assignmentCompatWithCallSignatures3.errors.txt

tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(47,1): error TS2322: Type '(x: number) => number[]' is not assignable to type '<T>(x: T) => T[]'.
  Types of parameters 'x' and 'x' are incompatible.
    Type 'T' is not assignable to type 'number'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(50,1): error TS2322: Type '(x: number) => string[]' is not assignable to type '<T>(x: T) => string[]'.
  Types of parameters 'x' and 'x' are incompatible.
    Type 'T' is not assignable to type 'number'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(53,1): error TS2322: Type '(x: number) => void' is not assignable to type '<T>(x: T) => T'.
  Types of parameters 'x' and 'x' are incompatible.
    Type 'T' is not assignable to type 'number'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(56,1): error TS2322: Type '(x: string, y: number) => string' is not assignable to type '<T, U>(x: T, y: U) => T'.
  Types of parameters 'x' and 'x' are incompatible.
    Type 'T' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(59,1): error TS2322: Type '(x: (arg: string) => number) => string' is not assignable to type '<T, U>(x: (arg: T) => U) => T'.
  Types of parameters 'x' and 'x' are incompatible.
    Types of parameters 'arg' and 'arg' are incompatible.
      Type 'string' is not assignable to type 'T'.
        'string' is assignable to the constraint of type '{}', but 'T' could be instantiated with a different subtype of constraint '{}'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(62,1): error TS2322: Type '(x: (arg: Base) => Derived) => Base' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U) => T'.
  Types of parameters 'x' and 'x' are incompatible.
    Types of parameters 'arg' and 'arg' are incompatible.
      Type 'Base' is not assignable to type 'T'.
        'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(65,1): error TS2322: Type '(x: (arg: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U'.
  Types of parameters 'x' and 'x' are incompatible.
    Types of parameters 'arg' and 'arg' are incompatible.
      Type 'Base' is not assignable to type 'T'.
        'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(68,1): error TS2322: Type '(x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U'.
  Types of parameters 'x' and 'x' are incompatible.
    Types of parameters 'arg' and 'arg' are incompatible.
      Type 'Base' is not assignable to type 'T'.
        'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(71,1): error TS2322: Type '(x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number; }) => U) => (r: T) => U'.
  Types of parameters 'x' and 'x' are incompatible.
    Types of parameters 'arg' and 'arg' are incompatible.
      Type 'Base' is not assignable to type 'T'.
        'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(74,1): error TS2322: Type '(...x: Derived[]) => Derived' is not assignable to type '<T extends Derived>(...x: T[]) => T'.
  Type 'Derived' is not assignable to type 'T'.
    'Derived' is assignable to the constraint of type 'Derived', but 'T' could be instantiated with a different subtype of constraint 'Derived'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(77,1): error TS2322: Type '(x: { foo: string; }, y: { foo: string; bar: string; }) => Base' is not assignable to type '<T extends Base>(x: T, y: T) => T'.
  Types of parameters 'y' and 'y' are incompatible.
    Type 'T' is not assignable to type '{ foo: string; bar: string; }'.
      Property 'bar' is missing in type 'Base' but required in type '{ foo: string; bar: string; }'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(80,1): error TS2322: Type '(x: Base[], y: Derived2[]) => Derived[]' is not assignable to type '<T extends Base[]>(x: Base[], y: T) => Derived[]'.
  Types of parameters 'y' and 'y' are incompatible.
    Type 'T' is not assignable to type 'Derived2[]'.
      Type 'Base[]' is not assignable to type 'Derived2[]'.
        Type 'Base' is missing the following properties from type 'Derived2': baz, bar
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(83,1): error TS2322: Type '(x: Base[], y: Derived[]) => Derived[]' is not assignable to type '<T extends Derived[]>(x: Base[], y: T) => T'.
  Type 'Derived[]' is not assignable to type 'T'.
    'Derived[]' is assignable to the constraint of type 'Derived[]', but 'T' could be instantiated with a different subtype of constraint 'Derived[]'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(85,1): error TS2322: Type '<T>(x: { a: T; b: T; }) => T' is not assignable to type '(x: { a: string; b: number; }) => Object'.
  Types of parameters 'x' and 'x' are incompatible.
    Type '{ a: string; b: number; }' is not assignable to type '{ a: string; b: string; }'.
      Types of property 'b' are incompatible.
        Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts(86,1): error TS2322: Type '(x: { a: string; b: number; }) => Object' is not assignable to type '<T>(x: { a: T; b: T; }) => T'.
  Types of parameters 'x' and 'x' are incompatible.
    Type '{ a: T; b: T; }' is not assignable to type '{ a: string; b: number; }'.
      Types of property 'a' are incompatible.
        Type 'T' is not assignable to type 'string'.


