Nameof C++

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What is Nameof?

Header-only C++17 library provides nameof macros and functions to obtain simple name of variable, type, function, macro, and enum.

Features

• C++17
• Header-only
• Dependency-free
• Compile-time
• Name of variable, member variable
• Name of type, variable type
• Name of function, member function
• Name of enum, enum variable
• Name of macro
• Enum to string

Examples

• Name of variable

  // Name of variable.
  NAMEOF(somevar) -> "somevar"
  
  // Name of member variable.
  NAMEOF(person.address.zip_code) -> "zip_code"
  

• Name of function

  // Name of function.
  NAMEOF(foo<int, float>()) -> "foo"
  NAMEOF_FULL(foo<int, float>()) -> "foo<int, float>"
  
  // Name of member function.
  NAMEOF(somevar.some_method()) -> "some_method"
  NAMEOF_FULL(somevar.some_method<int>()) -> "some_method<int>"
  

• Name of enum

  auto color = Color::RED;
  // Name of enum variable.
  NAMEOF_ENUM(color) -> "RED"
  nameof::nameof_enum(color) -> "RED"
  
  constexpr auto const_color = Color::BLUE;
  // Name of static storage enum variable.
  NAMEOF_CONST_ENUM(const_color) -> "BLUE"
  nameof::nameof_enum<const_color>() -> "BLUE"
  

• Name of type

  using T = int;
  T var = 42;
  // Name of variable type.
  NAMEOF_VAR_TYPE(var) -> "int"
  nameof::nameof_type<decltype(var)>() -> "int"
  
  // Name of type.
  NAMEOF_TYPE(T) -> "int"
  nameof::nameof_type<T>() -> "int"
  

• Name of macro

  // Name of macro.
  NAMEOF(__LINE__) -> "__LINE__"
  NAMEOF(NAMEOF(structvar)) -> "NAMEOF"
  

Remarks

• Nameof return std::string_view. If arguments does not have name, Nameof return empty string.

• Nameof expression arguments are identified, but do not evaluated.

• Enum variable must be in range (-NAMEOF_ENUM_RANGE, NAMEOF_ENUM_RANGE). By default NAMEOF_ENUM_RANGE = 128. If you need a larger range, redefine the macro NAMEOF_ENUM_RANGE.

  #define NAMEOF_ENUM_RANGE 1028 // Redefine NAMEOF_ENUM_RANGE for larger range.
  #include <nameof.hpp>
  

• If you need of raw fully-qualified name, use NAMEOF_RAW.

  NAMEOF_RAW(somevar.somefield) -> "somevar.somefield"
  NAMEOF_RAW(&some_class::some_method<int>) -> "&some_class::some_method<int>"
  

• Spaces and Tabs ignored

  NAMEOF(   somevar   ) -> "somevar"
  NAMEOF(	somevar	) -> "somevar"
  

Integration

You should add required file nameof.hpp.

Compiler compatibility

• Clang/LLVM >= 5
• Visual C++ >= 15.3 / Visual Studio >= 2017
• Xcode >= 9
• GCC >= 7 (GCC >= 9 for NAMEOF_ENUM)

Licensed under the MIT License