69 lines
No EOL
3.1 KiB
C++
69 lines
No EOL
3.1 KiB
C++
// MIT License
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//
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// Copyright(c) 2016 - 2018 Terik23
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files(the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions :
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//
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// The above copyright notice and this permission notice shall be included in
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// all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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inline constexpr const char* template_nameof_(const char* name, size_t length) {
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return length == 0 ? name
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: (name[length - 1] == '.' || name[length - 1] == '>' || name[length - 1] == ':')
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? &name[length]
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: template_nameof_(name, length - 1);
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}
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// Used to obtain the string name of a variable.
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#define nameof_variable(variable) template_nameof_variable(variable, #variable, sizeof(#variable) / sizeof(char) - 1)
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template <typename T>
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inline constexpr const char* template_nameof_variable(const T& validate_type, const char* name, size_t length) { return template_nameof_(name, length); }
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// Used to obtain the string name of a type.
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#define nameof_type(type) template_nameof_type<type>(#type)
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template <typename T> inline constexpr const char* template_nameof_type(const char* name) { return name; }
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// Used to obtain the string name of a function.
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#define nameof_function(function) template_nameof_function(#function, sizeof(#function) / sizeof(char) - 1); if (false) (void)(function);
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inline constexpr const char* template_nameof_function(const char* name, size_t length) { return template_nameof_(name, length); }
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// Example.
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#include <iostream>
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struct SomeStruct {
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int SomeField;
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void SomeMethod() { std::cout << "No called!" << std::endl; }
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};
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int someVar = 0;
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int main() {
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SomeStruct someVar{1};
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constexpr auto a = nameof_variable(someVar.SomeField);
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constexpr auto b = nameof_variable((&someVar)->SomeField);
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constexpr auto c = nameof_variable(someVar);
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constexpr auto d = nameof_variable(::someVar);
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constexpr auto e = nameof_variable(&SomeStruct::SomeMethod);
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constexpr auto f = nameof_function(someVar.SomeMethod());
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std::cout << a << std::endl; // SomeField
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std::cout << b << std::endl; // SomeField
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std::cout << c << std::endl; // someVar
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std::cout << d << std::endl; // someVar
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std::cout << e << std::endl; // SomeMethod
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std::cout << f << std::endl; // SomeMethod()
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} |