flags

A simple type-safe flag template library in C++

usage

Define a flags type and flag values::

#include "type_safe_flags.hpp"

using flags::operator ""_bit;
using colour_flags_t = flags::bitfield_flag<std::uint8_t, struct color_flag_tag>;

constexpr colour_flags_t red   = 0_bit;
constexpr colour_flags_t green = 1_bit;
constexpr colour_flags_t blue  = 2_bit;
constexpr colour_flags_t alpha = 3_bit;

Use flags::

colour_flags_t f = ...;
if (flags & red) {
	...
}
std::cout << f << "\n";

void fun(colour_flags_t);

fun(red | green);
fun({}); // zero, no flag set