I'm trying to implement an ad-hoc light weight state machine using std::variant. However, it seems that the variant fsm isn't declared right as it fails with th
I want to create a nice table in stdout. The table has a lot of headers that are mainly compiletime strings. For example: std::cout << fmt::format("|{0:-^
I'm new to c++ and i miss many knowledge about it. Mostly i get the work done by try and error. But now i stuck on setting up a test project for a websocket se
As far as I know, since C++17 some STL data structures may "exist" with an incomplete type as the template parameter which describes the type stored. For exampl
Basically, this code fails with a very strange error: <source>:75:29: error: cannot convert 'get_view<main()::<unnamed struct>, run_time::data_vi
I've just read What is the purpose of std::launder? and frankly, I am left scratching my head. Let's start with the second example in @NicolBolas' accepted answ
I am implementing a class that uses Named Parameter Idiom to initialise its members: class Person { public: Person & first_name(std::string n)
Given the code // somewhere in the program const char* p1 = "Hello World"; // somewhere else in the program const char* p2 = "Hello World"; is there a way t
I'm trying to understand the example of std::visit from cppreference, Where I saw the following line of code: template<class... Ts> struct overloaded : T
I have some var = std::variant<std::monostate, a, b, c> when a, b, c is some types. How, at runtime, do I check what type var contains? In the official do
For my matrix class I want to do some sort of operator overloading (probably using expression templates) on range-v3 views for + - / * % . For example if I want
P0137 introduces the function template std::launder and makes many, many changes to the standard in the sections concerning unions, lifetime, and pointers. Wh
Context: In my company we generate a lot of types based on IDL files. Some of the types require special logic so they are handcoded but follow the same pattern
Not sure where to ask (feel free to close this if it is an inappropriate question) but I have not found anything on this specifically in C++17 proposals, neithe
Consider this piece of code: struct Base { int x; }; struct Bar : Base { int y; }; struct Foo : Base { int z; }; Bar* bar = new Bar; Foo* foo =
While implementing a compressed_tuple class for some project I'm working on, I ran into the following issue: I can't seem to pass instances of this type to std:
To create a time point for the current time, you can use: std::chrono::system_clock::now(). I cannot figure out, however, how to create a time point given milli
In below C++ program I'm deleting a previous character considering '#' as a backspace character. I have used stack to build the string. Is there any C++ STL alg
I read The most elegant way to iterate the words of a string and enjoyed the succinctness of the answer. Now I want to do the same for string_view. Problem is,
What exactly is the point of the construct std::observer_ptr in the library fundamentals technical specification V2? It seems to me that all it does is wrap a