Nameof

If argument does not have name, occurs the compilation error "Expression does not have a name.".

Nameof Type

To check is nameof_type supported compiler use macro NAMEOF_TYPE_SUPPORTED or constexpr constant nameof::is_nameof_type_supported.
This library uses a compiler-specific hack (based on __PRETTY_FUNCTION__ / __FUNCSIG__), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 7.
Nameof type returns compiler-specific type name.
If argument does not have name, occurs the compilation error "Expression does not have a name.".

Nameof Enum

To check is nameof_enum supported compiler use macro NAMEOF_ENUM_SUPPORTED or constexpr constant nameof::is_nameof_enum_supported.
This library uses a compiler-specific hack (based on __PRETTY_FUNCTION__ / __FUNCSIG__), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 9.
Enum can't reflect if the enum is a forward declaration.
Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX]. By default MAGIC_ENUM_RANGE_MIN = -128, MAGIC_ENUM_RANGE_MAX = 128.
If need another range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN and MAGIC_ENUM_RANGE_MAX.
```
#define MAGIC_ENUM_RANGE_MIN 0
#define MAGIC_ENUM_RANGE_MAX 256
#include <magic_enum.hpp>
```

If need another range for specific enum type, add specialization enum_range for necessary enum type.

#include <magic_enum.hpp>

enum number { one = 100, two = 200, three = 300 };

namespace magic_enum {
template <>
struct enum_range<number> {
  static constexpr int min = 100;
  static constexpr int max = 300;
};
}

magic_enum obtains the first defined value enums, and won't work if value are aliased.

enum ShapeKind {
  ConvexBegin = 0,
  Box = 0, // Won't work.
  Sphere = 1,
  ConvexEnd = 2,
  Donut = 2, // Won't work too.
  Banana = 3,
  COUNT = 4,
};
// magic_enum::enum_cast<ShapeKind>("Box") -> std::nullopt
// magic_enum::enum_name(ShapeKind::Box) -> "ConvexBegin"

Work around the issue:

enum ShapeKind {
  // Convex shapes, see ConvexBegin and ConvexEnd below.
  Box = 0,
  Sphere = 1,

  // Non-convex shapes.
  Donut = 2,
  Banana = 3,

  COUNT = Banana + 1,

  // Non-reflected aliases.
  ConvexBegin = Box,
  ConvexEnd = Sphere + 1,
};
// magic_enum::enum_cast<ShapeKind>("Box") -> ShapeKind::Box
// magic_enum::enum_name(ShapeKind::Box) -> "Box"

// Non-reflected aliases.
// magic_enum::enum_cast<ShapeKind>("ConvexBegin") -> std::nullopt
// magic_enum::enum_name(ShapeKind::ConvexBegin) -> "Box"

2.6 KiB Raw Blame History

Nameof

Nameof Type

Nameof Enum

2.6 KiB

Raw Blame History