=== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithCallSignatures4.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

declare function foo1(a: <T>(x: T) => T[]);
>foo1 : { (a: <T>(x: T) => T[]): any; (a: any): any; }
>a : <T>(x: T) => T[]
>T : T
>x : T
>T : T
>T : T

declare function foo1(a: any): any;
>foo1 : { (a: <T>(x: T) => T[]): any; (a: any): any; }
>a : any

declare function foo2(a2: <T>(x: T) => string[]);
>foo2 : { (a2: <T>(x: T) => string[]): any; (a: any): any; }
>a2 : <T>(x: T) => string[]
>T : T
>x : T
>T : T

declare function foo2(a: any): any;
>foo2 : { (a2: <T>(x: T) => string[]): any; (a: any): any; }
>a : any

declare function foo3(a3: <T>(x: T) => void);
>foo3 : { (a3: <T>(x: T) => void): any; (a: any): any; }
>a3 : <T>(x: T) => void
>T : T
>x : T
>T : T

declare function foo3(a: any): any;
>foo3 : { (a3: <T>(x: T) => void): any; (a: any): any; }
>a : any

declare function foo4(a4: <T, U>(x: T, y: U) => string);
>foo4 : { (a4: <T, U>(x: T, y: U) => string): any; (a: any): any; }
>a4 : <T, U>(x: T, y: U) => string
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U

declare function foo4(a: any): any;
>foo4 : { (a4: <T, U>(x: T, y: U) => string): any; (a: any): any; }
>a : any

declare function foo5(a5: <T, U>(x: (arg: T) => U) => T);
>foo5 : { (a5: <T, U>(x: (arg: T) => U) => T): any; (a: any): any; }
>a5 : <T, U>(x: (arg: T) => U) => T
>T : T
>U : U
>x : (arg: T) => U
>arg : T
>T : T
>U : U
>T : T

declare function foo5(a: any): any;
>foo5 : { (a5: <T, U>(x: (arg: T) => U) => T): any; (a: any): any; }
>a : any

declare function foo6(a6: <T extends Base>(x: (arg: T) => Derived) => T);
>foo6 : { (a6: <T extends Base>(x: (arg: T) => Derived) => T): any; (a: any): any; }
>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

declare function foo6(a: any): any;
>foo6 : { (a6: <T extends Base>(x: (arg: T) => Derived) => T): any; (a: any): any; }
>a : any

declare function foo11(a11: <T>(x: { foo: T }, y: { foo: T; bar: T }) => Base);
>foo11 : { (a11: <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base): any; (a: any): any; }
>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

declare function foo11(a: any): any;
>foo11 : { (a11: <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base): any; (a: any): any; }
>a : any

declare function foo15(a15: <T>(x: { a: T; b: T }) => T[]);
>foo15 : { (a15: <T>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>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

declare function foo15(a: any): any;
>foo15 : { (a15: <T>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>a : any

declare function foo16(a16: <T extends Base>(x: { a: T; b: T }) => T[]);
>foo16 : { (a16: <T extends Base>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>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

declare function foo16(a: any): any;
>foo16 : { (a16: <T extends Base>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>a : any

declare function foo17(a17: {
>foo17 : { (a17: { <T extends Derived>(x: (a: T) => T): T[]; <T extends Base>(x: (a: T) => T): T[]; }): any; (a: any): any; }
>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

});
declare function foo17(a: any): any;
>foo17 : { (a17: { <T extends Derived>(x: (a: T) => T): T[]; <T extends Base>(x: (a: T) => T): T[]; }): any; (a: any): any; }
>a : any

declare function foo18(a18: {
>foo18 : { (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[]; }): any; (a: any): any; }
>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[];
});
declare function foo18(a: any): any;
>foo18 : { (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[]; }): any; (a: any): any; }
>a : any

var r1arg = <T>(x: T) => <T[]>null;
>r1arg : <T>(x: T) => T[]
><T>(x: T) => <T[]>null : <T>(x: T) => T[]
>T : T
>x : T
>T : T
><T[]>null : T[]
>T : T
>null : null

var r1arg2 = <T>(x: T) => <T[]>null;
>r1arg2 : <T>(x: T) => T[]
><T>(x: T) => <T[]>null : <T>(x: T) => T[]
>T : T
>x : T
>T : T
><T[]>null : T[]
>T : T
>null : null

var r1 = foo1(r1arg);
>r1 : any
>foo1(r1arg) : any
>foo1 : { (a: <T>(x: T) => T[]): any; (a: any): any; }
>r1arg : <T>(x: T) => T[]

