Add tests
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@ -94,9 +94,17 @@ tests/cases/compiler/strictFunctionTypesErrors.ts(134,1): error TS2322: Type '(f
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Types of parameters 'f' and 'f' are incompatible.
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Types of parameters 'x' and 'x' are incompatible.
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Type 'Animal' is not assignable to type 'Dog'.
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tests/cases/compiler/strictFunctionTypesErrors.ts(147,5): error TS2322: Type '(cb: (x: Animal) => Animal) => void' is not assignable to type '(cb: (x: Dog) => Animal) => void'.
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Types of parameters 'cb' and 'cb' are incompatible.
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Types of parameters 'x' and 'x' are incompatible.
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Type 'Animal' is not assignable to type 'Dog'.
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tests/cases/compiler/strictFunctionTypesErrors.ts(155,5): error TS2322: Type '(cb: (x: Animal) => Animal) => void' is not assignable to type '(cb: (x: Dog) => Animal) => void'.
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Types of parameters 'cb' and 'cb' are incompatible.
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Types of parameters 'x' and 'x' are incompatible.
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Type 'Animal' is not assignable to type 'Dog'.
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==== tests/cases/compiler/strictFunctionTypesErrors.ts (33 errors) ====
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==== tests/cases/compiler/strictFunctionTypesErrors.ts (35 errors) ====
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export {}
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@ -360,4 +368,35 @@ tests/cases/compiler/strictFunctionTypesErrors.ts(134,1): error TS2322: Type '(f
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!!! error TS2322: Types of parameters 'f' and 'f' are incompatible.
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!!! error TS2322: Types of parameters 'x' and 'x' are incompatible.
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!!! error TS2322: Type 'Animal' is not assignable to type 'Dog'.
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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namespace n1 {
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class Foo {
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static f1(x: Animal): Animal { throw "wat"; }
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static f2(x: Dog): Animal { throw "wat"; };
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}
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declare let f1: (cb: typeof Foo.f1) => void;
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declare let f2: (cb: typeof Foo.f2) => void;
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f1 = f2;
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f2 = f1; // Error
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~~
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!!! error TS2322: Type '(cb: (x: Animal) => Animal) => void' is not assignable to type '(cb: (x: Dog) => Animal) => void'.
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!!! error TS2322: Types of parameters 'cb' and 'cb' are incompatible.
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!!! error TS2322: Types of parameters 'x' and 'x' are incompatible.
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!!! error TS2322: Type 'Animal' is not assignable to type 'Dog'.
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}
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namespace n2 {
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type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
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declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
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declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
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f1 = f2;
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f2 = f1; // Error
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~~
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!!! error TS2322: Type '(cb: (x: Animal) => Animal) => void' is not assignable to type '(cb: (x: Dog) => Animal) => void'.
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!!! error TS2322: Types of parameters 'cb' and 'cb' are incompatible.
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!!! error TS2322: Types of parameters 'x' and 'x' are incompatible.
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!!! error TS2322: Type 'Animal' is not assignable to type 'Dog'.
