=== tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithOptionalParameters2.ts ===
// Optional parameters should be valid in all the below casts

function foo(x?: number);
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 0, 0), Decl(callSignaturesWithOptionalParameters2.ts, 2, 25))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 2, 13))

function foo(x?: number) { }
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 0, 0), Decl(callSignaturesWithOptionalParameters2.ts, 2, 25))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 3, 13))

foo(1);
>foo(1) : any
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 0, 0), Decl(callSignaturesWithOptionalParameters2.ts, 2, 25))
>1 : number

foo();
>foo() : any
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 0, 0), Decl(callSignaturesWithOptionalParameters2.ts, 2, 25))

function foo2(x: number);
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 6, 6), Decl(callSignaturesWithOptionalParameters2.ts, 8, 25), Decl(callSignaturesWithOptionalParameters2.ts, 9, 37))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 8, 14))

function foo2(x: number, y?: number);
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 6, 6), Decl(callSignaturesWithOptionalParameters2.ts, 8, 25), Decl(callSignaturesWithOptionalParameters2.ts, 9, 37))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 9, 14))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 9, 24))

function foo2(x: number, y?: number) { }
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 6, 6), Decl(callSignaturesWithOptionalParameters2.ts, 8, 25), Decl(callSignaturesWithOptionalParameters2.ts, 9, 37))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 10, 14))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 10, 24))

foo2(1);
>foo2(1) : any
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 6, 6), Decl(callSignaturesWithOptionalParameters2.ts, 8, 25), Decl(callSignaturesWithOptionalParameters2.ts, 9, 37))
>1 : number

foo2(1, 2);
>foo2(1, 2) : any
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 6, 6), Decl(callSignaturesWithOptionalParameters2.ts, 8, 25), Decl(callSignaturesWithOptionalParameters2.ts, 9, 37))
>1 : number
>2 : number

class C {
>C : C, Symbol(C, Decl(callSignaturesWithOptionalParameters2.ts, 13, 11))

    foo(x?: number);
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 16, 8))

    foo(x?: number) { }
>foo : (x?: number) => any, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 17, 8))

    foo2(x: number);
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 19, 9))

    foo2(x: number, y?: number);
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 20, 9))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 20, 19))

    foo2(x: number, y?: number) { }
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 21, 9))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 21, 19))
}

var c: C;
>c : C, Symbol(c, Decl(callSignaturesWithOptionalParameters2.ts, 24, 3))
>C : C, Symbol(C, Decl(callSignaturesWithOptionalParameters2.ts, 13, 11))

c.foo();
>c.foo() : any
>c.foo : (x?: number) => any, Symbol(C.foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))
>c : C, Symbol(c, Decl(callSignaturesWithOptionalParameters2.ts, 24, 3))
>foo : (x?: number) => any, Symbol(C.foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))

c.foo(1);
>c.foo(1) : any
>c.foo : (x?: number) => any, Symbol(C.foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))
>c : C, Symbol(c, Decl(callSignaturesWithOptionalParameters2.ts, 24, 3))
>foo : (x?: number) => any, Symbol(C.foo, Decl(callSignaturesWithOptionalParameters2.ts, 15, 9), Decl(callSignaturesWithOptionalParameters2.ts, 16, 20))
>1 : number

c.foo2(1);
>c.foo2(1) : any
>c.foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(C.foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>c : C, Symbol(c, Decl(callSignaturesWithOptionalParameters2.ts, 24, 3))
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(C.foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>1 : number

c.foo2(1, 2);
>c.foo2(1, 2) : any
>c.foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(C.foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>c : C, Symbol(c, Decl(callSignaturesWithOptionalParameters2.ts, 24, 3))
>foo2 : { (x: number): any; (x: number, y?: number): any; }, Symbol(C.foo2, Decl(callSignaturesWithOptionalParameters2.ts, 17, 23), Decl(callSignaturesWithOptionalParameters2.ts, 19, 20), Decl(callSignaturesWithOptionalParameters2.ts, 20, 32))
>1 : number
>2 : number

interface I {
>I : I, Symbol(I, Decl(callSignaturesWithOptionalParameters2.ts, 29, 13))

    (x?: number);
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 32, 5))

    (x?: number, y?: number);
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 33, 5))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 33, 16))

    foo(x: number, y?: number);
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 34, 8))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 34, 18))

    foo(x: number, y?: number, z?: number);
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 35, 8))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 35, 18))
>z : number, Symbol(z, Decl(callSignaturesWithOptionalParameters2.ts, 35, 30))
}

var i: I;
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>I : I, Symbol(I, Decl(callSignaturesWithOptionalParameters2.ts, 29, 13))

i();
>i() : any
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))

i(1);
>i(1) : any
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>1 : number

i(1, 2);
>i(1, 2) : any
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>1 : number
>2 : number

i.foo(1);
>i.foo(1) : any
>i.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>1 : number

i.foo(1, 2);
>i.foo(1, 2) : any
>i.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>1 : number
>2 : number

i.foo(1, 2, 3);
>i.foo(1, 2, 3) : any
>i.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>i : I, Symbol(i, Decl(callSignaturesWithOptionalParameters2.ts, 38, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(I.foo, Decl(callSignaturesWithOptionalParameters2.ts, 33, 29), Decl(callSignaturesWithOptionalParameters2.ts, 34, 31))
>1 : number
>2 : number
>3 : number

var a: {
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))

    (x?: number);
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 47, 5))

    (x?: number, y?: number);
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 48, 5))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 48, 16))

    foo(x: number, y?: number);
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 49, 8))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 49, 18))

    foo(x: number, y?: number, z?: number);
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>x : number, Symbol(x, Decl(callSignaturesWithOptionalParameters2.ts, 50, 8))
>y : number, Symbol(y, Decl(callSignaturesWithOptionalParameters2.ts, 50, 18))
>z : number, Symbol(z, Decl(callSignaturesWithOptionalParameters2.ts, 50, 30))
}

a();
>a() : any
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))

a(1);
>a(1) : any
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))
>1 : number

a(1, 2);
>a(1, 2) : any
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))
>1 : number
>2 : number

a.foo(1);
>a.foo(1) : any
>a.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>1 : number

a.foo(1, 2);
>a.foo(1, 2) : any
>a.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>1 : number
>2 : number

a.foo(1, 2, 3);
>a.foo(1, 2, 3) : any
>a.foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>a : { (x?: number): any; (x?: number, y?: number): any; foo(x: number, y?: number): any; foo(x: number, y?: number, z?: number): any; }, Symbol(a, Decl(callSignaturesWithOptionalParameters2.ts, 46, 3))
>foo : { (x: number, y?: number): any; (x: number, y?: number, z?: number): any; }, Symbol(foo, Decl(callSignaturesWithOptionalParameters2.ts, 48, 29), Decl(callSignaturesWithOptionalParameters2.ts, 49, 31))
>1 : number
>2 : number
>3 : number