116 lines
5.4 KiB
TypeScript
116 lines
5.4 KiB
TypeScript
//// [taggedTemplateStringsWithOverloadResolution3.ts]
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// Ambiguous call picks the first overload in declaration order
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function fn1(strs: TemplateStringsArray, s: string): string;
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function fn1(strs: TemplateStringsArray, n: number): number;
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function fn1() { return null; }
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var s: string = fn1 `${ undefined }`;
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// No candidate overloads found
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fn1 `${ {} }`; // Error
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function fn2(strs: TemplateStringsArray, s: string, n: number): number;
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function fn2<T>(strs: TemplateStringsArray, n: number, t: T): T;
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function fn2() { return undefined; }
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var d1: Date = fn2 `${ 0 }${ undefined }`; // contextually typed
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var d2 = fn2 `${ 0 }${ undefined }`; // any
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d1.foo(); // error
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d2(); // no error (typed as any)
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// Generic and non-generic overload where generic overload is the only candidate
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fn2 `${ 0 }${ '' }`; // OK
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// Generic and non-generic overload where non-generic overload is the only candidate
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fn2 `${ '' }${ 0 }`; // OK
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// Generic overloads with differing arity
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function fn3<T>(strs: TemplateStringsArray, n: T): string;
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function fn3<T, U>(strs: TemplateStringsArray, s: string, t: T, u: U): U;
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function fn3<T, U, V>(strs: TemplateStringsArray, v: V, u: U, t: T): number;
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function fn3() { return null; }
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var s = fn3 `${ 3 }`;
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var s = fn3 `${'' }${ 3 }${ '' }`;
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var n = fn3 `${ 5 }${ 5 }${ 5 }`;
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var n: number;
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// Generic overloads with differing arity tagging with arguments matching each overload type parameter count
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var s = fn3 `${ 4 }`
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var s = fn3 `${ '' }${ '' }${ '' }`;
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var n = fn3 `${ '' }${ '' }${ 3 }`;
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// Generic overloads with differing arity tagging with argument count that doesn't match any overload
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fn3 ``; // Error
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// Generic overloads with constraints
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function fn4<T extends string, U extends number>(strs: TemplateStringsArray, n: T, m: U);
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function fn4<T extends number, U extends string>(strs: TemplateStringsArray, n: T, m: U);
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function fn4(strs: TemplateStringsArray)
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function fn4() { }
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// Generic overloads with constraints tagged with types that satisfy the constraints
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fn4 `${ '' }${ 3 }`;
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fn4 `${ 3 }${ '' }`;
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fn4 `${ 3 }${ undefined }`;
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fn4 `${ '' }${ null }`;
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// Generic overloads with constraints called with type arguments that do not satisfy the constraints
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fn4 `${ null }${ null }`; // Error
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// Generic overloads with constraints called without type arguments but with types that do not satisfy the constraints
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fn4 `${ true }${ null }`;
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fn4 `${ null }${ true }`;
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// Non - generic overloads where contextual typing of function arguments has errors
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function fn5(strs: TemplateStringsArray, f: (n: string) => void): string;
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function fn5(strs: TemplateStringsArray, f: (n: number) => void): number;
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function fn5() { return undefined; }
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fn5 `${ (n) => n.toFixed() }`; // will error; 'n' should have type 'string'.
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fn5 `${ (n) => n.substr(0) }`;
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//// [taggedTemplateStringsWithOverloadResolution3.js]
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function fn1() { return null; }
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var s = (_a = ["", ""], _a.raw = ["", ""], fn1(_a, undefined));
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// No candidate overloads found
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(_b = ["", ""], _b.raw = ["", ""], fn1(_b, {})); // Error
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function fn2() { return undefined; }
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var d1 = (_c = ["", "", ""], _c.raw = ["", "", ""], fn2(_c, 0, undefined)); // contextually typed
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var d2 = (_d = ["", "", ""], _d.raw = ["", "", ""], fn2(_d, 0, undefined)); // any
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d1.foo(); // error
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d2(); // no error (typed as any)
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// Generic and non-generic overload where generic overload is the only candidate
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(_e = ["", "", ""], _e.raw = ["", "", ""], fn2(_e, 0, '')); // OK
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// Generic and non-generic overload where non-generic overload is the only candidate
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(_f = ["", "", ""], _f.raw = ["", "", ""], fn2(_f, '', 0)); // OK
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function fn3() { return null; }
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var s = (_g = ["", ""], _g.raw = ["", ""], fn3(_g, 3));
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var s = (_h = ["", "", "", ""], _h.raw = ["", "", "", ""], fn3(_h, '', 3, ''));
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var n = (_j = ["", "", "", ""], _j.raw = ["", "", "", ""], fn3(_j, 5, 5, 5));
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var n;
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// Generic overloads with differing arity tagging with arguments matching each overload type parameter count
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var s = (_k = ["", ""], _k.raw = ["", ""], fn3(_k, 4));
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var s = (_l = ["", "", "", ""], _l.raw = ["", "", "", ""], fn3(_l, '', '', ''));
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var n = (_m = ["", "", "", ""], _m.raw = ["", "", "", ""], fn3(_m, '', '', 3));
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// Generic overloads with differing arity tagging with argument count that doesn't match any overload
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(_o = [""], _o.raw = [""], fn3(_o)); // Error
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function fn4() { }
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// Generic overloads with constraints tagged with types that satisfy the constraints
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(_p = ["", "", ""], _p.raw = ["", "", ""], fn4(_p, '', 3));
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(_q = ["", "", ""], _q.raw = ["", "", ""], fn4(_q, 3, ''));
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(_r = ["", "", ""], _r.raw = ["", "", ""], fn4(_r, 3, undefined));
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(_s = ["", "", ""], _s.raw = ["", "", ""], fn4(_s, '', null));
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// Generic overloads with constraints called with type arguments that do not satisfy the constraints
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(_t = ["", "", ""], _t.raw = ["", "", ""], fn4(_t, null, null)); // Error
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// Generic overloads with constraints called without type arguments but with types that do not satisfy the constraints
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(_u = ["", "", ""], _u.raw = ["", "", ""], fn4(_u, true, null));
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(_v = ["", "", ""], _v.raw = ["", "", ""], fn4(_v, null, true));
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function fn5() { return undefined; }
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(_w = ["", ""], _w.raw = ["", ""], fn5(_w, function (n) { return n.toFixed(); })); // will error; 'n' should have type 'string'.
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(_x = ["", ""], _x.raw = ["", ""], fn5(_x, function (n) { return n.substr(0); }));
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var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t, _u, _v, _w, _x;
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