Reference

enum_cast returns enum value from string or integer.
enum_value returns enum value at specified index.
enum_values returns enum value sequence.
enum_count returns number of enum values.
enum_integer returns integer value from enum value.
enum_name returns name from enum value.
enum_names returns string enum name sequence.
enum_entries returns pair (value enum, string enum name) sequence.
customize::enum_range
enum_index returns index in enum value sequence from enum value.
enum_contains checks whether enum contains enumerator with such value.
enum_reflected returns true if the enum value is in the range of values that can be reflected.
enum_type_name returns type name of enum.
enum_fuse returns a bijective mix of enum values.
enum_switch allows runtime enum value transformation to constexpr context.
enum_for_each calls a function with all enum constexpr value.
enum_flags_* functions for flags.
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.
istream_operators istream operators for enums.
bitwise_operators bitwise operators for enums.
containers::array array container for enums.
containers::bitset bitset container for enums.
containers::set set container for enums.

Synopsis

Before use, read the limitations of functionality.
To check is magic_enum supported compiler use macro MAGIC_ENUM_SUPPORTED or constexpr constant magic_enum::is_magic_enum_supported. If magic_enum used on unsupported compiler, occurs the compilation error. To suppress error define macro MAGIC_ENUM_NO_CHECK_SUPPORT.
To add custom enum or type names see the example.

To change the type of strings or optional, use special macros:

cpp

#include <my_lib/string.hpp>
#include <my_lib/string_view.hpp>
#define MAGIC_ENUM_USING_ALIAS_STRING using string = my_lib::String;
#define MAGIC_ENUM_USING_ALIAS_STRING_VIEW using string_view = my_lib::StringView;
#define MAGIC_ENUM_USING_ALIAS_OPTIONAL template <typename T> using optional = my_lib::Optional<T>;
#include <magic_enum/magic_enum.hpp>

Optionally define MAGIC_ENUM_CONFIG_FILE i.e., in your build system, with path to header file with defined macros or constants, for example:

cpp

#define MAGIC_ENUM_CONFIG_FILE "my_magic_enum_cfg.hpp"

my_magic_enum_cfg.hpp:

cpp

#include <my_lib/string.hpp>
#include <my_lib/string_view.hpp>
#define MAGIC_ENUM_USING_ALIAS_STRING using string = my_lib::String;
#define MAGIC_ENUM_USING_ALIAS_STRING_VIEW using string_view = my_lib::StringView;
#define MAGIC_ENUM_USING_ALIAS_OPTIONAL template <typename T> using optional = my_lib::Optional<T>;
#define MAGIC_ENUM_RANGE_MIN 0
#define MAGIC_ENUM_RANGE_MAX 255

`enum_cast`

cpp

template <typename E>
constexpr optional<E> enum_cast(underlying_type_t<E> value) noexcept;

template <typename E>
constexpr optional<E> enum_cast(string_view value) noexcept;

template <typename E, typename BinaryPredicate>
constexpr optional<E> enum_cast(string_view value, BinaryPredicate p);

Defined in header <magic_enum/magic_enum.hpp>
Returns enum value from string or integer.
Returns optional<E>, using has_value() to check contains enum value and value() to get the enum value.
If argument does not enum value, returns empty optional.

Examples

String to enum value.

cpp

string color_name{"GREEN"};
auto color = magic_enum::enum_cast<Color>(color_name);
if (color.has_value()) {
    // color.value() -> Color::GREEN
}

// case insensitive enum_cast
auto color = magic_enum::enum_cast<Color>(value, magic_enum::case_insensitive);

// enum_cast with BinaryPredicate
auto color = magic_enum::enum_cast<Color>(value, [](char lhs, char rhs) { return std::tolower(lhs) == std::tolower(rhs); });

// enum_cast with default
auto color_or_default = magic_enum::enum_cast<Color>(value).value_or(Color::NONE);

Integer to enum value.

cpp

int color_integer = 0;
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);

`enum_value`

cpp

template <typename E>
constexpr E enum_value(size_t index) noexcept;

template <typename E, size_t I>
constexpr E enum_value() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns enum value at specified index.
- enum_value(value) no bounds checking is performed: the behavior is undefined if index >= number of enum values.
- enum_value<value>() check if I >= number of enum values, occurs the compilation error magic_enum::enum_value out of range.

