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Questions - fold-expression

C++17 can variadic template class define new type and variadic data member?

#include <iostream> template <typename T0, typename T1> struct Clazz { void doSomething(const std::shared_ptr<T0>& p0, const std::shared_ptr<T1>& p1) {...
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xishvai

c++

class

c++17

variadic-templates

fold-expression

Votes: 0

Answers: 2

Latest Answer

You can use std::tuple, also for the param_type. In case you want a tuple of shared pointers, that is: #include <tuple> #include <iostream> #include <memory> template <typename.....
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463035818_is_not_a_number

How do I restrict fold expressions with C++ 20 requirements/concepts?

How do you restrict the allowed types in variadic templates and fold expression using C++20 concepts? For example suppose I'd like to restrict the following fold expression to only support integral ty...
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Gonen I

c++

variadic-templates

c++20

c++-concepts

fold-expression

Votes: 0

Answers: 2

Latest Answer

The minimal change to make it work is: requires (std::is_integral<Args>::value && ...) I'd also suggest using the less verbose is_integral_v<...> instead of is_integral<...>...
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HolyBlackCat

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