isNumeric

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

template isNumeric (

) {

static if(!__traits(isArithmetic, T))

enum isNumeric;

static if(!(!__traits(isArithmetic, T)))

static if(__traits(isFloating, T))

enum isNumeric;

static if(!(!__traits(isArithmetic, T)))

static if(!(__traits(isFloating, T)))

static if(is(T U == enum))

enum isNumeric;

static if(!(!__traits(isArithmetic, T)))

static if(!(__traits(isFloating, T)))

static if(!(is(T U == enum)))

enum isNumeric;

}

Examples

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(!isNumeric!S);

isNumeric

Examples

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