![]() |
magic_enum package from magic_enum repomagic_enum |
|
Package Summary
Tags | No category tags. |
Version | 0.8.2 |
License | MIT |
Build type | CMAKE |
Use | RECOMMENDED |
Repository Summary
Checkout URI | https://github.com/Neargye/magic_enum.git |
VCS Type | git |
VCS Version | master |
Last Updated | 2022-12-20 |
Dev Status | MAINTAINED |
CI status | No Continuous Integration |
Released | RELEASED |
Tags | No category tags. |
Contributing |
Help Wanted (0)
Good First Issues (0) Pull Requests to Review (0) |
Package Description
Additional Links
Maintainers
- Neargye
Authors
__ __ _ ______ _____
| \/ | (_) | ____| / ____|_ _
| \ / | __ _ __ _ _ ___ | |__ _ __ _ _ _ __ ___ | | _| |_ _| |_
| |\/| |/ _` |/ _` | |/ __| | __| | '_ \| | | | '_ ` _ \ | | |_ _|_ _|
| | | | (_| | (_| | | (__ | |____| | | | |_| | | | | | | | |____|_| |_|
|_| |_|\__,_|\__, |_|\___| |______|_| |_|\__,_|_| |_| |_| \_____|
__/ |
|___/
Magic Enum C++
Header-only C++17 library provides static reflection for enums, work with any enum type without any macro or boilerplate code.
-
enum_cast
obtains enum value from string or integer. -
enum_value
returns enum value at specified index. -
enum_values
obtains enum value sequence. -
enum_count
returns number of enum values. -
enum_integer
obtains integer value from enum value. -
enum_name
returns name from enum value. -
enum_names
obtains string enum name sequence. -
enum_entries
obtains pair (value enum, string enum name) sequence. -
enum_index
obtains index in enum value sequence from enum value. -
enum_contains
checks whether enum contains enumerator with such value. -
enum_type_name
returns name of enum type. -
enum_fuse
allows multidimensional switch/cases. -
enum_switch
allows runtime enum value transformation to constexpr context. -
enum_for_each
calls a function with all enum constexpr value. -
is_unscoped_enum
checks whether type is an Unscoped enumeration. -
is_scoped_enum
checks whether type is an Scoped enumeration. -
underlying_type
improved UB-free "SFINAE-friendly" underlying_type. -
ostream_operators
ostream operators for enums. -
bitwise_operators
bitwise operators for enums.
Documentation
Features
- C++17
- Header-only
- Dependency-free
- Compile-time
- Enum to string
- String to enum
- Iterating over enum
Examples
- Enum value to string
Color color = Color::RED;
auto color_name = magic_enum::enum_name(color);
// color_name -> "RED"
- String to enum value
std::string color_name{"GREEN"};
auto color = magic_enum::enum_cast<Color>(color_name);
if (color.has_value()) {
// color.value() -> Color::GREEN
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Integer to enum value
int color_integer = 2;
auto color = magic_enum::enum_cast<Color>(color_integer);
if (color.has_value()) {
// color.value() -> Color::BLUE
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Indexed access to enum value
std::size_t i = 0;
Color color = magic_enum::enum_value<Color>(i);
// color -> Color::RED
- Enum value sequence
constexpr auto colors = magic_enum::enum_values<Color>();
// colors -> {Color::RED, Color::BLUE, Color::GREEN}
// colors[0] -> Color::RED
- Number of enum elements
constexpr std::size_t color_count = magic_enum::enum_count<Color>();
// color_count -> 3
- Enum value to integer
Color color = Color::RED;
auto color_integer = magic_enum::enum_integer(color);
// color -> 1
- Enum names sequence
constexpr auto color_names = magic_enum::enum_names<Color>();
// color_names -> {"RED", "BLUE", "GREEN"}
// color_names[0] -> "RED"
- Enum entries sequence
constexpr auto color_entries = magic_enum::enum_entries<Color>();
// color_entries -> {{Color::RED, "RED"}, {Color::BLUE, "BLUE"}, {Color::GREEN, "GREEN"}}
// color_entries[0].first -> Color::RED
// color_entries[0].second -> "RED"
- Enum fusion for multi-level switch/case statements
switch (magic_enum::enum_fuse(color, direction).value()) {
case magic_enum::enum_fuse(Color::RED, Directions::Up).value(): // ...
case magic_enum::enum_fuse(Color::BLUE, Directions::Down).value(): // ...
// ...
}
- Enum switch runtime value as constexpr constant
Color color = Color::RED;
magic_enum::enum_switch([] (auto val) {
constexpr Color c_color = val;
// ...
