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

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

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

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

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

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

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