I have a simple struct containing three fields and a spaceship operator <=> as follows: using MyStruct = struct MyStruct { unsigned id; std::filesystem::path sourcePath; std::string functionName; auto operator<=>(const MyStruct&) const = default; }; The data is initialized as shown…
From Is std::unique_ptr required to know the full definition of T?, I know that if a class A has a member unique_ptr<T>, then T shall be a complete type in destructor ~A(). However, I came across a situation that the…
The following piece of code takes ~700 ms to run in Debug mode (Visual Studio 2017). I have read numerous questions on how to speed it up, but the majority of things I tried does not seem to have any…
I try to write a program check a string is Palindrone or not using vector and iterator. I create definition in iterator.h file:- #pragma once #ifndef iterator #define iterator template<typename Bidrectional> bool isPalindrone(Bidrectional first, Bidrectional end); template<typename Bidrectional> inline bool…
In the following code, why is std::make_unique necessary to initialize Foo::up_? Specifically, why doesn't initializing Foo::up_ with new Bar(...) -- as in the commented-out code -- work? #include <iostream> #include <memory> enum E { Y = 0, Z = 1,…
This question is a follow-up to Why doesn't returning a std::unique_ptr violate unique_ptr's deleted copy constructor? (which is answered here: Returning unique_ptr from functions ) This leads me back to the original problem I'd faced. I have to work with…