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}
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@ -133,7 +133,28 @@ declare let fc1: (f: (x: Animal) => Animal) => void;
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declare let fc2: (f: (x: Dog) => Dog) => void;
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fc1 = fc2; // Error
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fc2 = fc1; // Error
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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namespace n1 {
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class Foo {
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static f1(x: Animal): Animal { throw "wat"; }
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static f2(x: Dog): Animal { throw "wat"; };
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}
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declare let f1: (cb: typeof Foo.f1) => void;
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declare let f2: (cb: typeof Foo.f2) => void;
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f1 = f2;
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f2 = f1; // Error
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}
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namespace n2 {
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type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
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declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
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declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
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f1 = f2;
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f2 = f1; // Error
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}
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//// [strictFunctionTypesErrors.js]
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"use strict";
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@ -195,3 +216,23 @@ animalCrate = dogCrate; // Error
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dogCrate = animalCrate; // Error
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fc1 = fc2; // Error
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fc2 = fc1; // Error
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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var n1;
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(function (n1) {
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var Foo = /** @class */ (function () {
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function Foo() {
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}
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Foo.f1 = function (x) { throw "wat"; };
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Foo.f2 = function (x) { throw "wat"; };
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;
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return Foo;
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}());
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f1 = f2;
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f2 = f1; // Error
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})(n1 || (n1 = {}));
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var n2;
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(function (n2) {
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f1 = f2;
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f2 = f1; // Error
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})(n2 || (n2 = {}));
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@ -424,3 +424,81 @@ fc2 = fc1; // Error
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>fc2 : Symbol(fc2, Decl(strictFunctionTypesErrors.ts, 131, 11))
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>fc1 : Symbol(fc1, Decl(strictFunctionTypesErrors.ts, 130, 11))
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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namespace n1 {
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>n1 : Symbol(n1, Decl(strictFunctionTypesErrors.ts, 133, 10))
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class Foo {
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>Foo : Symbol(Foo, Decl(strictFunctionTypesErrors.ts, 138, 14))
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static f1(x: Animal): Animal { throw "wat"; }
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>f1 : Symbol(Foo.f1, Decl(strictFunctionTypesErrors.ts, 139, 15))
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>x : Symbol(x, Decl(strictFunctionTypesErrors.ts, 140, 18))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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static f2(x: Dog): Animal { throw "wat"; };
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>f2 : Symbol(Foo.f2, Decl(strictFunctionTypesErrors.ts, 140, 53))
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>x : Symbol(x, Decl(strictFunctionTypesErrors.ts, 141, 18))
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>Dog : Symbol(Dog, Decl(strictFunctionTypesErrors.ts, 89, 33))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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}
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declare let f1: (cb: typeof Foo.f1) => void;
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 143, 15))
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>cb : Symbol(cb, Decl(strictFunctionTypesErrors.ts, 143, 21))
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>Foo.f1 : Symbol(Foo.f1, Decl(strictFunctionTypesErrors.ts, 139, 15))
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>Foo : Symbol(Foo, Decl(strictFunctionTypesErrors.ts, 138, 14))
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>f1 : Symbol(Foo.f1, Decl(strictFunctionTypesErrors.ts, 139, 15))
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declare let f2: (cb: typeof Foo.f2) => void;
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 144, 15))
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>cb : Symbol(cb, Decl(strictFunctionTypesErrors.ts, 144, 21))
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>Foo.f2 : Symbol(Foo.f2, Decl(strictFunctionTypesErrors.ts, 140, 53))
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>Foo : Symbol(Foo, Decl(strictFunctionTypesErrors.ts, 138, 14))
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>f2 : Symbol(Foo.f2, Decl(strictFunctionTypesErrors.ts, 140, 53))
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f1 = f2;
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 143, 15))
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 144, 15))
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f2 = f1; // Error
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 144, 15))
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 143, 15))
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}
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namespace n2 {
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>n2 : Symbol(n2, Decl(strictFunctionTypesErrors.ts, 147, 1))
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type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
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>BivariantHack : Symbol(BivariantHack, Decl(strictFunctionTypesErrors.ts, 149, 14))
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>Input : Symbol(Input, Decl(strictFunctionTypesErrors.ts, 150, 23))
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>Output : Symbol(Output, Decl(strictFunctionTypesErrors.ts, 150, 29))
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>foo : Symbol(foo, Decl(strictFunctionTypesErrors.ts, 150, 41))
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>x : Symbol(x, Decl(strictFunctionTypesErrors.ts, 150, 46))
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>Input : Symbol(Input, Decl(strictFunctionTypesErrors.ts, 150, 23))
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>Output : Symbol(Output, Decl(strictFunctionTypesErrors.ts, 150, 29))
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declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 151, 15))
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>cb : Symbol(cb, Decl(strictFunctionTypesErrors.ts, 151, 21))
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>BivariantHack : Symbol(BivariantHack, Decl(strictFunctionTypesErrors.ts, 149, 14))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 152, 15))
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>cb : Symbol(cb, Decl(strictFunctionTypesErrors.ts, 152, 21))