var r1a = [r1arg, r1arg2];
>r1a : (<T>(x: T) => T[])[]
>[r1arg, r1arg2] : (<T>(x: T) => T[])[]
>r1arg : <T>(x: T) => T[]
>r1arg2 : <T>(x: T) => T[]

var r1b = [r1arg2, r1arg];
>r1b : (<T>(x: T) => T[])[]
>[r1arg2, r1arg] : (<T>(x: T) => T[])[]
>r1arg2 : <T>(x: T) => T[]
>r1arg : <T>(x: T) => T[]

var r2arg = <T>(x: T) => [''];
>r2arg : <T>(x: T) => string[]
><T>(x: T) => [''] : <T>(x: T) => string[]
>T : T
>x : T
>T : T
>[''] : string[]
>'' : string

var r2arg2 = <T>(x: T) => [''];
>r2arg2 : <T>(x: T) => string[]
><T>(x: T) => [''] : <T>(x: T) => string[]
>T : T
>x : T
>T : T
>[''] : string[]
>'' : string

var r2 = foo2(r2arg);
>r2 : any
>foo2(r2arg) : any
>foo2 : { (a2: <T>(x: T) => string[]): any; (a: any): any; }
>r2arg : <T>(x: T) => string[]

var r2a = [r2arg, r2arg2];
>r2a : (<T>(x: T) => string[])[]
>[r2arg, r2arg2] : (<T>(x: T) => string[])[]
>r2arg : <T>(x: T) => string[]
>r2arg2 : <T>(x: T) => string[]

var r2b = [r2arg2, r2arg];
>r2b : (<T>(x: T) => string[])[]
>[r2arg2, r2arg] : (<T>(x: T) => string[])[]
>r2arg2 : <T>(x: T) => string[]
>r2arg : <T>(x: T) => string[]

var r3arg = <T>(x: T) => <T>null;
>r3arg : <T>(x: T) => T
><T>(x: T) => <T>null : <T>(x: T) => T
>T : T
>x : T
>T : T
><T>null : T
>T : T
>null : null

var r3arg2 = <T>(x: T) => { };
>r3arg2 : <T>(x: T) => void
><T>(x: T) => { } : <T>(x: T) => void
>T : T
>x : T
>T : T

var r3 = foo3(r3arg);
>r3 : any
>foo3(r3arg) : any
>foo3 : { (a3: <T>(x: T) => void): any; (a: any): any; }
>r3arg : <T>(x: T) => T

var r3a = [r3arg, r3arg2];
>r3a : (<T>(x: T) => T)[]
>[r3arg, r3arg2] : (<T>(x: T) => T)[]
>r3arg : <T>(x: T) => T
>r3arg2 : <T>(x: T) => void

var r3b = [r3arg2, r3arg];
>r3b : (<T>(x: T) => T)[]
>[r3arg2, r3arg] : (<T>(x: T) => T)[]
>r3arg2 : <T>(x: T) => void
>r3arg : <T>(x: T) => T

var r4arg = <T, U>(x: T, y: U) => '';
>r4arg : <T, U>(x: T, y: U) => string
><T, U>(x: T, y: U) => '' : <T, U>(x: T, y: U) => string
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U
>'' : string

var r4arg2 = <T, U>(x: T, y: U) => '';
>r4arg2 : <T, U>(x: T, y: U) => string
><T, U>(x: T, y: U) => '' : <T, U>(x: T, y: U) => string
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U
>'' : string

var r4 = foo4(r4arg);
>r4 : any
>foo4(r4arg) : any
>foo4 : { (a4: <T, U>(x: T, y: U) => string): any; (a: any): any; }
>r4arg : <T, U>(x: T, y: U) => string

var r4a = [r4arg, r4arg2];
>r4a : (<T, U>(x: T, y: U) => string)[]
>[r4arg, r4arg2] : (<T, U>(x: T, y: U) => string)[]
>r4arg : <T, U>(x: T, y: U) => string
>r4arg2 : <T, U>(x: T, y: U) => string

var r4b = [r4arg2, r4arg];
>r4b : (<T, U>(x: T, y: U) => string)[]
>[r4arg2, r4arg] : (<T, U>(x: T, y: U) => string)[]
>r4arg2 : <T, U>(x: T, y: U) => string
>r4arg : <T, U>(x: T, y: U) => string

var r5arg = <T, U>(x: (arg: T) => U) => <T>null;
>r5arg : <T, U>(x: (arg: T) => U) => T
><T, U>(x: (arg: T) => U) => <T>null : <T, U>(x: (arg: T) => U) => T
>T : T
>U : U
>x : (arg: T) => U
>arg : T
>T : T
>U : U
><T>null : T
>T : T
>null : null