==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts (15 errors) ====
    // these are all permitted with the current rules, since we do not do contextual signature instantiation
    
    class Base { foo: string; }
    class Derived extends Base { bar: string; }
    class Derived2 extends Derived { baz: string; }
    class OtherDerived extends Base { bing: string; }
    
    var a: (x: number) => number[];
    var a2: (x: number) => string[];
    var a3: (x: number) => void;
    var a4: (x: string, y: number) => string;
    var a5: (x: (arg: string) => number) => string;
    var a6: (x: (arg: Base) => Derived) => Base;
    var a7: (x: (arg: Base) => Derived) => (r: Base) => Derived;
    var a8: (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
    var a9: (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
    var a10: (...x: Derived[]) => Derived;
    var a11: (x: { foo: string }, y: { foo: string; bar: string }) => Base;
    var a12: (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
    var a13: (x: Array<Base>, y: Array<Derived>) => Array<Derived>;
    var a14: (x: { a: string; b: number }) => Object;
    var a15: {
        (x: number): number[];
        (x: string): string[];
    }
    var a16: {
        <T extends Derived>(x: T): number[];
        <U extends Base>(x: U): number[];
    }
    var a17: {
        (x: (a: number) => number): number[];
        (x: (a: string) => string): string[];
    };
    var a18: {
        (x: {
            (a: number): number;
            (a: string): string;
        }): any[];
        (x: {
            (a: boolean): boolean;
            (a: Date): Date;
        }): any[];
    }
    