Examples

cpp

int i = 1;
Color color = magic_enum::enum_value<Color>(i);
// color -> Color::BLUE

cpp

Color color = magic_enum::enum_value<Color, 1>();
// color -> Color::BLUE

`enum_values`

cpp

template <typename E>
constexpr array<E, N> enum_values() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns array<E, N> with all enum values where N = number of enum values, sorted by enum value.

Examples

cpp

constexpr auto colors = magic_enum::enum_values<Color>();
// colors -> {Color::RED, Color::BLUE, Color::GREEN}
// colors[0] -> Color::RED

`enum_count`

cpp

template <typename E>
constexpr size_t enum_count() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns number of enum values.

Examples

cpp

constexpr auto color_count = magic_enum::enum_count<Color>();
// color_count -> 3

`enum_integer`

cpp

template <typename E>
constexpr underlying_type_t<E> enum_integer(E value) noexcept;

template <typename E>
constexpr underlying_type_t<E> enum_underlying(E value) noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns integer value from enum value.

Examples

cpp

Color color = Color::RED;
auto color_integer = magic_enum::enum_integer(color);
// color -> 2

`enum_name`

cpp

template <typename E>
constexpr string_view enum_name(E value) noexcept;

template <auto V>
constexpr string_view enum_name() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns name from enum value as string_view with null-terminated string.
- If enum value does not have name or out of range, enum_name(value) returns empty string.
- If enum value does not have name, enum_name<value>() occurs the compilation error magic_enum::enum_name enum value does not have a name.
enum_name<value>() is much lighter on the compile times and is not restricted to the enum_range limitation.

Examples

cpp

Color color = Color::RED;
auto color_name = magic_enum::enum_name(color);
// color_name -> "RED"

cpp

constexpr Color color = Color::BLUE;
constexpr auto color_name = magic_enum::enum_name<color>();
// color_name -> "BLUE"

`enum_names`

cpp

template <typename E>
constexpr array<string_view, N> enum_names() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns array<string_view, N> with all names where N = number of enum values, sorted by enum value.

Examples

cpp

constexpr auto color_names = magic_enum::enum_names<Color>();
// color_names -> {"RED", "BLUE", "GREEN"}
// color_names[0] -> "RED"

`enum_entries`

cpp

template <typename E>
constexpr array<pair<E, string_view>, N> enum_entries() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns array<pair<E, string_view>, N> with all pairs (value, name) where N = number of enum values, sorted by enum value.

Examples

cpp

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"

`customize::enum_range`

cpp

namespace customize {
template <typename E, typename = void>
struct enum_range {
  constexpr static std::size_t prefix_length = 0;
  constexpr static bool is_flags = false;
  constexpr static int min = MAGIC_ENUM_RANGE_MIN;
  constexpr static int max = MAGIC_ENUM_RANGE_MAX;
};
}

Defined in header <magic_enum/magic_enum.hpp>
A customization point for controlling magic_enum defaults
It has a defaulted second void typename template parameter for SFINAE.
is_flags tells magic_enum whether this enum should be considered to be a bitflag enum. It is not required to be defined if not defined it will be assumed to be false
prefix_length tells magic_enum how many characters to remove from the start of the names for all string functions. It is not required to be defined if not defined it will be assumed to be 0
min and max are not required to be defined if is_flags is defined because they are ignored for enum flags. otherwise they are required.

Examples

Controlling prefix length

cpp

enum CStyleAnimals {
  CStyleAnimals_Giraffe,
  CStyleAnimals_Elephant,
  CStyleAnimals_Lion,
};

template<>
struct magic_enum::customize::enum_range<CStyleAnimals> {
    // sizeof counts null terminator subtract 1 to get length
    constexpr static auto prefix_length = sizeof("CStyleAnimals_")-1;
    constexpr static int min = CStyleAnimals_Giraffe; // required
    constexpr static int max = CStyleAnimals_Lion;    // required
};

CStyleAnimals animal = CStyleAnimals_Giraffe;
auto animal_name = magic_enum::enum_name(animal);
// animal_name => "Giraffe"
auto animal_from_string = magic_enum::enum_cast<CStyleAnimals>(animal_name);
// animal_from_string.value() == CStyleAnimals_Giraffe

`enum_index`

cpp

template <typename E>
constexpr optional<size_t> enum_index(E value) noexcept;

template <auto V>
constexpr size_t enum_index() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns index in enum values from enum value.
- enum_index(value) returns optional<size_t> with index.
- enum_index<value>() returns index. If enum value does not have a index, occurs the compilation error magic_enum::enum_index enum value does not have a index.

