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add constexpr containers (#187)

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Bela Schaum 2023-01-17 15:59:37 +01:00 • committed by GitHub
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10 changed files with 2609 additions and 7 deletions
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3
example/CMakeLists.txt
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@ -19,6 +19,9 @@ endfunction()
make_example(example)
make_example(enum_flag_example)
make_example(example_containers_array)
make_example(example_containers_bitset)
make_example(example_containers_set)
make_example(example_custom_name)
make_example(example_switch)
if(MAGIC_ENUM_OPT_ENABLE_NONASCII)

61
example/example_containers_array.cpp Normal file
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@ -0,0 +1,61 @@
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
// SPDX-License-Identifier: MIT
// Copyright (c) 2019 - 2022 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_containers.hpp>
enum class Color { RED = 1, GREEN = 2, BLUE = 4 };
struct RGB {
std::uint8_t r {};
std::uint8_t g {};
std::uint8_t b {};
[[nodiscard]] constexpr bool empty() { return std::equal_to{}(r, g) && std::equal_to{}(g, b) && std::equal_to{}(b, 0); }
[[nodiscard]] constexpr bool operator==(RGB rgb) const noexcept { return std::equal_to{}(r, rgb.r) && std::equal_to{}(g, rgb.g) && std::equal_to{}(b, rgb.b); }
friend std::ostream& operator<<(std::ostream& ostream, RGB rgb) {
ostream << "R=" << static_cast<std::uint32_t>(rgb.r) << " G=" << static_cast<std::uint32_t>(rgb.g) << " B=" << static_cast<std::uint32_t>(rgb.b);
return ostream;
}
};
constexpr std::uint8_t color_max = std::numeric_limits<std::uint8_t>::max();
int main() {
constexpr magic_enum::containers::array<Color, RGB> color_rgb_initializer {{{{color_max, 0, 0}, {0, color_max, 0}, {0, 0, color_max}}}};
std::cout << std::get<0>(color_rgb_initializer) << std::endl; // R=255 G=0 B=0
std::cout << std::get<1>(color_rgb_initializer) << std::endl; // R=0 G=255 B=0
std::cout << std::get<2>(color_rgb_initializer) << std::endl; // R=0 G=0 B=255
std::cout << std::get<Color::RED>(color_rgb_initializer) << std::endl; // R=255 G=0 B=0
std::cout << std::get<Color::GREEN>(color_rgb_initializer) << std::endl; // R=0 G=255 B=0
std::cout << std::get<Color::BLUE>(color_rgb_initializer) << std::endl; // R=0 G=0 B=255
return 0;
}

51
example/example_containers_bitset.cpp Normal file
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@ -0,0 +1,51 @@
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
// SPDX-License-Identifier: MIT
// Copyright (c) 2019 - 2022 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.
#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable : 4244) // warning C4244: 'argument': conversion from 'const T' to 'unsigned int', possible loss of data.
#endif
#include <iostream>
#include <magic_enum_containers.hpp>
enum class Color { RED = 1, GREEN = 2, BLUE = 4 };
int main() {
auto color_bitset = magic_enum::containers::bitset<Color>();
color_bitset.set(Color::GREEN);
color_bitset.set(Color::BLUE);
std::cout << std::boolalpha;
std::cout << color_bitset.size() << std::endl; // 3 == magic_enum::enum_count<Color>()
std::cout << color_bitset.all() << std::endl; // false
std::cout << color_bitset.any() << std::endl; // true
std::cout << color_bitset.none() << std::endl; // false
std::cout << color_bitset.count() << std::endl; // 2
std::cout << color_bitset.test(Color::RED) << std::endl; // false
std::cout << color_bitset.test(Color::GREEN) << std::endl; // true
std::cout << color_bitset.test(Color::BLUE) << std::endl; // true
return 0;
}

55
example/example_containers_set.cpp Normal file
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@ -0,0 +1,55 @@
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
// SPDX-License-Identifier: MIT
// Copyright (c) 2019 - 2022 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.
#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable : 4244) // warning C4244: 'argument': conversion from 'const T' to 'unsigned int', possible loss of data.
#endif
#ifdef _WIN32
#define _ITERATOR_DEBUG_LEVEL 0
#endif
#include <iostream>
#include <magic_enum_containers.hpp>
enum class Color { RED = 1, GREEN = 2, BLUE = 4 };
int main() {
std::cout << std::boolalpha;
magic_enum::containers::set color_set {Color::RED, Color::GREEN, Color::BLUE};
std::cout << color_set.empty() << std::endl; // false
std::cout << color_set.size() << std::endl; // 3
color_set.clear();
std::cout << color_set.empty() << std::endl; // true
std::cout << color_set.size() << std::endl; // 0
color_set.insert(Color::GREEN);
color_set.insert(Color::BLUE);
std::cout << color_set.empty() << std::endl; // false
std::cout << color_set.size() << std::endl; // 2
return 0;
}