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//// [contextualTypeWithUnionTypeCallSignatures.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.
// Let S be the set of types in U that have call signatures.
// If S is not empty and the sets of call signatures of the types in S are identical ignoring return types,
// U has the same set of call signatures, but with return types that are unions of the return types of the respective call signatures from each type in S.
interface IWithNoCallSignatures {
foo : string ;
}
interface IWithCallSignatures {
( a : number ) : string ;
}
interface IWithCallSignatures2 {
( a : number ) : number ;
}
interface IWithCallSignatures3 {
( b : string ) : number ;
}
interface IWithCallSignatures4 {
( a : number ) : string ;
( a : string , b : number ) : number ;
}
// With no call signature | callSignatures
var x : IWithNoCallSignatures | IWithCallSignatures = a => a . toString ( ) ;
// With call signatures with different return type
var x2 : IWithCallSignatures | IWithCallSignatures2 = a => a . toString ( ) ; // Like iWithCallSignatures
var x2 : IWithCallSignatures | IWithCallSignatures2 = a => a ; // Like iWithCallSignatures2
// With call signatures of mismatching parameter type
var x3 : IWithCallSignatures | IWithCallSignatures3 = a => /*here a should be any*/ a . toString ( ) ;
// With call signature count mismatch
var x4 : IWithCallSignatures | IWithCallSignatures4 = a => /*here a should be any*/ a . toString ( ) ;
//// [contextualTypeWithUnionTypeCallSignatures.js]
//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.
// With no call signature | callSignatures
var x = function ( a ) { return a . toString ( ) ; } ;
// With call signatures with different return type
var x2 = function ( a ) { return a . toString ( ) ; } ; // Like iWithCallSignatures
var x2 = function ( a ) { return a ; } ; // Like iWithCallSignatures2
// With call signatures of mismatching parameter type
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var x3 = function ( a ) { return a . toString ( ) ; } ;
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// With call signature count mismatch
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var x4 = function ( a ) { return a . toString ( ) ; } ;