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>BivariantHack : Symbol(BivariantHack, Decl(strictFunctionTypesErrors.ts, 149, 14))
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>Dog : Symbol(Dog, Decl(strictFunctionTypesErrors.ts, 89, 33))
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>Animal : Symbol(Animal, Decl(strictFunctionTypesErrors.ts, 87, 8))
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f1 = f2;
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 151, 15))
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 152, 15))
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f2 = f1; // Error
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>f2 : Symbol(f2, Decl(strictFunctionTypesErrors.ts, 152, 15))
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>f1 : Symbol(f1, Decl(strictFunctionTypesErrors.ts, 151, 15))
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}
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@ -480,3 +480,87 @@ fc2 = fc1; // Error
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>fc2 : (f: (x: Dog) => Dog) => void
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>fc1 : (f: (x: Animal) => Animal) => void
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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namespace n1 {
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>n1 : typeof n1
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class Foo {
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>Foo : Foo
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static f1(x: Animal): Animal { throw "wat"; }
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>f1 : (x: Animal) => Animal
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>x : Animal
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>Animal : Animal
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>Animal : Animal
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>"wat" : "wat"
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static f2(x: Dog): Animal { throw "wat"; };
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>f2 : (x: Dog) => Animal
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>x : Dog
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>Dog : Dog
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>Animal : Animal
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>"wat" : "wat"
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}
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declare let f1: (cb: typeof Foo.f1) => void;
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>f1 : (cb: (x: Animal) => Animal) => void
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>cb : (x: Animal) => Animal
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>Foo.f1 : (x: Animal) => Animal
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>Foo : typeof Foo
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>f1 : (x: Animal) => Animal
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declare let f2: (cb: typeof Foo.f2) => void;
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>f2 : (cb: (x: Dog) => Animal) => void
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>cb : (x: Dog) => Animal
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>Foo.f2 : (x: Dog) => Animal
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>Foo : typeof Foo
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>f2 : (x: Dog) => Animal
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f1 = f2;
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>f1 = f2 : (cb: (x: Dog) => Animal) => void
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>f1 : (cb: (x: Animal) => Animal) => void
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>f2 : (cb: (x: Dog) => Animal) => void
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f2 = f1; // Error
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>f2 = f1 : (cb: (x: Animal) => Animal) => void
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>f2 : (cb: (x: Dog) => Animal) => void
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>f1 : (cb: (x: Animal) => Animal) => void
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}
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namespace n2 {
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>n2 : typeof n2
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type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
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>BivariantHack : (x: Input) => Output
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>Input : Input
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>Output : Output
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>foo : (x: Input) => Output
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>x : Input
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>Input : Input
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>Output : Output
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declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
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>f1 : (cb: (x: Animal) => Animal) => void
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>cb : (x: Animal) => Animal
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>BivariantHack : (x: Input) => Output
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>Animal : Animal
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>Animal : Animal
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declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
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>f2 : (cb: (x: Dog) => Animal) => void
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>cb : (x: Dog) => Animal
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>BivariantHack : (x: Input) => Output
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>Dog : Dog
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>Animal : Animal
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f1 = f2;
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>f1 = f2 : (cb: (x: Dog) => Animal) => void
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>f1 : (cb: (x: Animal) => Animal) => void
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>f2 : (cb: (x: Dog) => Animal) => void
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f2 = f1; // Error
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>f2 = f1 : (cb: (x: Animal) => Animal) => void
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>f2 : (cb: (x: Dog) => Animal) => void
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>f1 : (cb: (x: Animal) => Animal) => void
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}
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@ -133,3 +133,25 @@ declare let fc1: (f: (x: Animal) => Animal) => void;
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declare let fc2: (f: (x: Dog) => Dog) => void;
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fc1 = fc2; // Error
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fc2 = fc1; // Error
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// Verify that callback parameters aren't loosely checked when types
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// originate in method declarations
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namespace n1 {
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class Foo {
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static f1(x: Animal): Animal { throw "wat"; }
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static f2(x: Dog): Animal { throw "wat"; };
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}
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declare let f1: (cb: typeof Foo.f1) => void;
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declare let f2: (cb: typeof Foo.f2) => void;
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f1 = f2;
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f2 = f1; // Error
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}
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namespace n2 {
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type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
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declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
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declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
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f1 = f2;
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f2 = f1; // Error
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}
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