts, 19, 5)) | ||
| >bar : string, Symbol(bar, Decl(functionExpressionContextualTyping1.ts, 19, 9)) | ||
| >"hello" : string | ||
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| var j: (name: string, num: number, boo: boolean) => void; | ||
| >j : (name: string, num: number, boo: boolean) => void, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 20, 3)) | ||
| >name : string, Symbol(name, Decl(functionExpressionContextualTyping1.ts, 20, 8)) | ||
| >num : number, Symbol(num, Decl(functionExpressionContextualTyping1.ts, 20, 21)) | ||
| >boo : boolean, Symbol(boo, Decl(functionExpressionContextualTyping1.ts, 20, 34)) | ||
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| j = (name, number) => { }; | ||
| >j = (name, number) => { } : (name: string, number: number) => void | ||
| >j : (name: string, num: number, boo: boolean) => void, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 20, 3)) | ||
| >(name, number) => { } : (name: string, number: number) => void | ||
| >name : string, Symbol(name, Decl(functionExpressionContextualTyping1.ts, 21, 5)) | ||
| >number : number, Symbol(number, Decl(functionExpressionContextualTyping1.ts, 21, 10)) | ||
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| var k: (n: E) => string = (number = 1) => { return "hello"; }; | ||
| >k : (n: E) => string, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 23, 3)) | ||
| >n : E, Symbol(n, Decl(functionExpressionContextualTyping1.ts, 23, 8)) | ||
| >E : E, Symbol(E, Decl(functionExpressionContextualTyping1.ts, 0, 0)) | ||
| >(number = 1) => { return "hello"; } : (number?: E) => string | ||
| >number : E, Symbol(number, Decl(functionExpressionContextualTyping1.ts, 23, 27)) | ||
| >1 : number | ||
| >"hello" : string | ||
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| var k1: (n: {}) => string = (number = 1) => { return "hello"; }; | ||
| >k1 : (n: {}) => string, Symbol(k1, Decl(functionExpressionContextualTyping1.ts, 24, 3)) | ||
| >n : {}, Symbol(n, Decl(functionExpressionContextualTyping1.ts, 24, 9)) | ||
| >(number = 1) => { return "hello"; } : (number?: {}) => string | ||
| >number : {}, Symbol(number, Decl(functionExpressionContextualTyping1.ts, 24, 29)) | ||
| >1 : number | ||
| >"hello" : string | ||
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| class C<T, U> { | ||
| >C : C<T, U>, Symbol(C, Decl(functionExpressionContextualTyping1.ts, 24, 64)) | ||
| >T : T, Symbol(T, Decl(functionExpressionContextualTyping1.ts, 25, 8)) | ||
| >U : U, Symbol(U, Decl(functionExpressionContextualTyping1.ts, 25, 10)) | ||
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| constructor() { | ||
| var k: ((j: T, k: U) => (T|U)[]) | ((j: number,k :U) => number[]) = (j, k) => { | ||
| >k : ((j: T, k: U) => (T | U)[]) | ((j: number, k: U) => number[]), Symbol(k, Decl(functionExpressionContextualTyping1.ts, 27, 11)) | ||
| >j : T, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 27, 17)) | ||
| >T : T, Symbol(T, Decl(functionExpressionContextualTyping1.ts, 25, 8)) | ||
| >k : U, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 27, 22)) | ||
| >U : U, Symbol(U, Decl(functionExpressionContextualTyping1.ts, 25, 10)) | ||
| >T : T, Symbol(T, Decl(functionExpressionContextualTyping1.ts, 25, 8)) | ||
| >U : U, Symbol(U, Decl(functionExpressionContextualTyping1.ts, 25, 10)) | ||
| >j : number, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 27, 45)) | ||
| >k : U, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 27, 55)) | ||
| >U : U, Symbol(U, Decl(functionExpressionContextualTyping1.ts, 25, 10)) | ||
| >(j, k) => { return [j, k]; } : (j: any, k: any) => any[] | ||
| >j : any, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 27, 77)) | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 27, 79)) | ||
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| return [j, k]; | ||
| >[j, k] : any[] | ||
| >j : any, Symbol(j, Decl(functionExpressionContextualTyping1.ts, 27, 77)) | ||
| >k : any, Symbol(k, Decl(functionExpressionContextualTyping1.ts, 27, 79)) | ||
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| } // Per spec, no contextual signature can be extracted in this case. | ||
| } | ||
| } |
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| @@ -0,0 +1,36 @@ | ||
| tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts(3,1): error TS2322: Type '(foo: number, bar: string) => boolean' is not assignable to type '((n: number, s: string) => number) | ((n: number, s: string) => string)'. | ||
| Type '(foo: number, bar: string) => boolean' is not assignable to type '(n: number, s: string) => string'. | ||
| Type 'boolean' is not assignable to type 'string'. | ||
| tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts(5,7): error TS2300: Duplicate identifier 'C'. | ||
| tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts(8,7): error TS2300: Duplicate identifier 'C'. | ||
| tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts(10,43): error TS2322: Type 'number' is not assignable to type 'T'. | ||
| tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts(10,50): error TS2322: Type 'number' is not assignable to type 'U'. | ||
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| ==== tests/cases/conformance/expressions/contextualTyping/functionExpressionContextualTyping2.ts (5 errors) ==== | ||
| var g0: (n: number, s: string) => number | ||
| var i: typeof g0 | ((n: number, s: string) => string); | ||
| i = (foo, bar) => { return true; } | ||
| ~ | ||
| !!! error TS2322: Type '(foo: number, bar: string) => boolean' is not assignable to type '((n: number, s: string) => number) | ((n: number, s: string) => string)'. | ||
| !!! error TS2322: Type '(foo: number, bar: string) => boolean' is not assignable to type '(n: number, s: string) => string'. | ||
| !!! error TS2322: Type 'boolean' is not assignable to type 'string'. | ||
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| class C<T> { } | ||
| ~ | ||
| !!! error TS2300: Duplicate identifier 'C'. | ||
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| var j: (c: C<Number>) => number = (j) => { return 1; } | ||
| class C<T, U> { | ||
| ~ | ||
| !!! error TS2300: Duplicate identifier 'C'. | ||
| constructor() { | ||
| var k: (j: T, k: U) => (T|U)[] = (j = 1, k = 0) => { | ||
| ~~~~~ | ||
| !!! error TS2322: Type 'number' is not assignable to type 'T'. | ||
| ~~~~~ | ||
| !!! error TS2322: Type 'number' is not assignable to type 'U'. | ||
| return [j, k]; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| //// [functionExpressionContextualTyping2.ts] | ||
| var g0: (n: number, s: string) => number | ||
| var i: typeof g0 | ((n: number, s: string) => string); | ||
| i = (foo, bar) => { return true; } | ||
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| class C<T> { } | ||
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| var j: (c: C<Number>) => number = (j) => { return 1; } | ||
| class C<T, U> { | ||
| constructor() { | ||
| var k: (j: T, k: U) => (T|U)[] = (j = 1, k = 0) => { | ||
| return [j, k]; | ||
| } | ||
| } | ||
| } | ||
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| //// [functionExpressionContextualTyping2.js] | ||
| var g0; | ||
| var i; | ||
| i = function (foo, bar) { return true; }; | ||
| var C = (function () { | ||
| function C() { | ||
| } | ||
| return C; | ||
| })(); | ||
| var j = function (j) { return 1; }; | ||
| var C = (function () { | ||
| function C() { | ||
| var k = function (j, k) { | ||
| if (j === void 0) { j = 1; } | ||
| if (k === void 0) { k = 0; } | ||
| return [j, k]; | ||
| }; | ||
| } | ||
| return C; | ||
| })(); |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,32 @@ | ||
| enum E { red, blue } | ||
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| var g0: (n: number, s:string) => number; | ||
| var g: ((s: string, w: boolean) => void) | ((n: number) => number); | ||
| var g1: ((s: string, w: boolean) => void) | ((s: string, w: number) => string); | ||
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| g1 = (j, m) => { } // Per spec, no contextual signature can be extracted in this case. | ||
| g = (k, h=true) => { k.toLowerCase() }; | ||
| g = (k) => { k.toLowerCase() }; | ||
| g = (i) => { | ||
| i.toExponential(); | ||
| return i; | ||
| }; // Per spec, no contextual signature can be extracted in this case. | ||
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| var h: ((s: string, w: boolean) => void) | ((s: string, w: boolean) => string); | ||
| h = (k, h) => { }; | ||
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| var i: typeof g0 | ((n: number, s: string) => string); | ||
| i = (foo, bar) => { return foo + 1; } | ||
| i = (foo, bar) => { return "hello"; } | ||
| var j: (name: string, num: number, boo: boolean) => void; | ||
| j = (name, number) => { }; | ||
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| var k: (n: E) => string = (number = 1) => { return "hello"; }; | ||
| var k1: (n: {}) => string = (number = 1) => { return "hello"; }; | ||
| class C<T, U> { | ||
| constructor() { | ||
| var k: ((j: T, k: U) => (T|U)[]) | ((j: number,k :U) => number[]) = (j, k) => { | ||
| return [j, k]; | ||
| } // Per spec, no contextual signature can be extracted in this case. | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| var g0: (n: number, s: string) => number | ||
| var i: typeof g0 | ((n: number, s: string) => string); | ||
| i = (foo, bar) => { return true; } | ||
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| class C<T> { } | ||
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| var j: (c: C<Number>) => number = (j) => { return 1; } | ||
| class C<T, U> { | ||
| constructor() { | ||
| var k: (j: T, k: U) => (T|U)[] = (j = 1, k = 0) => { | ||
| return [j, k]; | ||
| } | ||
| } | ||
| } | ||
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Explain why no signature can be extracted
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Explain that no signature can be extracted "in the following cases".