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C++ - constexpr-if with std::is_copy_assignable?

This code snippet Foo x; Foo other; if constexpr (std::is_copy_assignable_v) { other = x; } is pesent in a non-template function. So the compiler checks the validaty of the code. On the other han...

Tags: c++, c++17, type-traits

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C++ Fundamentals: Template operator- overloading Failed - "template argument deduction/substitution failed"?

first of all, I have done this exact thing before, and I would recommend using a class over a struct, either way, if you want the operator - to work on MyVector.end() - MyVector.begin() it has to go i...

Tags: c++, c++14

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C++ - Can I access the value of a derived-class member in a function running in a std::jthread from which I derive?

This is undefined behavior. I am not 100% certain that means the thread begins execution as soon as the jthread base object is constructed No, that means that the new thread begins executing at some...

Tags: c++, multithreading, derived-class

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How can I pass a C++ struct to a C# DLL method using COM interop?

It depends on the struct definition and types (it must describable by a type library), but yes, you can create a struct like this in C# [ComVisible(true)] [StructLayout(LayoutKind.Sequential)] public...

Tags: c#, c++, com

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Why is my C++ program running fine with the debugger but not without it?

Your compiler should warn you about this; if it does not, turn up your warnings! Vector() : _size(0), _capacity(8), _array(new T[_capacity]) You are trying to initialize your _array last, however, s...

Tags: c++, vector, initialization

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C++ - Displaying the number from the sequence by using the sequence ID?

You were on the right track using the remainder operator % (modulo), however you used the wrong divisor. A divisor of 10 will repeat a sequence of 10 numbers, whereas what you need is 4 numbers. So th...

Tags: c++, sequence

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C++ - Why does class template argument deduction fail when omitting empty angle brackets?

template< class IntType = int > class uniform_int_distribution; The class only has one template parameter and it is int by default. In std::uniform_int_distribution dis(0, array.size() - 1); you are...

Tags: c++, templates, template-argument-deduction

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C++ Asks the user for a series of integers one at a time and when the user enters the integer 0, the program shows some info about the inputs?

I feel generous: #include #include using std::vector; using std::cout; using std::cin; int main() { int number; vector database; cout > number) { if (number == 0) break;...

Tags: c++

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Python - Duplicate entries in Array?

You are right, 2 is larger than 1. However we still have other equal numbers which the difference of their abs value is

Tags: python, c++

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C++ - Expression without parentheses works in one case but not in other?

I want to know why is the == version not compile but the || version does? Because the standard grammar explicitly allows || in a require-clause without parentheses but not == as explained below.. Fr...

Tags: c++, language-lawyer

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