136 lines
4.9 KiB
C++
136 lines
4.9 KiB
C++
// nameof example
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//
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// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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// Copyright (c) 2018 Daniil Goncharov <neargye@gmail.com>.
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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 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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#include <nameof.hpp>
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#include <iostream>
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#include <stdexcept>
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struct SomeStruct {
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int somefield;
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void SomeMethod1(const int i) {
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somefield = i;
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std::cout << "No called!" << std::endl;
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}
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int SomeMethod2() const {
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std::cout << "No called!" << std::endl;
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return somefield;
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}
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};
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void SomeMethod3() { std::cout << "No called!" << std::endl; }
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struct Long {
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struct LL {
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int field;
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};
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LL ll;
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};
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enum class Color { RED, GREEN, BLUE };
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SomeStruct somevar;
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Long othervar;
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int intvar;
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SomeStruct* ptrvar;
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SomeStruct** ptrptrvar;
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int main() {
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// constexpr
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constexpr auto constexpr_work_fine = NAMEOF(intvar);
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std::cout << constexpr_work_fine << std::endl; // intvar
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// enum
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std::cout << NAMEOF(Color::RED) << std::endl; // RED
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// variable
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std::cout << NAMEOF(somevar) << std::endl; // somevar
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std::cout << NAMEOF(::somevar) << std::endl; // somevar
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std::cout << NAMEOF(&somevar) << std::endl; // somevar
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// member
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std::cout << NAMEOF(somevar.somefield) << std::endl; // somefield
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std::cout << NAMEOF((&somevar)->somefield) << std::endl; // somefield
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// member
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std::cout << NAMEOF(othervar.ll.field) << std::endl; // field
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// variable
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std::cout << NAMEOF(ptrvar) << std::endl; // ptrvar
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std::cout << NAMEOF(*ptrvar) << std::endl; // ptrvar
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// variable
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std::cout << NAMEOF(ptrptrvar) << std::endl; // ptrptrvar
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std::cout << NAMEOF(*ptrptrvar) << std::endl; // ptrptrvar
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std::cout << NAMEOF(**ptrptrvar) << std::endl; // ptrptrvar
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// variable
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std::cout << NAMEOF(+intvar) << std::endl; // intvar
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std::cout << NAMEOF(-intvar) << std::endl; // intvar
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std::cout << NAMEOF(~intvar) << std::endl; // intvar
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std::cout << NAMEOF(!intvar) << std::endl; // intvar
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// function
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std::cout << NAMEOF(&SomeStruct::SomeMethod2) << std::endl; // SomeMethod2
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std::cout << NAMEOF(SomeMethod3) << std::endl; // SomeMethod3
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// type
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std::cout << NAMEOF(int[]) << std::endl; // int[]
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std::cout << NAMEOF(SomeStruct) << std::endl; // SomeStruct
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std::cout << NAMEOF(Long::LL) << std::endl; // LL
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std::cout << NAMEOF(volatile const int) << std::endl; // volatile const int
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// macros
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std::cout << NAMEOF(__LINE__) << std::endl; // __LINE__
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std::cout << NAMEOF(__FILE__) << std::endl; // __FILE__
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// full name
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std::cout << NAMEOF_FULL(somevar.somefield) << std::endl; // somevar.somefield
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std::cout << NAMEOF_FULL(&SomeStruct::SomeMethod2) << std::endl; // &SomeStruct::SomeMethod2
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std::cout << NAMEOF_FULL(Long::LL) << std::endl; // Long::LL
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std::cout << NAMEOF_FULL(std::string) << std::endl; // std::string
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const auto div = [](int x, int y) -> int {
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if (y == 0) {
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throw std::invalid_argument(std::string(NAMEOF(y)).append(" should not be zero!"));
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}
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return x / y;
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};
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try {
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const int z = div(10, 0);
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std::cout << z << std::endl;
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} catch (const std::exception& e) {
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std::cout << e.what() << std::endl; // y should not be zero!
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}
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std::cout << NAMEOF(main) << " method entry" << std::endl; // main method entry
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/* Remarks */
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// Spaces and Tabs ignored
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std::cout << NAMEOF( std::string ) << std::endl; // string
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std::cout << NAMEOF( std::string ) << std::endl; // string
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// Bad case
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std::cout << NAMEOF(std::string()) << std::endl; // "string()"
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std::cout << NAMEOF(std::string{}) << std::endl; // "string{}"
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std::cout << NAMEOF(std::string{"test"}) << std::endl; // "string{"test"}"
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std::cout << NAMEOF(ptrvar[0]) << std::endl; // "ptrvar[0]"
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std::cout << NAMEOF(intvar + intvar) << std::endl; // " intvar"
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std::cout << NAMEOF(NAMEOF(intvar)) << std::endl; // "NAMEOF(intvar)"
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std::cout << NAMEOF(std::cout << intvar << std::endl) << std::endl; // "endl"
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return 0;
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}
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