    var b: <T>(x: T) => T[]; 
    a = b; // ok
    b = a; // ok
    ~
!!! error TS2322: Type '(x: number) => number[]' is not assignable to type '<T>(x: T) => T[]'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type 'number'.
    var b2: <T>(x: T) => string[]; 
    a2 = b2; // ok 
    b2 = a2; // ok
    ~~
!!! error TS2322: Type '(x: number) => string[]' is not assignable to type '<T>(x: T) => string[]'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type 'number'.
    var b3: <T>(x: T) => T; 
    a3 = b3; // ok
    b3 = a3; // ok
    ~~
!!! error TS2322: Type '(x: number) => void' is not assignable to type '<T>(x: T) => T'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type 'number'.
    var b4: <T, U>(x: T, y: U) => T; 
    a4 = b4; // ok
    b4 = a4; // ok
    ~~
!!! error TS2322: Type '(x: string, y: number) => string' is not assignable to type '<T, U>(x: T, y: U) => T'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type 'string'.
    var b5: <T, U>(x: (arg: T) => U) => T; 
    a5 = b5; // ok
    b5 = a5; // ok
    ~~
!!! error TS2322: Type '(x: (arg: string) => number) => string' is not assignable to type '<T, U>(x: (arg: T) => U) => T'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Types of parameters 'arg' and 'arg' are incompatible.
!!! error TS2322:       Type 'string' is not assignable to type 'T'.
!!! error TS2322:         'string' is assignable to the constraint of type '{}', but 'T' could be instantiated with a different subtype of constraint '{}'.
    var b6: <T extends Base, U extends Derived>(x: (arg: T) => U) => T; 
    a6 = b6; // ok
    b6 = a6; // ok
    ~~
!!! error TS2322: Type '(x: (arg: Base) => Derived) => Base' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U) => T'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Types of parameters 'arg' and 'arg' are incompatible.
!!! error TS2322:       Type 'Base' is not assignable to type 'T'.
!!! error TS2322:         'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
    var b7: <T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U; 
    a7 = b7; // ok
    b7 = a7; // ok
    ~~
!!! error TS2322: Type '(x: (arg: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Types of parameters 'arg' and 'arg' are incompatible.
!!! error TS2322:       Type 'Base' is not assignable to type 'T'.
!!! error TS2322:         'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
    var b8: <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U;
    a8 = b8; // ok
    b8 = a8; // ok
    ~~
!!! error TS2322: Type '(x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Types of parameters 'arg' and 'arg' are incompatible.
!!! error TS2322:       Type 'Base' is not assignable to type 'T'.
!!! error TS2322:         'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
    var b9: <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number }) => U) => (r: T) => U; 
    a9 = b9; // ok
    b9 = a9; // ok
    ~~
!!! error TS2322: Type '(x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived' is not assignable to type '<T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number; }) => U) => (r: T) => U'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Types of parameters 'arg' and 'arg' are incompatible.
!!! error TS2322:       Type 'Base' is not assignable to type 'T'.
!!! error TS2322:         'Base' is assignable to the constraint of type 'Base', but 'T' could be instantiated with a different subtype of constraint 'Base'.
    var b10: <T extends Derived>(...x: T[]) => T; 
    a10 = b10; // ok
    b10 = a10; // ok
    ~~~
!!! error TS2322: Type '(...x: Derived[]) => Derived' is not assignable to type '<T extends Derived>(...x: T[]) => T'.
!!! error TS2322:   Type 'Derived' is not assignable to type 'T'.
!!! error TS2322:     'Derived' is assignable to the constraint of type 'Derived', but 'T' could be instantiated with a different subtype of constraint 'Derived'.
    var b11: <T extends Base>(x: T, y: T) => T; 
    a11 = b11; // ok
    b11 = a11; // ok
    ~~~
!!! error TS2322: Type '(x: { foo: string; }, y: { foo: string; bar: string; }) => Base' is not assignable to type '<T extends Base>(x: T, y: T) => T'.
!!! error TS2322:   Types of parameters 'y' and 'y' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type '{ foo: string; bar: string; }'.
!!! error TS2322:       Property 'bar' is missing in type 'Base' but required in type '{ foo: string; bar: string; }'.
!!! related TS2728 tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures3.ts:18:49: 'bar' is declared here.
    var b12: <T extends Array<Base>>(x: Array<Base>, y: T) => Array<Derived>; 
    a12 = b12; // ok
    b12 = a12; // ok
    ~~~
!!! error TS2322: Type '(x: Base[], y: Derived2[]) => Derived[]' is not assignable to type '<T extends Base[]>(x: Base[], y: T) => Derived[]'.
!!! error TS2322:   Types of parameters 'y' and 'y' are incompatible.
!!! error TS2322:     Type 'T' is not assignable to type 'Derived2[]'.
!!! error TS2322:       Type 'Base[]' is not assignable to type 'Derived2[]'.
!!! error TS2322:         Type 'Base' is missing the following properties from type 'Derived2': baz, bar
    var b13: <T extends Array<Derived>>(x: Array<Base>, y: T) => T; 
    a13 = b13; // ok
    b13 = a13; // ok
    ~~~
!!! error TS2322: Type '(x: Base[], y: Derived[]) => Derived[]' is not assignable to type '<T extends Derived[]>(x: Base[], y: T) => T'.
!!! error TS2322:   Type 'Derived[]' is not assignable to type 'T'.
!!! error TS2322:     'Derived[]' is assignable to the constraint of type 'Derived[]', but 'T' could be instantiated with a different subtype of constraint 'Derived[]'.
    var b14: <T>(x: { a: T; b: T }) => T; 
    a14 = b14; // ok
    ~~~
!!! error TS2322: Type '<T>(x: { a: T; b: T; }) => T' is not assignable to type '(x: { a: string; b: number; }) => Object'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type '{ a: string; b: number; }' is not assignable to type '{ a: string; b: string; }'.
!!! error TS2322:       Types of property 'b' are incompatible.
!!! error TS2322:         Type 'number' is not assignable to type 'string'.
    b14 = a14; // ok
    ~~~
!!! error TS2322: Type '(x: { a: string; b: number; }) => Object' is not assignable to type '<T>(x: { a: T; b: T; }) => T'.
!!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
!!! error TS2322:     Type '{ a: T; b: T; }' is not assignable to type '{ a: string; b: number; }'.
!!! error TS2322:       Types of property 'a' are incompatible.
!!! error TS2322:         Type 'T' is not assignable to type 'string'.
    var b15: <T>(x: T) => T[]; 
    a15 = b15; // ok
    b15 = a15; // ok
    var b16: <T extends Base>(x: T) => number[];
    a16 = b16; // ok
    b16 = a16; // ok
    var b17: <T>(x: (a: T) => T) => T[]; // ok
    a17 = b17; // ok
    b17 = a17; // ok
    var b18: <T>(x: (a: T) => T) => T[]; 
    a18 = b18; // ok
    b18 = a18; // ok