// nameof c++ example // // Licensed under the MIT License . // Copyright (c) 2018 Daniil Goncharov . // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in all // copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. #include #include #include struct SomeStruct { int somefield; void SomeMethod1(const int i) { somefield = i; std::cout << "No called!" << std::endl; } int SomeMethod2() const { std::cout << "No called!" << std::endl; return somefield; } }; void SomeMethod3() { std::cout << "No called!" << std::endl; } struct Long { struct LL { int field; }; LL ll; }; int somevar; enum class Color { RED, GREEN, BLUE }; void TestCase1() { SomeStruct somevar; Long othervar; int intvar; SomeStruct* ptrvar; SomeStruct** ptrptrvar; // constexpr constexpr auto constexpr_work_fine = NAMEOF(intvar); std::cout << constexpr_work_fine << std::endl; // intvar // enum std::cout << NAMEOF(Color::RED) << std::endl; // RED // variable std::cout << NAMEOF(somevar) << std::endl; // somevar std::cout << NAMEOF(::somevar) << std::endl; // somevar std::cout << NAMEOF(&somevar) << std::endl; // somevar // member std::cout << NAMEOF(somevar.somefield) << std::endl; // somefield std::cout << NAMEOF((&somevar)->somefield) << std::endl; // somefield // member std::cout << NAMEOF(othervar.ll.field) << std::endl; // field // variable std::cout << NAMEOF(ptrvar) << std::endl; // ptrvar std::cout << NAMEOF(*ptrvar) << std::endl; // ptrvar // variable std::cout << NAMEOF(ptrptrvar) << std::endl; // ptrptrvar std::cout << NAMEOF(*ptrptrvar) << std::endl; // ptrptrvar std::cout << NAMEOF(**ptrptrvar) << std::endl; // ptrptrvar // variable std::cout << NAMEOF(+intvar) << std::endl; // intvar std::cout << NAMEOF(-intvar) << std::endl; // intvar std::cout << NAMEOF(~intvar) << std::endl; // intvar std::cout << NAMEOF(!intvar) << std::endl; // intvar // function std::cout << NAMEOF(&SomeStruct::SomeMethod2) << std::endl; // SomeMethod2 std::cout << NAMEOF(SomeMethod3) << std::endl; // SomeMethod3 // type std::cout << NAMEOF(int[]) << std::endl; // int[] std::cout << NAMEOF(SomeStruct) << std::endl; // SomeStruct std::cout << NAMEOF(Long::LL) << std::endl; // LL std::cout << NAMEOF(volatile const int) << std::endl; // volatile const int // macros std::cout << NAMEOF(__LINE__) << std::endl; // __LINE__ std::cout << NAMEOF(__FILE__) << std::endl; // __FILE__ // full name std::cout << NAMEOF_FULL(somevar.somefield) << std::endl; // somevar.somefield std::cout << NAMEOF_FULL(&SomeStruct::SomeMethod2) << std::endl; // &SomeStruct::SomeMethod2 std::cout << NAMEOF_FULL(Long::LL) << std::endl; // Long::LL std::cout << NAMEOF_FULL(std::string) << std::endl; // std::string } void TestCase2() { const auto div = [](int x, int y) { if (y == 0) { throw std::invalid_argument(std::string(NAMEOF(y)).append(" should not be zero!")); } return x / y; }; try { const int z = div(10, 0); std::cout << z << std::endl; } catch (const std::exception& e) { std::cout << e.what() << std::endl; // y should not be zero! } } void TestCase3() { std::cout << NAMEOF(TestCase3) << " method entry" << std::endl; // TestCase3 method entry } int main() { TestCase1(); TestCase2(); TestCase3(); return 0; }