In python, you can make an instance become a callable obj, like below shows: # py code snippet class Demo: def __call__(self): print("Demo's instance callable") Demo()() # Demo's instance is callable In js, is there the same feature like shown…
In Dart, I can override the toString method to change the string content returned by an object when it is used as a string. I need to change the object's behavior when it is used as a double. I would…
I'm a student who is learning C++ (especially the operator overloading part). During my study, I found the following code that uses operator overloading doesn't make an expected output. At first, the code with which I have trouble is the...…
I have my own memory manager in linux (ubuntu) in order to detect memory leaks or memory corruption in my c/c++ code. To use my own memory manager just I've overloaded new/delete global operators like that, void *operator new (size_t…
The builtin operator-> is defined as (*p).m, which is just fine for my iterator, so overloading it would just waste my time and the maintainer's eyes. Just trying it wouldn't guarantee portability, and I haven't been able to find an…
I am studying cpp now, when i implement a card class with the print operator it's sad"Invalid operands to binary expression ('std::ostream' (aka 'basic_ostream') and 'const Suits')" .Also, I'm using Xcode for IDE. Thanks for the help! #include <iostream> enum…
This C++ code compiles and runs perfectly, as I expect: template <typename T> struct S { T *p; }; template <typename T> bool operator == (S<T> &a, S<T> &b) { return a.p == b.p; } int main () { int…
I have a simple unit-test using Catch 2.11.1: #define CATCH_CONFIG_MAIN #include "catch.hpp" #include <utility> #include <any> namespace A::B { namespace C { struct S { }; } using type = std::pair<C::S, std::any>; } inline bool operator==(A::B::type const&, A::B::type const&) {…