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