}, color);
- Enum iterate for each enum as constexpr constant
magic_enum::enum_for_each<Color>([] (auto val) {
constexpr Color c_color = val;
// ...
});
- Ostream operator for enum
using namespace magic_enum::ostream_operators; // out-of-the-box ostream operators for enums.
Color color = Color::BLUE;
std::cout << color << std::endl; // "BLUE"
- Bitwise operator for enum
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::B & ~Flags::C;
- Checks whether type is an Unscoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_unscoped_enum<color>::value -> true
magic_enum::is_unscoped_enum<direction>::value -> false
magic_enum::is_unscoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_unscoped_enum_v<color> -> true
- Checks whether type is an Scoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_scoped_enum<color>::value -> false
magic_enum::is_scoped_enum<direction>::value -> true
magic_enum::is_scoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_scoped_enum_v<direction> -> true
- Static storage enum variable to string This version is much lighter on the compile times and is not restricted to the enum_range limitation.
constexpr Color color = Color::BLUE;
constexpr auto color_name = magic_enum::enum_name<color>();
// color_name -> "BLUE"
Remarks
magic_enum
does not pretend to be a silver bullet for reflection for enums, it was originally designed for small enum.Before use, read the limitations of functionality.
Integration
You should add the required file magic_enum.hpp.
If you are using vcpkg on your project for external dependencies, then you can use the magic-enum package.
If you are using Conan to manage your dependencies, merely add
magic_enum/x.y.z
to your conan's requires, wherex.y.z
is the release version you want to use.If you are using Build2 to build and manage your dependencies, add
depends: magic_enum ^x.y.z
to the manifest file wherex.y.z
is the release version you want to use. You can then import the target usingmagic_enum%lib{magic_enum}
.Alternatively, you can use something like CPM which is based on CMake's
Fetch_Content
module.
CPMAddPackage(
NAME magic_enum
GITHUB_REPOSITORY Neargye/magic_enum
GIT_TAG x.y.z # Where `x.y.z` is the release version you want to use.
)
- Bazel is also supported, simply add to your WORKSPACE file:
http_archive(
name = "magic_enum",
strip_prefix = "magic_enum-<commit>",
urls = ["https://github.com/Neargye/magic_enum/archive/<commit>.zip"],
)
To use bazel inside the repository it's possible to do:
bazel build //...
bazel test //...
bazel run //:example
(Note that you must use a supported compiler or specify it with export CC= <compiler>
.)
- If you are using Ros, you can include this package by adding
<depend>magic_enum</depend>
to your package.xml and include this package in your workspace. In your CMakeLists.txt add the following:
find_package(magic_enum CONFIG REQUIRED)
...
target_link_libraries(your_executable magic_enum::magic_enum)
Compiler compatibility
- Clang/LLVM >= 6
- MSVC++ >= 14.11 / Visual Studio >= 2017
- Xcode >= 10
- GCC >= 9
- MinGW >= 9
Licensed under the MIT License
Wiki Tutorials
Source Tutorials
Dependant Packages
Launch files
Messages
Services
Plugins
Recent questions tagged magic_enum at answers.ros.org
![]() |
magic_enum package from magic_enum repomagic_enum |
|
Package Summary
Tags | No category tags. |
Version | 0.8.2 |
License | MIT |
Build type | CMAKE |
Use | RECOMMENDED |
Repository Summary
Checkout URI | https://github.com/Neargye/magic_enum.git |
VCS Type | git |
VCS Version | master |
Last Updated | 2022-12-20 |
Dev Status | MAINTAINED |
CI status | No Continuous Integration |
Released | RELEASED |
Tags | No category tags. |
Contributing |
Help Wanted (0)
Good First Issues (0) Pull Requests to Review (0) |
Package Description
Additional Links
Maintainers
- Neargye
Authors
__ __ _ ______ _____
| \/ | (_) | ____| / ____|_ _
| \ / | __ _ __ _ _ ___ | |__ _ __ _ _ _ __ ___ | | _| |_ _| |_
| |\/| |/ _` |/ _` | |/ __| | __| | '_ \| | | | '_ ` _ \ | | |_ _|_ _|
| | | | (_| | (_| | | (__ | |____| | | | |_| | | | | | | | |____|_| |_|
|_| |_|\__,_|\__, |_|\___| |______|_| |_|\__,_|_| |_| |_| \_____|
__/ |
|___/
Magic Enum C++
Header-only C++17 library provides static reflection for enums, work with any enum type without any macro or boilerplate code.