Examples

cpp

constexpr auto color_index = magic_enum::enum_index(Color::BLUE);
// color_index.value() -> 1
// color_index.has_value() -> true

cpp

constexpr auto color_index = magic_enum::enum_index<Color::BLUE>();
// color_index -> 1

`enum_contains`

cpp

template <typename E>
constexpr bool enum_contains(E value) noexcept;

template <typename E>
constexpr bool enum_contains(underlying_type_t<E> value) noexcept;

template <typename E>
constexpr bool enum_contains(string_view value) noexcept;

template <typename E, typename BinaryPredicate>
constexpr bool enum_contains(string_view value, BinaryPredicate p);

Defined in header <magic_enum/magic_enum.hpp>
Checks whether enum contains enumerator with such value.
Returns true is enum contains value, otherwise false.

Examples

cpp

magic_enum::enum_contains(Color::GREEN); // -> true
magic_enum::enum_contains<Color>(2); // -> true
magic_enum::enum_contains<Color>(123); // -> false
magic_enum::enum_contains<Color>("GREEN"); // -> true
magic_enum::enum_contains<Color>("fda"); // -> false

`enum_reflected`

cpp

template <typename E>
constexpr bool enum_reflected(E value) noexcept;

template <typename E>
constexpr bool enum_reflected(underlying_type_t<E> value) noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns true if the enum value is in the range of values that can be reflected.

`enum_type_name`

cpp

template <typename E>
constexpr string_view enum_type_name() noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Returns type name of enum as string_view null-terminated string.

Examples

cpp

Color color = Color::RED;
auto type_name = magic_enum::enum_type_name<decltype(color)>();
// type_name -> "Color"

`enum_fuse`

cpp

template <typename... Es>
constexpr optional<enum_fuse_t> enum_fuse(Es... values) noexcept;

Defined in header <magic_enum/magic_enum_fuse.hpp>
Returns a typesafe bijective mix of several enum values. This can be used to emulate 2D switch/case statements.
Return type is optional<enum_fuse_t> where enum_fuse_t is an incomplete enum, it is unique for any given combination of Es....
Switch/case statement over an incomplete enum is a Visual Studio warning C4064
- You have to silent (/wd4064) or ignore it.
- Alternatively, define MAGIC_ENUM_NO_TYPESAFE_ENUM_FUSE to disable type-safety (enum_fuse_t equals uintmax_t).

Examples

cpp

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(): // ...
  case magic_enum::enum_fuse(Directions::BLUE, Color::Down).value(): // Compilation error
// ...
}

`enum_switch`

cpp

template <typename Result = void, typename E, typename Lambda>
constexpr Result enum_switch(Lambda&& lambda, E value);

template <typename Result, typename E, typename Lambda>
constexpr Result enum_switch(Lambda&& lambda, E value, Result&& result);

Defined in header <magic_enum/magic_enum_switch.hpp>

Examples

cpp

Color color = Color::RED;

magic_enum::enum_switch([] (auto val) {
  constexpr Color c_color = val;
  // ...
}, color);

`enum_for_each`

cpp

template <typename E, typename Lambda>
constexpr auto enum_for_each(Lambda&& lambda);

Defined in header <magic_enum/magic_enum_utility.hpp>

Examples

cpp

underlying_type_t<Color> sum{};
enum_for_each<Color>([&sum](auto val) {
  constexpr underlying_type_t<Color> v = enum_integer(val());
  sum += v;
});

`enum_flags`

cpp

template <typename E>
string enum_flags_name(E value, char_type sep = '|');

template <typename E>
constexpr optional<E> enum_flags_cast(underlying_type_t<E> value) noexcept;

template <typename E, typename BinaryPredicate>
constexpr optional<E> enum_flags_cast(string_view value, char_type sep = '|', BinaryPredicate p);

template <typename E>
constexpr bool enum_flags_contains(E value) noexcept;

template <typename E>
constexpr bool enum_flags_contains(underlying_type_t<E> value) noexcept;

template <typename E, typename BinaryPredicate>
constexpr bool enum_flags_contains(string_view value, char_type sep = '|', BinaryPredicate p);

template <typename E>
constexpr bool enum_flags_test(E flags, E flag) noexcept;

template <typename E>
constexpr bool enum_flags_test_any(E lhs, E rhs) noexcept;

