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Enum member `std.traits.isNumeric`

Detect whether T is a built-in numeric type (integral or floating point).


						
				enum isNumeric(T)
				 = __traits(isArithmetic, T) && !(is(immutable(T) == immutable(bool)) || is(immutable(T) == immutable(char)) || is(immutable(T) == immutable(wchar)) || is(immutable(T) == immutable(dchar)));

Example

static assert(
    isNumeric!byte &&
    isNumeric!short &&
    isNumeric!int &&
    isNumeric!long &&
    isNumeric!float &&
    isNumeric!double &&
    isNumeric!real &&
    isNumeric!(const(real)) &&
    isNumeric!(immutable(real))
);

static assert(
    !isNumeric!void &&
    !isNumeric!bool &&
    !isNumeric!char &&
    !isNumeric!wchar &&
    !isNumeric!dchar
);

// types which act as numeric values do not pass
struct S
{
    int val;
    alias val this;
}

static assert(!isIntegral!S);

Authors

Walter Bright, Tomasz Stachowiak (isExpressions), Andrei Alexandrescu, Shin Fujishiro, Robert Clipsham, David Nadlinger, Kenji Hara, Shoichi Kato

License

Boost License 1.0.