-
enum_cast
obtains enum value from string or integer. -
enum_value
returns enum value at specified index. -
enum_values
obtains enum value sequence. -
enum_count
returns number of enum values. -
enum_integer
obtains integer value from enum value. -
enum_name
returns name from enum value. -
enum_names
obtains string enum name sequence. -
enum_entries
obtains pair (value enum, string enum name) sequence. -
enum_index
obtains index in enum value sequence from enum value. -
enum_contains
checks whether enum contains enumerator with such value. -
enum_type_name
returns name of enum type. -
enum_fuse
allows multidimensional switch/cases. -
enum_switch
allows runtime enum value transformation to constexpr context. -
enum_for_each
calls a function with all enum constexpr value. -
is_unscoped_enum
checks whether type is an Unscoped enumeration. -
is_scoped_enum
checks whether type is an Scoped enumeration. -
underlying_type
improved UB-free "SFINAE-friendly" underlying_type. -
ostream_operators
ostream operators for enums. -
bitwise_operators
bitwise operators for enums.
Documentation
Features
- C++17
- Header-only
- Dependency-free
- Compile-time
- Enum to string
- String to enum
- Iterating over enum
Examples
- Enum value to string
Color color = Color::RED;
auto color_name = magic_enum::enum_name(color);
// color_name -> "RED"
- String to enum value
std::string color_name{"GREEN"};
auto color = magic_enum::enum_cast<Color>(color_name);
if (color.has_value()) {
// color.value() -> Color::GREEN
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Integer to enum value
int color_integer = 2;
auto color = magic_enum::enum_cast<Color>(color_integer);
if (color.has_value()) {
// color.value() -> Color::BLUE
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Indexed access to enum value
std::size_t i = 0;
Color color = magic_enum::enum_value<Color>(i);
// color -> Color::RED
- Enum value sequence
constexpr auto colors = magic_enum::enum_values<Color>();
// colors -> {Color::RED, Color::BLUE, Color::GREEN}
// colors[0] -> Color::RED
- Number of enum elements
constexpr std::size_t color_count = magic_enum::enum_count<Color>();
// color_count -> 3
- Enum value to integer
Color color = Color::RED;
auto color_integer = magic_enum::enum_integer(color);
// color -> 1
- Enum names sequence
constexpr auto color_names = magic_enum::enum_names<Color>();
// color_names -> {"RED", "BLUE", "GREEN"}
// color_names[0] -> "RED"
- Enum entries sequence
constexpr auto color_entries = magic_enum::enum_entries<Color>();
// color_entries -> {{Color::RED, "RED"}, {Color::BLUE, "BLUE"}, {Color::GREEN, "GREEN"}}
// color_entries[0].first -> Color::RED
// color_entries[0].second -> "RED"
- Enum fusion for multi-level switch/case statements
switch (magic_enum::enum_fuse(color, direction).value()) {
case magic_enum::enum_fuse(Color::RED, Directions::Up).value(): // ...
case magic_enum::enum_fuse(Color::BLUE, Directions::Down).value(): // ...
// ...
}
- Enum switch runtime value as constexpr constant
Color color = Color::RED;
magic_enum::enum_switch([] (auto val) {
constexpr Color c_color = val;
// ...
}, color);
- Enum iterate for each enum as constexpr constant
magic_enum::enum_for_each<Color>([] (auto val) {
constexpr Color c_color = val;
// ...
});
- Ostream operator for enum
using namespace magic_enum::ostream_operators; // out-of-the-box ostream operators for enums.
Color color = Color::BLUE;
std::cout << color << std::endl; // "BLUE"
- Bitwise operator for enum
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::B & ~Flags::C;
- Checks whether type is an Unscoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_unscoped_enum<color>::value -> true
magic_enum::is_unscoped_enum<direction>::value -> false
magic_enum::is_unscoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_unscoped_enum_v<color> -> true
- Checks whether type is an Scoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_scoped_enum<color>::value -> false
magic_enum::is_scoped_enum<direction>::value -> true
magic_enum::is_scoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_scoped_enum_v<direction> -> true
- Static storage enum variable to string This version is much lighter on the compile times and is not restricted to the enum_range limitation.
constexpr Color color = Color::BLUE;
constexpr auto color_name = magic_enum::enum_name<color>();
// color_name -> "BLUE"
Remarks
magic_enum
does not pretend to be a silver bullet for reflection for enums, it was originally designed for small enum.Before use, read the limitations of functionality.
Integration
You should add the required file magic_enum.hpp.
If you are using vcpkg on your project for external dependencies, then you can use the magic-enum package.