Defined in header <magic_enum/magic_enum_flags.hpp>
enum_flags_name - Returns name from enum-flags value with custom separator (default '|').
enum_flags_cast - Returns enum-flags value from integer or string.
enum_flags_contains - Checks whether enum-flags contains value with such value or name.
enum_flags_test - Checks whether flags set contains flag. Returns false if flag equals 0.
enum_flags_test_any - Checks whether lhs flags set and rhs flags set have common flags. Returns false if either set equals 0.
For enum-flags add is_flags to specialization enum_range for necessary enum type. Specialization of enum_range must be injected in namespace magic_enum::customize.
cpp
```
enum class Directions { Up = 1 << 1, Down = 1 << 2, Right = 1 << 3, Left = 1 << 4 };
template <>
struct magic_enum::customize::enum_range<Directions> {
 static constexpr bool is_flags = true;
};
```
- MAGIC_ENUM_RANGE_MAX/MAGIC_ENUM_RANGE_MIN does not affect the maximum amount of flags.
- If enum is declared as flags, then it will not reflect the value of zero and is logically AND.

Examples

cpp

enum Directions : std::uint64_t {
  Left = 1,
  Down = 2,
  Up = 4,
  Right = 8,
  LeftAndDown = 3
};
template <>
struct magic_enum::customize::enum_range<Directions> {
  static constexpr bool is_flags = true;
};

magic_enum::enum_flags_name(Directions::Up | Directions::Right); // -> "Directions::Up|Directions::Right"
magic_enum::enum_flags_name(Directions::LeftAndDown); // -> "Directions::Left|Directions::Down"
magic_enum::enum_flags_name(Directions::Up | Directions::Right, ','); // -> "Directions::Up,Directions::Right"

magic_enum::enum_flags_contains(Directions::Up | Directions::Right); // -> true
magic_enum::enum_flags_contains(Directions::LeftAndDown); // -> false

magic_enum::enum_flags_cast(3); // -> "Directions::Left|Directions::Down"
magic_enum::enum_flags_cast<Directions>("Directions::Left|Directions::Down"); // -> Directions::Left|Directions::Down
magic_enum::enum_flags_cast<Directions>("Left,Down", ','); // -> Directions::Left|Directions::Down

magic_enum::enum_flags_test(Left|Down, Down); // -> true
magic_enum::enum_flags_test(Left|Down, Right); // -> false

magic_enum::enum_flags_test_any(Left|Down|Right, Down|Right); // -> true

Or, for enum types that are deeply nested in classes and/or namespaces, declare a function called magic_enum_define_range_adl(my_enum_type) in the same namespace as my_enum_type, which magic_enum will find by ADL (because the function is in the same class/namespace as my_enum_type), and whose return type is a magic_enum::customize::adl_info.

cpp

namespace Deeply::Nested::Namespace {
  enum class my_enum_type { my_enum_value1,my_enum_value2 };

  // - magic_enum will find this function by ADL
  // - uses builder pattern
  // - use auto to not have to name the type yourself
  auto magic_enum_define_range_adl(my_enum_type)
  {
    return magic_enum::customize::adl_info()
    .minmax<10,10>() // the min max search range
    .flag<true>() // whether it is a flag enum
    .prefix<sizeof("my_enum_")-1>(); // how many characters to trim from the start of each enum entry.
  }
}

`is_unscoped_enum`

cpp

template <typename T>
struct is_unscoped_enum;

template <typename T>
inline constexpr bool is_unscoped_enum_v = is_unscoped_enum<T>::value;

Defined in header <magic_enum/magic_enum.hpp>
Checks whether type is an Unscoped enumeration.
Provides the member constant value which is equal to true, if T is an Unscoped enumeration type. Otherwise, value is equal to false.

Examples

cpp

magic_enum::is_unscoped_enum<color>::value -> true
magic_enum::is_unscoped_enum<Direction>::value -> false

// Helper variable template.
magic_enum::is_unscoped_enum_v<color> -> true

`is_scoped_enum`

cpp

template <typename T>
struct is_scoped_enum;

template <typename T>
inline constexpr bool is_scoped_enum_v = is_scoped_enum<T>::value;

Defined in header <magic_enum/magic_enum.hpp>
Checks whether type is an Scoped enumeration.
Provides the member constant value which is equal to true, if T is an Scoped enumeration type. Otherwise, value is equal to false.