var r5arg2 = <T, U>(x: (arg: T) => U) => <T>null;
>r5arg2 : <T, U>(x: (arg: T) => U) => T
><T, U>(x: (arg: T) => U) => <T>null : <T, U>(x: (arg: T) => U) => T
>T : T
>U : U
>x : (arg: T) => U
>arg : T
>T : T
>U : U
><T>null : T
>T : T
>null : null

var r5 = foo5(r5arg);
>r5 : any
>foo5(r5arg) : any
>foo5 : { (a5: <T, U>(x: (arg: T) => U) => T): any; (a: any): any; }
>r5arg : <T, U>(x: (arg: T) => U) => T

var r5a = [r5arg, r5arg2];
>r5a : (<T, U>(x: (arg: T) => U) => T)[]
>[r5arg, r5arg2] : (<T, U>(x: (arg: T) => U) => T)[]
>r5arg : <T, U>(x: (arg: T) => U) => T
>r5arg2 : <T, U>(x: (arg: T) => U) => T

var r5b = [r5arg2, r5arg];
>r5b : (<T, U>(x: (arg: T) => U) => T)[]
>[r5arg2, r5arg] : (<T, U>(x: (arg: T) => U) => T)[]
>r5arg2 : <T, U>(x: (arg: T) => U) => T
>r5arg : <T, U>(x: (arg: T) => U) => T

var r6arg = <T extends Base, U extends Derived>(x: (arg: T) => U) => <T>null;
>r6arg : <T extends Base, U extends Derived>(x: (arg: T) => U) => T
><T extends Base, U extends Derived>(x: (arg: T) => U) => <T>null : <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>null : T
>T : T
>null : null

var r6arg2 = <T extends Base>(x: (arg: T) => Derived) => <T>null;
>r6arg2 : <T extends Base>(x: (arg: T) => Derived) => T
><T extends Base>(x: (arg: T) => Derived) => <T>null : <T extends Base>(x: (arg: T) => Derived) => T
>T : T
>Base : Base
>x : (arg: T) => Derived
>arg : T
>T : T
>Derived : Derived
><T>null : T
>T : T
>null : null

var r6 = foo6(r6arg);
>r6 : any
>foo6(r6arg) : any
>foo6 : { (a6: <T extends Base>(x: (arg: T) => Derived) => T): any; (a: any): any; }
>r6arg : <T extends Base, U extends Derived>(x: (arg: T) => U) => T

var r6a = [r6arg, r6arg2];
>r6a : (<T extends Base, U extends Derived>(x: (arg: T) => U) => T)[]
>[r6arg, r6arg2] : (<T extends Base, U extends Derived>(x: (arg: T) => U) => T)[]
>r6arg : <T extends Base, U extends Derived>(x: (arg: T) => U) => T
>r6arg2 : <T extends Base>(x: (arg: T) => Derived) => T

var r6b = [r6arg2, r6arg];
>r6b : (<T extends Base, U extends Derived>(x: (arg: T) => U) => T)[]
>[r6arg2, r6arg] : (<T extends Base, U extends Derived>(x: (arg: T) => U) => T)[]
>r6arg2 : <T extends Base>(x: (arg: T) => Derived) => T
>r6arg : <T extends Base, U extends Derived>(x: (arg: T) => U) => T

var r11arg = <T, U>(x: { foo: T }, y: { foo: U; bar: U }) => <Base>null;
>r11arg : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base
><T, U>(x: { foo: T }, y: { foo: U; bar: U }) => <Base>null : <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>null : Base
>Base : Base
>null : null

var r11arg2 = <T>(x: { foo: T }, y: { foo: T; bar: T }) => <Base>null;
>r11arg2 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base
><T>(x: { foo: T }, y: { foo: T; bar: T }) => <Base>null : <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>null : Base
>Base : Base
>null : null

var r11 = foo11(r11arg);
>r11 : any
>foo11(r11arg) : any
>foo11 : { (a11: <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base): any; (a: any): any; }
>r11arg : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base

var r11a = [r11arg, r11arg2];
>r11a : (<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base)[]
>[r11arg, r11arg2] : (<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base)[]
>r11arg : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base
>r11arg2 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base

var r11b = [r11arg2, r11arg];
>r11b : (<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base)[]
>[r11arg2, r11arg] : (<T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base)[]
>r11arg2 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base
>r11arg : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base

