tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(10,29): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
  Type argument candidate 'number' is not a valid type argument because it is not a supertype of candidate 'string'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(15,21): error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(16,22): error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(25,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
  Types of parameters 'a' and 'x' are incompatible.
    Type 'T' is not assignable to type 'Date'.
      Property 'toDateString' is missing in type 'RegExp'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(37,36): error TS2345: Argument of type '(x: E) => F' is not assignable to parameter of type '(x: E) => E'.
  Type 'F' is not assignable to type 'E'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(50,21): error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(51,22): error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(60,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
  Types of parameters 'a' and 'x' are incompatible.
    Type 'T' is not assignable to type 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,51): error TS2304: Cannot find name 'U'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,57): error TS2304: Cannot find name 'U'.


==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts (10 errors) ====
    // When a function expression is inferentially typed (section 4.9.3) and a type assigned to a parameter in that expression references type parameters for which inferences are being made, 
    // the corresponding inferred type arguments to become fixed and no further candidate inferences are made for them.
    
    module onlyT {
        function foo<T>(a: (x: T) => T, b: (x: T) => T) {
            var r: (x: T) => T;
            return r;
        }
    
        var r1: (x: {}) => {} = foo((x: number) => 1, (x: string) => '');
                                ~~~
!!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453:   Type argument candidate 'number' is not a valid type argument because it is not a supertype of candidate 'string'.
    
        function other2<T extends Date>(x: T) {
            var r7 = foo((a: T) => a, (b: T) => b); // T => T
            // BUG 835518
            var r9 = r7(new Date()); // should be ok
                        ~~~~~~~~~~
!!! error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
            var r10 = r7(1); // error
                         ~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
        }
    
        function foo2<T extends Date>(a: (x: T) => T, b: (x: T) => T) {
            var r: (x: T) => T;
            return r;
        }
    
        function other3<T extends RegExp>(x: T) {
            var r7 = foo2((a: T) => a, (b: T) => b); // error
                          ~~~~~~~~~~~
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345:   Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345:     Type 'T' is not assignable to type 'Date'.
!!! error TS2345:       Property 'toDateString' is missing in type 'RegExp'.
            var r7b = foo2((a) => a, (b) => b); // valid, T is inferred to be Date
        }
    
        enum E { A }
        enum F { A }
    
        function foo3<T>(x: T, a: (x: T) => T, b: (x: T) => T) {
            var r: (x: T) => T;
            return r;
        }
    
        var r7 = foo3(E.A, (x) => E.A, (x) => F.A); // error
                                       ~~~~~~~~~~
!!! error TS2345: Argument of type '(x: E) => F' is not assignable to parameter of type '(x: E) => E'.
!!! error TS2345:   Type 'F' is not assignable to type 'E'.
    }
    
    module TU {
        function foo<T, U>(a: (x: T) => T, b: (x: U) => U) {
            var r: (x: T) => T;
            return r;
        }
    
        var r1: (x: {}) => {} = foo((x: number) => 1, (x: string) => '');
    
        function other2<T extends Date>(x: T) {
            var r7 = foo((a: T) => a, (b: T) => b); 
            var r9 = r7(new Date()); 
                        ~~~~~~~~~~
!!! error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
            var r10 = r7(1); 
                         ~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
        }
    
        function foo2<T extends Date, U extends Date>(a: (x: T) => T, b: (x: U) => U) {
            var r: (x: T) => T;
            return r;
        }
    
        function other3<T extends RegExp>(x: T) {
            var r7 = foo2((a: T) => a, (b: T) => b); 
                          ~~~~~~~~~~~
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345:   Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345:     Type 'T' is not assignable to type 'Date'.
            var r7b = foo2((a) => a, (b) => b); 
        }
    
        enum E { A }
        enum F { A }
    
        function foo3<T>(x: T, a: (x: T) => T, b: (x: U) => U) {
                                                      ~
!!! error TS2304: Cannot find name 'U'.
                                                            ~
!!! error TS2304: Cannot find name 'U'.
            var r: (x: T) => T;
            return r;
        }
    
        var r7 = foo3(E.A, (x) => E.A, (x) => F.A);
    }