Examples

cpp

magic_enum::is_scoped_enum<color>::value -> false
magic_enum::is_scoped_enum<Direction>::value -> true

// Helper variable template.
magic_enum::is_scoped_enum_v<Direction> -> true

`underlying_type`

cpp

template <typename T>
struct underlying_type;

template <typename T>
using underlying_type_t = typename underlying_type<T>::type;

Defined in header <magic_enum/magic_enum.hpp>
Improved UB-free "SFINAE-friendly" underlying_type.
If T is a complete enumeration type, provides a member typedef type that names the underlying type of T. Otherwise, if T is not an enumeration type, there is no member type. Otherwise (T is an incomplete enumeration type), the program is ill-formed.

Examples

cpp

magic_enum::underlying_type<color>::type -> int

// Helper types.
magic_enum::underlying_type_t<Direction> -> int

`ostream_operators`

cpp

template <typename Char, typename Traits, typename E>
basic_ostream<Char, Traits>& operator<<(basic_ostream<Char, Traits>& os, E value);

template <typename Char, typename Traits, typename E>
basic_ostream<Char, Traits>& operator<<(basic_ostream<Char, Traits>& os, optional<E> value);

Defined in header <magic_enum/magic_enum_iostream.hpp>
Out-of-the-box ostream operators for all enums.

Examples

cpp

using magic_enum::iostream_operators::operator<<; // out-of-the-box ostream operators for enums.
Color color = Color::BLUE;
std::cout << color << std::endl; // "BLUE"

`istream_operators`

cpp

template <typename Char, typename Traits, typename E>
basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is, E& value);

Defined in header <magic_enum/magic_enum_iostream.hpp>
Out-of-the-box istream operators for all enums.

Examples

cpp

using magic_enum::iostream_operators::operator>>; // out-of-the-box istream operators for enums.
Color color;
std::cin >> color;

`bitwise_operators`

cpp

template <typename E>
constexpr E operator~(E rhs) noexcept;

template <typename E>
constexpr E operator|(E lhs, E rhs) noexcept;

template <typename E>
constexpr E operator&(E lhs, E rhs) noexcept;

template <typename E>
constexpr E operator^(E lhs, E rhs) noexcept;

template <typename E>
constexpr E& operator|=(E& lhs, E rhs) noexcept;

template <typename E>
constexpr E& operator&=(E& lhs, E rhs) noexcept;

template <typename E>
constexpr E& operator^=(E& lhs, E rhs) noexcept;

Defined in header <magic_enum/magic_enum.hpp>
Out-of-the-box bitwise operators for all enums.

Examples

cpp

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;

`containers::array`

cpp

template <typename E, typename V, typename Index = default_indexing<E>>
struct array {

  constexpr reference at(E pos);

  constexpr const_reference at(E pos) const;

  constexpr reference operator[](E pos) noexcept;

  constexpr const_reference operator[](E pos) const noexcept;

  constexpr reference front() noexcept;

  constexpr const_reference front() const noexcept;

  constexpr reference back() noexcept;

  constexpr const_reference back() const noexcept;

  constexpr pointer data() noexcept;

  constexpr const_pointer data() const noexcept;

  constexpr iterator begin() noexcept;

  constexpr const_iterator begin() const noexcept;

  constexpr const_iterator cbegin() const noexcept;

  constexpr iterator end() noexcept;

  constexpr const_iterator end() const noexcept;

  constexpr const_iterator cend() const noexcept;

  constexpr iterator rbegin() noexcept;

  constexpr const_iterator rbegin() const noexcept;

  constexpr const_iterator crbegin() const noexcept;

  constexpr iterator rend() noexcept;

  constexpr const_iterator rend() const noexcept;

  constexpr const_iterator crend() const noexcept;

  constexpr bool empty() const noexcept;

  constexpr size_type size() const noexcept;

  constexpr size_type max_size() const noexcept;

  constexpr void fill(const V& value);

  constexpr void swap(array& other) noexcept(std::is_nothrow_swappable_v<V>);

  friend constexpr bool operator==(const array& a1, const array& a2);

  friend constexpr bool operator!=(const array& a1, const array& a2);

  friend constexpr bool operator<(const array& a1, const array& a2);

  friend constexpr bool operator<=(const array& a1, const array& a2);

  friend constexpr bool operator>(const array& a1, const array& a2);

  friend constexpr bool operator>=(const array& a1, const array& a2);
}

Defined in header <magic_enum/magic_enum_containers.hpp>
STL like array for all enums.

