Bitflags
C++ class for storing bit flags. Flag names are taken from 'enum class'. Type-safe bit operations (prevents using flags from different enums).
Install / Use
/learn @DmitrySokolov/BitflagsREADME
bitflags
C++ class for storing bit flags. Flag names are taken from 'enum class'. Type-safe bit operations (prevents using flags from different enums).
#include <iostream>
#include "bitflags.h"
using bf::bitflags;
namespace my {
enum class Flags {
kFlagA,
kFlagB,
kFlagC,
kLastElement_ // there should be no flags after this element
}; // enum class Flags
enum class OtherFlags {
kFlagX,
kFlagY,
kFlagZ,
kLastElement_ // there should be no flags after this element
}; // enum class OtherFlags
using bf::operator|;
using bf::operator&;
using bf::operator~;
} // namespace my
int main()
{
auto f = bitflags<my::Flags>{};
f.set(my::Flags::kFlagA);
std::cout << "Flags: " << f.to_string() << std::endl;
if (f.any(my::Flags::kFlagA | my::Flags::kFlagB)) {
std::cout << "Flags: any..." << f.to_string() << std::endl;
}
f |= my::Flags::kFlagB | my::Flags::kFlagC;
if (f.all()) {
std::cout << "Flags: all..." << f.to_string() << std::endl;
}
f.reset();
if (f.none()) {
std::cout << "Flags: none..." << f.to_string() << std::endl;
}
// Compile error:
// f |= my::Flags::kFlagA | my::OtherFlags::kFlagX
return 0;
}
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