My understanding was the best practice is: #if __cplusplus >= 202002L // code #endif However, it does not work, even though I do compile with -std=c++20. Also, the output of g++ -x c++ -std=c++20 -dM -E - </dev/null | grep…
I wrote multiple simple C++ functions to convert byte sequences to string representations. It was pretty straight forward, I am sure my logic is right, I thought this to be extremely easy, until I started to print the strings and…
I'm using emplace_back to add structs to a std::vector as follows: struct ConfigurableShaderParameter { std::string variableName; std::string description; float defaultValue; float min; float max; float step; float value; }; std::vector<ConfigurableShaderParameter> parameters; std::string variableName, description; float defaultValue, min, max, step; //…
Can C++ modules in Visual Studio 2022 handle forward declarations? The following code has a circular dependency that I want to break using a forward declaration, but the compiler doesn't seem to recognize that it refers to the same type…
While porting legacy code to C++20, I replaced string literals (with expected UTF-8 encoded text) to UTF-8 string literals (the one prefixed with u8). Thereby, I ran into an issue with octal sequences which I used in the past to…
I'm trying modules using CMake and C++20. But cmake can't find clang-scan-deps program. But i can use it in my terminal so i don't know why it can't find it. Error message: ~/coding/cpp-modules > cmake --build ./build/Debug --target all [1/8]…
clangd seems to be unable to properly deserialize a source file that has both include and import declarations, therefore it assumes that there are ODR violations in my code. Nevertheless, code compiles and runs properly without any warnings, how do…
I was writing a compile-time parser but I am stuck on a problem which I don't know how to solve in C++. I am using Microsoft Visual Studio Community 2019, version 17.8.3 (latest). This is the code which is giving…
I have some asio code which is used for transferring a file from a client. This code is working correctly and is as follows: bool FileTransferBehaviour::ConnectAndTransferFile(const std::string& _sender, const std::string& _filePath, size_t _numBytes) { // use a coroutine to accept…
I am interested in calculating the nth term of higher order Fibonacci sequence in C++, using matrix exponentiation, while allowing n to be reasonably large (in the range of hundreds). The sequences I have described are not Fibonacci sequence only…