Examples

cpp

constexpr magic_enum::containers::array<Color, RGB> color_rgb_array {{{{255, 0, 0}, {0, 255, 0}, {0, 0, 255}}}};

cpp

magic_enum::containers::array<Color, RGB> color_rgb_array {};
color_rgb_array[Color::RED] = {255, 0, 0};
color_rgb_array[Color::GREEN] = {0, 255, 0};
color_rgb_array[Color::BLUE] = {0, 0, 255};
magic_enum::containers::get<Color::BLUE>(color_rgb_array) // -> RGB{0, 0, 255}

`containers::bitset`

cpp

template <typename E, typename Index = default_indexing<E>>
class bitset {

  constexpr explicit bitset(detail::raw_access_t = raw_access) noexcept;

  constexpr explicit bitset(detail::raw_access_t, unsigned long long val);

  constexpr explicit bitset(detail::raw_access_t,
                            string_view sv,
                            string_view::size_type pos = 0,
                            string_view::size_type n = string_view::npos,
                            char_type zero = '0',
                            char_type one = '1');

  constexpr explicit bitset(detail::raw_access_t,
                            const char_type* str,
                            std::size_t n = ~std::size_t{},
                            char_type zero = '0',
                            char_type one = '1');

  constexpr bitset(std::initializer_list<E> starters);

  constexpr explicit bitset(E starter);

  template <typename Cmp = std::equal_to<>>
  constexpr explicit bitset(string_view sv,
                            Cmp&& cmp = {},
                            char_type sep = '|');

  friend constexpr bool operator==(const bitset& lhs, const bitset& rhs) noexcept;

  friend constexpr bool operator!=(const bitset& lhs, const bitset& rhs) noexcept;

  constexpr bool operator[](E pos) const noexcept;

  constexpr reference operator[](E pos) noexcept;

  constexpr bool test(E pos) const;

  constexpr bool all() const noexcept;

  constexpr bool any() const noexcept;

  constexpr bool none() const noexcept;

  constexpr std::size_t count() const noexcept;

  constexpr std::size_t size() const noexcept;

  constexpr std::size_t max_size() const noexcept;

  constexpr bitset& operator&= (const bitset& other) noexcept;

  constexpr bitset& operator|= (const bitset& other) noexcept;

  constexpr bitset& operator^= (const bitset& other) noexcept;

  constexpr bitset operator~() const noexcept;

  constexpr bitset& set() noexcept;

  constexpr bitset& set(E pos, bool value = true);

  constexpr bitset& reset() noexcept;

  constexpr bitset& reset(E pos);

  constexpr bitset& flip() noexcept;

  friend constexpr bitset operator&(const bitset& lhs, const bitset& rhs) noexcept;

  friend constexpr bitset operator|(const bitset& lhs, const bitset& rhs) noexcept;

  friend constexpr bitset operator^(const bitset& lhs, const bitset& rhs) noexcept;

  constexpr explicit operator E() const;

  string to_string(char_type sep = '|') const;

  string to_string(detail::raw_access_t,
                   char_type zero = '0',
                   char_type one = '1') const;

  constexpr unsigned long long to_ullong(detail::raw_access_t raw) const;

  constexpr unsigned long long to_ulong(detail::raw_access_t raw) const;

  friend std::ostream& operator<<(std::ostream& o, const bitset& bs);

  friend std::istream& operator>>(std::istream& i, bitset& bs);
}

Defined in header <magic_enum/magic_enum_containers.hpp>
STL like bitset for all enums.