If you are using Conan to manage your dependencies, merely add
magic_enum/x.y.z
to your conan's requires, wherex.y.z
is the release version you want to use.If you are using Build2 to build and manage your dependencies, add
depends: magic_enum ^x.y.z
to the manifest file wherex.y.z
is the release version you want to use. You can then import the target usingmagic_enum%lib{magic_enum}
.Alternatively, you can use something like CPM which is based on CMake's
Fetch_Content
module.
CPMAddPackage(
NAME magic_enum
GITHUB_REPOSITORY Neargye/magic_enum
GIT_TAG x.y.z # Where `x.y.z` is the release version you want to use.
)
- Bazel is also supported, simply add to your WORKSPACE file:
http_archive(
name = "magic_enum",
strip_prefix = "magic_enum-<commit>",
urls = ["https://github.com/Neargye/magic_enum/archive/<commit>.zip"],
)
To use bazel inside the repository it's possible to do:
bazel build //...
bazel test //...
bazel run //:example
(Note that you must use a supported compiler or specify it with export CC= <compiler>
.)
- If you are using Ros, you can include this package by adding
<depend>magic_enum</depend>
to your package.xml and include this package in your workspace. In your CMakeLists.txt add the following:
find_package(magic_enum CONFIG REQUIRED)
...
target_link_libraries(your_executable magic_enum::magic_enum)
Compiler compatibility
- Clang/LLVM >= 6
- MSVC++ >= 14.11 / Visual Studio >= 2017
- Xcode >= 10
- GCC >= 9
- MinGW >= 9
Licensed under the MIT License
Wiki Tutorials
Source Tutorials
Dependant Packages
Launch files
Messages
Services
Plugins
Recent questions tagged magic_enum at answers.ros.org
![]() |
magic_enum package from magic_enum repomagic_enum |
|
Package Summary
Tags | No category tags. |
Version | 0.8.2 |
License | MIT |
Build type | CMAKE |
Use | RECOMMENDED |
Repository Summary
Checkout URI | https://github.com/Neargye/magic_enum.git |
VCS Type | git |
VCS Version | master |
Last Updated | 2022-12-20 |
Dev Status | MAINTAINED |
CI status | No Continuous Integration |
Released | RELEASED |
Tags | No category tags. |
Contributing |
Help Wanted (0)
Good First Issues (0) Pull Requests to Review (0) |
Package Description
Additional Links
Maintainers
- Neargye
Authors
__ __ _ ______ _____
| \/ | (_) | ____| / ____|_ _
| \ / | __ _ __ _ _ ___ | |__ _ __ _ _ _ __ ___ | | _| |_ _| |_
| |\/| |/ _` |/ _` | |/ __| | __| | '_ \| | | | '_ ` _ \ | | |_ _|_ _|
| | | | (_| | (_| | | (__ | |____| | | | |_| | | | | | | | |____|_| |_|
|_| |_|\__,_|\__, |_|\___| |______|_| |_|\__,_|_| |_| |_| \_____|
__/ |
|___/
Magic Enum C++
Header-only C++17 library provides static reflection for enums, work with any enum type without any macro or boilerplate code.
-
enum_cast
obtains enum value from string or integer. -
enum_value
returns enum value at specified index. -
enum_values
obtains enum value sequence. -
enum_count
returns number of enum values. -
enum_integer
obtains integer value from enum value. -
enum_name
returns name from enum value. -
enum_names
obtains string enum name sequence. -
enum_entries
obtains pair (value enum, string enum name) sequence. -
enum_index
obtains index in enum value sequence from enum value. -
enum_contains
checks whether enum contains enumerator with such value. -
enum_type_name
returns name of enum type. -
enum_fuse
allows multidimensional switch/cases. -
enum_switch
allows runtime enum value transformation to constexpr context. -
enum_for_each
calls a function with all enum constexpr value. -
is_unscoped_enum
checks whether type is an Unscoped enumeration. -
is_scoped_enum
checks whether type is an Scoped enumeration. -
underlying_type
improved UB-free "SFINAE-friendly" underlying_type. -
ostream_operators
ostream operators for enums. -
bitwise_operators
bitwise operators for enums.
