nameof_module/src/nameof.hpp

// MIT License
//
// Copyright(c) 2016 - 2018 Terik23
//
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// of this software and associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
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// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
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#pragma once

inline constexpr const char* template_nameof_(const char* name, size_t length) {
  return length == 0 ? name
                     : (name[length - 1] == '.' || name[length - 1] == '>' || name[length - 1] == ':')
                           ? &name[length]
                           : template_nameof_(name, length - 1);
}

// Used to obtain the string name of a variable.
#define NAMEOF_VARIABLE(variable) template_nameof_variable(variable, #variable, sizeof(#variable) / sizeof(char) - 1)
template <typename T>
inline constexpr const char* template_nameof_variable(const T& validate_type, const char* name, size_t length) { return template_nameof_(name, length); }
#define NAMEOF_VAR(var) NAMEOF_VARIABLE(var)

// Used to obtain the string name of a type.
#define NAMEOF_TYPE(type) template_nameof_type<type>(#type)
template <typename T>
inline constexpr const char* template_nameof_type(const char* name) { return name; }

// Used to obtain the string name of a function.
#define NAMEOF_FUNCTION(function) template_nameof_function<decltype(function)>(#function, sizeof(#function) / sizeof(char) - 1)
template <typename T>
inline constexpr const char* template_nameof_function(const char* name, size_t length) { return template_nameof_(name, length); }
#define NAMEOF_FUN(fun) NAMEOF_FUNCTION(fun)