isNumeric

1 // Some types which are numeric types.
2 static assert( isNumeric!byte);
3 static assert( isNumeric!ubyte);
4 static assert( isNumeric!short);
5 static assert( isNumeric!ushort);
6 static assert( isNumeric!int);
7 static assert( isNumeric!uint);
8 static assert( isNumeric!long);
9 static assert( isNumeric!ulong);
10 static assert( isNumeric!float);
11 static assert( isNumeric!double);
12 static assert( isNumeric!real);
13 
14 static assert( isNumeric!(const short));
15 static assert( isNumeric!(immutable int));
16 static assert( isNumeric!(inout uint));
17 static assert( isNumeric!(shared long));
18 static assert( isNumeric!(const shared real));
19 
20 static assert( isNumeric!(typeof(42)));
21 static assert( isNumeric!(typeof(1234657890L)));
22 static assert( isNumeric!(typeof(42.0)));
23 static assert( isNumeric!(typeof(42f)));
24 static assert( isNumeric!(typeof(1e5)));
25 static assert( isNumeric!(typeof(97.4L)));
26 
27 int i;
28 static assert( isNumeric!(typeof(i)));
29 
30 // Some types which aren't numeric types.
31 static assert(!isNumeric!bool);
32 static assert(!isNumeric!char);
33 static assert(!isNumeric!dchar);
34 static assert(!isNumeric!(int[]));
35 static assert(!isNumeric!(double[4]));
36 static assert(!isNumeric!(real*));
37 static assert(!isNumeric!string);
38 
39 static struct S
40 {
41     int i;
42 }
43 static assert(!isNumeric!S);
44 
45 // The struct itself isn't considered a numeric type,
46 // but its member variable is when checked directly.
47 static assert( isNumeric!(typeof(S.i)));
48 
49 enum E : int
50 {
51     a = 42
52 }
53 
54 // Enums do not count.
55 static assert(!isNumeric!E);
56 
57 static struct AliasThis
58 {
59     int i;
60     alias this = i;
61 }
62 
63 // Other implicit conversions do not count.
64 static assert(!isNumeric!AliasThis);