Documentation
Features
- C++17
- Header-only
- Dependency-free
- Compile-time
- Enum to string
- String to enum
- Iterating over enum
Examples
- Enum value to string
Color color = Color::RED;
auto color_name = magic_enum::enum_name(color);
// color_name -> "RED"
- String to enum value
std::string color_name{"GREEN"};
auto color = magic_enum::enum_cast<Color>(color_name);
if (color.has_value()) {
// color.value() -> Color::GREEN
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Integer to enum value
int color_integer = 2;
auto color = magic_enum::enum_cast<Color>(color_integer);
if (color.has_value()) {
// color.value() -> Color::BLUE
}
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);
- Indexed access to enum value
std::size_t i = 0;
Color color = magic_enum::enum_value<Color>(i);
// color -> Color::RED
- Enum value sequence
constexpr auto colors = magic_enum::enum_values<Color>();
// colors -> {Color::RED, Color::BLUE, Color::GREEN}
// colors[0] -> Color::RED
- Number of enum elements
constexpr std::size_t color_count = magic_enum::enum_count<Color>();
// color_count -> 3
- Enum value to integer
Color color = Color::RED;
auto color_integer = magic_enum::enum_integer(color);
// color -> 1
- Enum names sequence
constexpr auto color_names = magic_enum::enum_names<Color>();
// color_names -> {"RED", "BLUE", "GREEN"}
// color_names[0] -> "RED"
- Enum entries sequence
constexpr auto color_entries = magic_enum::enum_entries<Color>();
// color_entries -> {{Color::RED, "RED"}, {Color::BLUE, "BLUE"}, {Color::GREEN, "GREEN"}}
// color_entries[0].first -> Color::RED
// color_entries[0].second -> "RED"
- Enum fusion for multi-level switch/case statements
switch (magic_enum::enum_fuse(color, direction).value()) {
case magic_enum::enum_fuse(Color::RED, Directions::Up).value(): // ...
case magic_enum::enum_fuse(Color::BLUE, Directions::Down).value(): // ...
// ...
}
- Enum switch runtime value as constexpr constant
Color color = Color::RED;
magic_enum::enum_switch([] (auto val) {
constexpr Color c_color = val;
// ...
}, color);
- Enum iterate for each enum as constexpr constant
magic_enum::enum_for_each<Color>([] (auto val) {
constexpr Color c_color = val;
// ...
});
- Ostream operator for enum
using namespace magic_enum::ostream_operators; // out-of-the-box ostream operators for enums.
Color color = Color::BLUE;
std::cout << color << std::endl; // "BLUE"
- Bitwise operator for enum
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::B & ~Flags::C;
- Checks whether type is an Unscoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_unscoped_enum<color>::value -> true
magic_enum::is_unscoped_enum<direction>::value -> false
magic_enum::is_unscoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_unscoped_enum_v<color> -> true
- Checks whether type is an Scoped enumeration.
enum color { red, green, blue };
enum class direction { left, right };
magic_enum::is_scoped_enum<color>::value -> false
magic_enum::is_scoped_enum<direction>::value -> true
magic_enum::is_scoped_enum<int>::value -> false
// Helper variable template.
magic_enum::is_scoped_enum_v<direction> -> true
- Static storage enum variable to string This version is much lighter on the compile times and is not restricted to the enum_range limitation.
constexpr Color color = Color::BLUE;
constexpr auto color_name = magic_enum::enum_name<color>();
// color_name -> "BLUE"
Remarks
magic_enum
does not pretend to be a silver bullet for reflection for enums, it was originally designed for small enum.Before use, read the limitations of functionality.
Integration
You should add the required file magic_enum.hpp.
If you are using vcpkg on your project for external dependencies, then you can use the magic-enum package.
If you are using Conan to manage your dependencies, merely add
magic_enum/x.y.z
to your conan's requires, wherex.y.z
is the release version you want to use.If you are using Build2 to build and manage your dependencies, add
depends: magic_enum ^x.y.z
to the manifest file wherex.y.z
is the release version you want to use. You can then import the target usingmagic_enum%lib{magic_enum}
.Alternatively, you can use something like CPM which is based on CMake's
Fetch_Content
module.
CPMAddPackage(
NAME magic_enum
GITHUB_REPOSITORY Neargye/magic_enum
GIT_TAG x.y.z # Where `x.y.z` is the release version you want to use.
)
- Bazel is also supported, simply add to your WORKSPACE file:
http_archive(
name = "magic_enum",
strip_prefix = "magic_enum-<commit>",
urls = ["https://github.com/Neargye/magic_enum/archive/<commit>.zip"],
)
To use bazel inside the repository it's possible to do:
bazel build //...
bazel test //...
bazel run //:example
(Note that you must use a supported compiler or specify it with export CC= <compiler>
.)
- If you are using Ros, you can include this package by adding
<depend>magic_enum</depend>
to your package.xml and include this package in your workspace. In your CMakeLists.txt add the following:
find_package(magic_enum CONFIG REQUIRED)
...
target_link_libraries(your_executable magic_enum::magic_enum)
Compiler compatibility
- Clang/LLVM >= 6
- MSVC++ >= 14.11 / Visual Studio >= 2017
- Xcode >= 10
- GCC >= 9
- MinGW >= 9