=== tests/cases/conformance/types/union/contextualTypeWithUnionTypeIndexSignatures.ts ===
//When used as a contextual type, a union type U has those members that are present in any of 
// its constituent types, with types that are unions of the respective members in the constituent types. 
interface SomeType {
>SomeType : SomeType

    (a: number): number;
>a : number
}
interface SomeType2 {
>SomeType2 : SomeType2

    (a: number): string;
>a : number
}

interface IWithNoStringIndexSignature {
>IWithNoStringIndexSignature : IWithNoStringIndexSignature

    foo: string;
>foo : string
}
interface IWithNoNumberIndexSignature {
>IWithNoNumberIndexSignature : IWithNoNumberIndexSignature

    0: string;
}
interface IWithStringIndexSignature1 {
>IWithStringIndexSignature1 : IWithStringIndexSignature1

    [a: string]: SomeType;
>a : string
>SomeType : SomeType
}
interface IWithStringIndexSignature2 {
>IWithStringIndexSignature2 : IWithStringIndexSignature2

    [a: string]: SomeType2;
>a : string
>SomeType2 : SomeType2
}
interface IWithNumberIndexSignature1 {
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1

    [a: number]: SomeType;
>a : number
>SomeType : SomeType
}
interface IWithNumberIndexSignature2 {
>IWithNumberIndexSignature2 : IWithNumberIndexSignature2

    [a: number]: SomeType2;
>a : number
>SomeType2 : SomeType2
}

// When an object literal is contextually typed by a type that includes a string index signature, 
// the resulting type of the object literal includes a string index signature with the union type of 
// the types of the properties declared in the object literal, or the Undefined type if the object literal 
// is empty.Likewise, when an object literal is contextually typed by a type that includes a numeric index 
// signature, the resulting type of the object literal includes a numeric index signature with the union type
// of the types of the numerically named properties(section 3.7.4) declared in the object literal, 
// or the Undefined type if the object literal declares no numerically named properties.

// Let S be the set of types in U that has a string index signature.
// If S is not empty, U has a string index signature of a union type of 
// the types of the string index signatures from each type in S.
var x: IWithNoStringIndexSignature | IWithStringIndexSignature1 = { z: a => a }; // a should be number
>x : IWithNoStringIndexSignature | IWithStringIndexSignature1
>IWithNoStringIndexSignature : IWithNoStringIndexSignature
>IWithStringIndexSignature1 : IWithStringIndexSignature1
>{ z: a => a } : { [x: string]: (a: number) => number; z: (a: number) => number; }
>z : (a: number) => number
>a => a : (a: number) => number
>a : number
>a : number

var x: IWithNoStringIndexSignature | IWithStringIndexSignature1 = { foo: a => a }; // a should be any
>x : IWithNoStringIndexSignature | IWithStringIndexSignature1
>IWithNoStringIndexSignature : IWithNoStringIndexSignature
>IWithStringIndexSignature1 : IWithStringIndexSignature1
>{ foo: a => a } : { [x: string]: (a: any) => any; foo: (a: any) => any; }
>foo : (a: any) => any
>a => a : (a: any) => any
>a : any
>a : any

var x: IWithNoStringIndexSignature | IWithStringIndexSignature1 = { foo: "hello" }; 
>x : IWithNoStringIndexSignature | IWithStringIndexSignature1
>IWithNoStringIndexSignature : IWithNoStringIndexSignature
>IWithStringIndexSignature1 : IWithStringIndexSignature1
>{ foo: "hello" } : { [x: string]: string; foo: string; }
>foo : string

var x2: IWithStringIndexSignature1 | IWithStringIndexSignature2 = { z: a => a.toString() }; // a should be number
>x2 : IWithStringIndexSignature1 | IWithStringIndexSignature2
>IWithStringIndexSignature1 : IWithStringIndexSignature1
>IWithStringIndexSignature2 : IWithStringIndexSignature2
>{ z: a => a.toString() } : { [x: string]: (a: number) => string; z: (a: number) => string; }
>z : (a: number) => string
>a => a.toString() : (a: number) => string
>a : number
>a.toString() : string
>a.toString : (radix?: number) => string
>a : number
>toString : (radix?: number) => string

var x2: IWithStringIndexSignature1 | IWithStringIndexSignature2 = { z: a => a }; // a should be number
>x2 : IWithStringIndexSignature1 | IWithStringIndexSignature2
>IWithStringIndexSignature1 : IWithStringIndexSignature1
>IWithStringIndexSignature2 : IWithStringIndexSignature2
>{ z: a => a } : { [x: string]: (a: number) => number; z: (a: number) => number; }
>z : (a: number) => number
>a => a : (a: number) => number
>a : number
>a : number


// Let S be the set of types in U that has a numeric index signature.
// If S is not empty, U has a numeric index signature of a union type of 
// the types of the numeric index signatures from each type in S.
var x3: IWithNoNumberIndexSignature | IWithNumberIndexSignature1 = { 1: a => a }; // a should be number
>x3 : IWithNoNumberIndexSignature | IWithNumberIndexSignature1
>IWithNoNumberIndexSignature : IWithNoNumberIndexSignature
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1
>{ 1: a => a } : { [x: number]: (a: number) => number; 1: (a: number) => number; }
>a => a : (a: number) => number
>a : number
>a : number

var x3: IWithNoNumberIndexSignature | IWithNumberIndexSignature1 = { 0: a => a }; // a should be any
>x3 : IWithNoNumberIndexSignature | IWithNumberIndexSignature1
>IWithNoNumberIndexSignature : IWithNoNumberIndexSignature
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1
>{ 0: a => a } : { [x: number]: (a: any) => any; 0: (a: any) => any; }
>a => a : (a: any) => any
>a : any
>a : any

var x3: IWithNoNumberIndexSignature | IWithNumberIndexSignature1 = { 0: "hello" };
>x3 : IWithNoNumberIndexSignature | IWithNumberIndexSignature1
>IWithNoNumberIndexSignature : IWithNoNumberIndexSignature
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1
>{ 0: "hello" } : { [x: number]: string; 0: string; }

var x4: IWithNumberIndexSignature1 | IWithNumberIndexSignature2 = { 1: a => a.toString() }; // a should be number
>x4 : IWithNumberIndexSignature1 | IWithNumberIndexSignature2
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1
>IWithNumberIndexSignature2 : IWithNumberIndexSignature2
>{ 1: a => a.toString() } : { [x: number]: (a: number) => string; 1: (a: number) => string; }
>a => a.toString() : (a: number) => string
>a : number
>a.toString() : string
>a.toString : (radix?: number) => string
>a : number
>toString : (radix?: number) => string

var x4: IWithNumberIndexSignature1 | IWithNumberIndexSignature2 = { 1: a => a }; // a should be number
>x4 : IWithNumberIndexSignature1 | IWithNumberIndexSignature2
>IWithNumberIndexSignature1 : IWithNumberIndexSignature1
>IWithNumberIndexSignature2 : IWithNumberIndexSignature2
>{ 1: a => a } : { [x: number]: (a: number) => number; 1: (a: number) => number; }
>a => a : (a: number) => number
>a : number
>a : number