var r15arg = <U, V>(x: { a: U; b: V; }) => <U[]>null;
>r15arg : <U, V>(x: { a: U; b: V; }) => U[]
><U, V>(x: { a: U; b: V; }) => <U[]>null : <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[]>null : U[]
>U : U
>null : null

var r15arg2 = <T>(x: { a: T; b: T }) => <T[]>null;
>r15arg2 : <T>(x: { a: T; b: T; }) => T[]
><T>(x: { a: T; b: T }) => <T[]>null : <T>(x: { a: T; b: T; }) => T[]
>T : T
>x : { a: T; b: T; }
>a : T
>T : T
>b : T
>T : T
><T[]>null : T[]
>T : T
>null : null

var r15 = foo15(r15arg);
>r15 : any
>foo15(r15arg) : any
>foo15 : { (a15: <T>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>r15arg : <U, V>(x: { a: U; b: V; }) => U[]

var r15a = [r15arg, r15arg2];
>r15a : (<U, V>(x: { a: U; b: V; }) => U[])[]
>[r15arg, r15arg2] : (<U, V>(x: { a: U; b: V; }) => U[])[]
>r15arg : <U, V>(x: { a: U; b: V; }) => U[]
>r15arg2 : <T>(x: { a: T; b: T; }) => T[]

var r15b = [r15arg2, r15arg];
>r15b : (<U, V>(x: { a: U; b: V; }) => U[])[]
>[r15arg2, r15arg] : (<U, V>(x: { a: U; b: V; }) => U[])[]
>r15arg2 : <T>(x: { a: T; b: T; }) => T[]
>r15arg : <U, V>(x: { a: U; b: V; }) => U[]

var r16arg = <T extends Base>(x: { a: T; b: T }) => <T[]>null;
>r16arg : <T extends Base>(x: { a: T; b: T; }) => T[]
><T extends Base>(x: { a: T; b: T }) => <T[]>null : <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[]>null : T[]
>T : T
>null : null

var r16arg2 = <T extends Base>(x: { a: T; b: T }) => <T[]>null;
>r16arg2 : <T extends Base>(x: { a: T; b: T; }) => T[]
><T extends Base>(x: { a: T; b: T }) => <T[]>null : <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[]>null : T[]
>T : T
>null : null

var r16 = foo16(r16arg);
>r16 : any
>foo16(r16arg) : any
>foo16 : { (a16: <T extends Base>(x: { a: T; b: T; }) => T[]): any; (a: any): any; }
>r16arg : <T extends Base>(x: { a: T; b: T; }) => T[]

var r16a = [r16arg, r16arg2];
>r16a : (<T extends Base>(x: { a: T; b: T; }) => T[])[]
>[r16arg, r16arg2] : (<T extends Base>(x: { a: T; b: T; }) => T[])[]
>r16arg : <T extends Base>(x: { a: T; b: T; }) => T[]
>r16arg2 : <T extends Base>(x: { a: T; b: T; }) => T[]

var r16b = [r16arg2, r16arg];
>r16b : (<T extends Base>(x: { a: T; b: T; }) => T[])[]
>[r16arg2, r16arg] : (<T extends Base>(x: { a: T; b: T; }) => T[])[]
>r16arg2 : <T extends Base>(x: { a: T; b: T; }) => T[]
>r16arg : <T extends Base>(x: { a: T; b: T; }) => T[]

var r17arg = <T>(x: (a: T) => T) => <T[]>null;
>r17arg : <T>(x: (a: T) => T) => T[]
><T>(x: (a: T) => T) => <T[]>null : <T>(x: (a: T) => T) => T[]
>T : T
>x : (a: T) => T
>a : T
>T : T
>T : T
><T[]>null : T[]
>T : T
>null : null

var r17 = foo17(r17arg);
>r17 : any
>foo17(r17arg) : any
>foo17 : { (a17: { <T extends Derived>(x: (a: T) => T): T[]; <T extends Base>(x: (a: T) => T): T[]; }): any; (a: any): any; }
>r17arg : <T>(x: (a: T) => T) => T[]

var r18arg = (x: <T>(a: T) => T) => <any[]>null;
>r18arg : (x: <T>(a: T) => T) => any[]
>(x: <T>(a: T) => T) => <any[]>null : (x: <T>(a: T) => T) => any[]
>x : <T>(a: T) => T
>T : T
>a : T
>T : T
>T : T
><any[]>null : any[]
>null : null

var r18 = foo18(r18arg);
>r18 : any
>foo18(r18arg) : any
>foo18 : { (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[]; }): any; (a: any): any; }
>r18arg : (x: <T>(a: T) => T) => any[]