Examples

cpp

constexpr magic_enum::containers::bitset<Color> color_bitset_red_green {Color::RED|Color::GREEN};
bool all = color_bitset_red_green.all();
// all -> false
// Color::BLUE is missing
bool test = color_bitset_red_green.test(Color::RED);
// test -> true

cpp

auto color_bitset = magic_enum::containers::bitset<Color>();
color_bitset.set(Color::GREEN);
color_bitset.set(Color::BLUE);
std::string to_string = color_bitset.to_string();
// to_string -> "GREEN|BLUE"

`containers::set`

cpp

template <typename E, typename CExprLess = std::less<E>>
class set {

  constexpr set() noexcept = default;

  template <typename InputIt>
  constexpr set(InputIt first, InputIt last);

  constexpr set(std::initializer_list<E> ilist);

  constexpr explicit set(E starter);

  constexpr set(const set&) noexcept = default;

  constexpr set(set&&) noexcept = default;

  constexpr set& operator=(const set&) noexcept = default;

  constexpr set& operator=(set&&) noexcept = default;

  constexpr set& operator=(std::initializer_list<E> ilist);

  constexpr const_iterator begin() const noexcept;

  constexpr const_iterator end() const noexcept;

  constexpr const_iterator cbegin() const noexcept;

  constexpr const_iterator cend() const noexcept;

  constexpr const_reverse_iterator rbegin() const noexcept;

  constexpr const_reverse_iterator rend() const noexcept;

  constexpr const_reverse_iterator crbegin() const noexcept;

  constexpr const_reverse_iterator crend() const noexcept;

  constexpr bool empty() const noexcept;

  constexpr size_type size() const noexcept;

  constexpr size_type max_size() const noexcept;

  constexpr void clear() noexcept;

  constexpr std::pair<iterator,bool> insert(const value_type& value) noexcept;

  constexpr std::pair<iterator,bool> insert(value_type&& value) noexcept;

  constexpr iterator insert(const_iterator, const value_type& value) noexcept;

  constexpr iterator insert(const_iterator hint, value_type&& value) noexcept;

  template <typename InputIt>
  constexpr void insert(InputIt first, InputIt last) noexcept;

  constexpr void insert(std::initializer_list<value_type> ilist) noexcept;

  template <typename... Args>
  constexpr std::pair<iterator, bool> emplace(Args&&... args) noexcept;

  template <typename... Args>
  constexpr iterator emplace_hint(const_iterator, Args&&... args) noexcept;

  constexpr iterator erase(const_iterator pos) noexcept;

  constexpr iterator erase(const_iterator first, const_iterator last) noexcept;

  constexpr size_type erase(const key_type& key) noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, size_type> erase(K&& x) noexcept;

  void swap(set& other) noexcept;

  constexpr size_type count(const key_type& key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, size_type> count(const K& x) const;

  constexpr const_iterator find(const key_type & key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, const_iterator> find(const K& x) const;

  constexpr bool contains(const key_type& key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, bool> contains(const K& x) const noexcept;

  constexpr std::pair<const_iterator,const_iterator> equal_range(const key_type& key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, std::pair<const_iterator,const_iterator>> equal_range(const K& x) const noexcept;

  constexpr const_iterator lower_bound(const key_type& key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, const_iterator> lower_bound(const K& x) const noexcept;

  constexpr const_iterator upper_bound(const key_type& key) const noexcept;

  template <typename K, typename KC = key_compare>
  constexpr std::enable_if_t<detail::is_transparent_v<KC>, const_iterator> upper_bound(const K& x) const noexcept;

  constexpr key_compare key_comp() const;

  constexpr value_compare value_comp() const;

  constexpr friend bool operator==(const set& lhs, const set& rhs) noexcept;

  constexpr friend bool operator!=(const set& lhs, const set& rhs) noexcept;

  constexpr friend bool operator<(const set& lhs, const set& rhs) noexcept;

  constexpr friend bool operator<=(const set& lhs, const set& rhs) noexcept;

  constexpr friend bool operator>(const set& lhs, const set& rhs) noexcept;

  constexpr friend bool operator>=(const set& lhs, const set& rhs) noexcept;

  template <typename Pred>
  size_type erase_if(Pred pred);
}

Defined in header <magic_enum/magic_enum_containers.hpp>
STL like set for all enums.

Examples

cpp

constexpr magic_enum::containers::set color_set_filled = {Color::RED, Color::GREEN, Color::BLUE};

cpp

auto color_set = magic_enum::containers::set<Color>();
bool empty = color_set.empty();
// empty -> true
color_set.insert(Color::GREEN);
color_set.insert(Color::BLUE);
color_set.insert(Color::RED);
std::size_t size = color_set.size();
// size -> 3