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tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts(30,1): error TS2322: Type '<T>(x: T) => void' is not assignable to type '<T>(x: T) => T'.
Type 'void' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'void'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts(39,1): error TS2322: Type '<T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base' is not assignable to type '<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base'.
Types of parameters 'y' and 'y' are incompatible.
Type '{ foo: U; bar: U; }' is not assignable to type '{ foo: T; bar: T; }'.
Types of property 'foo' are incompatible.
Type 'U' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts(42,1): error TS2322: Type '<T extends Base>(x: { a: T; b: T; }) => T[]' 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: Base; b: Base; }'.
Types of property 'a' are incompatible.
Type 'T' is not assignable to type 'Base'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts (3 errors) ====
// checking assignment compatibility relations for function types. All valid
class Base { foo: string; }
class Derived extends Base { bar: string; }
class Derived2 extends Derived { baz: string; }
class OtherDerived extends Base { bing: string; }
interface A {
a: <T>(x: T) => T[];
a2: <T>(x: T) => string[];
a3: <T>(x: T) => void;
a4: <T,U>(x: T, y: U) => string;
a5: <T,U>(x: (arg: T) => U) => T;
a6: <T extends Base>(x: (arg: T) => Derived) => T;
a11: <T>(x: { foo: T }, y: { foo: T; bar: T }) => Base;
a15: <T>(x: { a: T; b: T }) => T[];
a16: <T extends Base>(x: { a: T; b: T }) => T[];
}
var x: A;
var b: <T>(x: T) => T[];
x.a = b;
b = x.a;
var b2: <T>(x: T) => string[];
x.a2 = b2;
b2 = x.a2;
var b3: <T>(x: T) => T;
x.a3 = b3;
b3 = x.a3;
~~
!!! error TS2322: Type '<T>(x: T) => void' is not assignable to type '<T>(x: T) => T'.
!!! error TS2322: Type 'void' is not assignable to type 'T'.
!!! error TS2322: 'T' could be instantiated with an arbitrary type which could be unrelated to 'void'.
var b4: <T, U>(x: T, y: U) => string;
x.a4 = b4;
b4 = x.a4;
var b5: <T, U>(x: (arg: T) => U) => T;
x.a5 = b5;
b5 = x.a5;
var b11: <T, U>(x: { foo: T }, y: { foo: U; bar: U }) => Base;
x.a11 = b11;
b11 = x.a11;
~~~
!!! error TS2322: Type '<T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base' is not assignable to type '<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base'.
!!! error TS2322: Types of parameters 'y' and 'y' are incompatible.
!!! error TS2322: Type '{ foo: U; bar: U; }' is not assignable to type '{ foo: T; bar: T; }'.
!!! error TS2322: Types of property 'foo' are incompatible.
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: 'T' could be instantiated with an arbitrary type which could be unrelated to 'U'.
!!! related TS2208 tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts:37:14: This type parameter might need an `extends T` constraint.
var b16: <T>(x: { a: T; b: T }) => T[];
x.a16 = b16;
b16 = x.a16;
~~~
!!! error TS2322: Type '<T extends Base>(x: { a: T; b: T; }) => T[]' 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: Base; b: Base; }'.
!!! error TS2322: Types of property 'a' are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Base'.
!!! related TS2208 tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts:40:11: This type parameter might need an `extends Base` constraint.
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