mirror of
https://github.com/Neargye/magic_enum.git
synced 2026-01-09 23:34:23 +00:00
116 lines
4.6 KiB
C++
116 lines
4.6 KiB
C++
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
|
|
// SPDX-License-Identifier: MIT
|
|
// Copyright (c) 2019 Daniil Goncharov <neargye@gmail.com>.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
|
|
#include <iostream>
|
|
|
|
#include <magic_enum.hpp>
|
|
|
|
enum class Color : int { RED = -10, BLUE = 0, GREEN = 10 };
|
|
|
|
int main() {
|
|
// Enum variable to string name.
|
|
Color c1 = Color::RED;
|
|
auto c1_name = magic_enum::enum_name(c1);
|
|
std::cout << c1_name << std::endl; // RED
|
|
|
|
// String enum name sequence.
|
|
constexpr auto& color_names = magic_enum::enum_names<Color>();
|
|
std::cout << "Color names:";
|
|
for (auto n : color_names) {
|
|
std::cout << " " << n;
|
|
}
|
|
std::cout << std::endl;
|
|
// Color names: RED BLUE GREEN
|
|
|
|
// String name to enum value.
|
|
auto c2 = magic_enum::enum_cast<Color>("BLUE");
|
|
if (c2.has_value() && c2.value() == Color::BLUE) {
|
|
std::cout << "BLUE = " << static_cast<int>(c2.value()) << std::endl; // BLUE = 0
|
|
}
|
|
|
|
// Integer value to enum value.
|
|
auto c3 = magic_enum::enum_cast<Color>(10);
|
|
if (c3.has_value() && c3.value() == Color::GREEN) {
|
|
std::cout << "GREEN = " << magic_enum::enum_integer(c3.value()) << std::endl; // GREEN = 10
|
|
}
|
|
|
|
// Enum value to integer value.
|
|
auto color_integer = magic_enum::enum_integer(Color::RED);
|
|
if (color_integer == static_cast<std::underlying_type_t<Color>>(Color::RED)) {
|
|
std::cout << "RED = " << color_integer << std::endl; // RED = -10
|
|
}
|
|
|
|
using namespace magic_enum::ostream_operators; // out-of-the-box ostream operator for enums.
|
|
// ostream operator for enum.
|
|
std::cout << "Color: " << c1 << " " << c2 << " " << c3 << std::endl; // Color: RED BLUE GREEN
|
|
|
|
// Number of enum values.
|
|
std::cout << "Color enum size: " << magic_enum::enum_count<Color>() << std::endl; // Color enum size: 3
|
|
|
|
// Indexed access to enum value.
|
|
std::cout << "Color[0] = " << magic_enum::enum_value<Color>(0) << std::endl; // Color[0] = RED
|
|
|
|
// Enum value sequence.
|
|
constexpr auto& colors = magic_enum::enum_values<Color>();
|
|
std::cout << "Colors sequence:";
|
|
for (Color c : colors) {
|
|
std::cout << " " << c; // ostream operator for enum.
|
|
}
|
|
std::cout << std::endl;
|
|
// Color sequence: RED BLUE GREEN
|
|
|
|
enum class Flags { A = 1 << 0, B = 1 << 1, C = 1 << 2, D = 1 << 3 };
|
|
using namespace magic_enum::bitwise_operators; // out-of-the-box bitwise operators for enums.
|
|
// Support operators: ~, |, &, ^, |=, &=, ^=.
|
|
Flags flags = Flags::A & ~Flags::C;
|
|
std::cout << flags << std::endl;
|
|
|
|
enum color { red, green, blue };
|
|
|
|
// Checks whether type is an Unscoped enumeration.
|
|
static_assert(magic_enum::is_unscoped_enum_v<color>);
|
|
static_assert(!magic_enum::is_unscoped_enum_v<Color>);
|
|
static_assert(!magic_enum::is_unscoped_enum_v<Flags>);
|
|
|
|
// Checks whether type is an Scoped enumeration.
|
|
static_assert(!magic_enum::is_scoped_enum_v<color>);
|
|
static_assert(magic_enum::is_scoped_enum_v<Color>);
|
|
static_assert(magic_enum::is_scoped_enum_v<Flags>);
|
|
|
|
// Checks whether type is an Fixed enumeration.
|
|
#if defined(_MSC_VER) && _MSC_VER != 1923 // MSVC bug, we can not check is enum fixed
|
|
static_assert(!magic_enum::is_fixed_enum_v<color>);
|
|
static_assert(magic_enum::is_fixed_enum_v<Color>);
|
|
static_assert(magic_enum::is_fixed_enum_v<Flags>);
|
|
#endif
|
|
|
|
// Enum pair (value enum, string enum name) sequence.
|
|
constexpr auto color_entries = magic_enum::enum_entries<Color>();
|
|
std::cout << "Colors entries:";
|
|
for (auto& e : color_entries) {
|
|
std::cout << " " << e.second << " = " << static_cast<int>(e.first);
|
|
}
|
|
std::cout << std::endl;
|
|
// Color entries: RED = -10 BLUE = 0 GREEN = 10
|
|
|
|
return 0;
|
|
}
|