=== tests/cases/compiler/unaryPlus.ts ===
// allowed per spec
var a = +1;
>a : number, Symbol(a, Decl(unaryPlus.ts, 1, 3))
>+1 : number
>1 : number

var b = +(<any>"");
>b : number, Symbol(b, Decl(unaryPlus.ts, 2, 3))
>+(<any>"") : number
>(<any>"") : any
><any>"" : any
>"" : string

enum E { some, thing };
>E : E, Symbol(E, Decl(unaryPlus.ts, 2, 19))
>some : E, Symbol(E.some, Decl(unaryPlus.ts, 3, 8))
>thing : E, Symbol(E.thing, Decl(unaryPlus.ts, 3, 14))

var c = +E.some;
>c : number, Symbol(c, Decl(unaryPlus.ts, 4, 3))
>+E.some : number
>E.some : E, Symbol(E.some, Decl(unaryPlus.ts, 3, 8))
>E : typeof E, Symbol(E, Decl(unaryPlus.ts, 2, 19))
>some : E, Symbol(E.some, Decl(unaryPlus.ts, 3, 8))

// also allowed, used to be errors
var x = +"3"; //should be valid
>x : number, Symbol(x, Decl(unaryPlus.ts, 7, 3))
>+"3" : number
>"3" : string

var y = -"3"; // should be valid
>y : number, Symbol(y, Decl(unaryPlus.ts, 8, 3))
>-"3" : number
>"3" : string

var z = ~"3"; // should be valid
>z : number, Symbol(z, Decl(unaryPlus.ts, 9, 3))
>~"3" : number
>"3" : string