=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/callSignatureAssignabilityInInheritance4.ts ===
// checking subtype relations for function types as it relates to contextual signature instantiation

class Base { foo: string; }
>Base : Base
>foo : string

class Derived extends Base { bar: string; }
>Derived : Derived
>Base : Base
>bar : string

class Derived2 extends Derived { baz: string; }
>Derived2 : Derived2
>Derived : Derived
>baz : string

class OtherDerived extends Base { bing: string; }
>OtherDerived : OtherDerived
>Base : Base
>bing : string

interface A { // T
>A : A

    // M's
    a: <T>(x: T) => T[];
>a : <T>(x: T) => T[]
>T : T
>x : T
>T : T
>T : T

    a2: <T>(x: T) => string[];
>a2 : <T>(x: T) => string[]
>T : T
>x : T
>T : T

    a3: <T>(x: T) => void;
>a3 : <T>(x: T) => void
>T : T
>x : T
>T : T

    a4: <T,U>(x: T, y: U) => string;
>a4 : <T, U>(x: T, y: U) => string
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U

    a5: <T,U>(x: (arg: T) => U) => T;
>a5 : <T, U>(x: (arg: T) => U) => T
>T : T
>U : U
>x : (arg: T) => U
>arg : T
>T : T
>U : U
>T : T

    a6: <T extends Base>(x: (arg: T) => Derived) => T;
>a6 : <T extends Base>(x: (arg: T) => Derived) => T
>T : T
>Base : Base
>x : (arg: T) => Derived
>arg : T
>T : T
>Derived : Derived
>T : T

    a11: <T>(x: { foo: T }, y: { foo: T; bar: T }) => Base;
>a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base
>T : T
>x : { foo: T; }
>foo : T
>T : T
>y : { foo: T; bar: T; }
>foo : T
>T : T
>bar : T
>T : T
>Base : Base

    a15: <T>(x: { a: T; b: T }) => T[];
>a15 : <T>(x: { a: T; b: T; }) => T[]
>T : T
>x : { a: T; b: T; }
>a : T
>T : T
>b : T
>T : T
>T : T

    a16: <T extends Base>(x: { a: T; b: T }) => T[];
>a16 : <T extends Base>(x: { a: T; b: T; }) => T[]
>T : T
>Base : Base
>x : { a: T; b: T; }
>a : T
>T : T
>b : T
>T : T
>T : T

    a17: {
>a17 : { <T extends Derived>(x: (a: T) => T): T[]; <T extends Base>(x: (a: T) => T): T[]; }

        <T extends Derived>(x: (a: T) => T): T[];
>T : T
>Derived : Derived
>x : (a: T) => T
>a : T
>T : T
>T : T
>T : T

        <T extends Base>(x: (a: T) => T): T[];        
>T : T
>Base : Base
>x : (a: T) => T
>a : T
>T : T
>T : T
>T : T

    };
    a18: {
>a18 : { (x: { <T extends Derived>(a: T): T; <T extends Base>(a: T): T; }): any[]; (x: { <T extends Derived2>(a: T): T; <T extends Base>(a: T): T; }): any[]; }

        (x: {
>x : { <T extends Derived>(a: T): T; <T extends Base>(a: T): T; }

            <T extends Derived>(a: T): T;
>T : T
>Derived : Derived
>a : T
>T : T
>T : T

            <T extends Base>(a: T): T;
>T : T
>Base : Base
>a : T
>T : T
>T : T

        }): any[];
        (x: {
>x : { <T extends Derived2>(a: T): T; <T extends Base>(a: T): T; }

            <T extends Derived2>(a: T): T;
>T : T
>Derived2 : Derived2
>a : T
>T : T
>T : T

            <T extends Base>(a: T): T;
>T : T
>Base : Base
>a : T
>T : T
>T : T

        }): any[];
    };
}

// S's
interface I extends A {
>I : I
>A : A

    // N's
    a: <T>(x: T) => T[]; // ok, instantiation of N is a subtype of M, T is number
>a : <T>(x: T) => T[]
>T : T
>x : T
>T : T
>T : T

    a2: <T>(x: T) => string[]; // ok
>a2 : <T>(x: T) => string[]
>T : T
>x : T
>T : T

    a3: <T>(x: T) => T; // ok since Base returns void
>a3 : <T>(x: T) => T
>T : T
>x : T
>T : T
>T : T

    a4: <T, U>(x: T, y: U) => string; // ok, instantiation of N is a subtype of M, T is string, U is number
>a4 : <T, U>(x: T, y: U) => string
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U

    a5: <T, U>(x: (arg: T) => U) => T; // ok, U is in a parameter position so inferences can be made
>a5 : <T, U>(x: (arg: T) => U) => T
>T : T
>U : U
>x : (arg: T) => U
>arg : T
>T : T
>U : U
>T : T

    a6: <T extends Base, U extends Derived>(x: (arg: T) => U) => T; // ok, same as a5 but with object type hierarchy
>a6 : <T extends Base, U extends Derived>(x: (arg: T) => U) => T
>T : T
>Base : Base
>U : U
>Derived : Derived
>x : (arg: T) => U
>arg : T
>T : T
>U : U
>T : T

    a11: <T, U>(x: { foo: T }, y: { foo: U; bar: U }) => Base; // ok
>a11 : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base
>T : T
>U : U
>x : { foo: T; }
>foo : T
>T : T
>y : { foo: U; bar: U; }
>foo : U
>U : U
>bar : U
>U : U
>Base : Base

    a15: <U, V>(x: { a: U; b: V; }) => U[]; // ok, T = U, T = V
>a15 : <U, V>(x: { a: U; b: V; }) => U[]
>U : U
>V : V
>x : { a: U; b: V; }
>a : U
>U : U
>b : V
>V : V
>U : U

    a16: <T>(x: { a: T; b: T }) => T[]; // ok, more general parameter type
>a16 : <T>(x: { a: T; b: T; }) => T[]
>T : T
>x : { a: T; b: T; }
>a : T
>T : T
>b : T
>T : T
>T : T

    a17: <T>(x: (a: T) => T) => T[]; // ok
>a17 : <T>(x: (a: T) => T) => T[]
>T : T
>x : (a: T) => T
>a : T
>T : T
>T : T
>T : T

    a18: (x: <T>(a: T) => T) => any[]; // ok
>a18 : (x: <T>(a: T) => T) => any[]
>x : <T>(a: T) => T
>T : T
>a : T
>T : T
>T : T
}