Select

1 // can select types
2 static assert(is(Select!(true, int, long) == int));
3 static assert(is(Select!(false, int, long) == long));
4 static struct Foo {}
5 static assert(is(Select!(false, const(int), const(Foo)) == const(Foo)));
6 
7 // can select symbols
8 int a = 1;
9 int b = 2;
10 alias selA = Select!(true, a, b);
11 alias selB = Select!(false, a, b);
12 assert(selA == 1);
13 assert(selB == 2);
14 
15 // can select (compile-time) expressions
16 enum val = Select!(false, -4, 9 - 6);
17 static assert(val == 3);