std::apply vs std::invoke

[toRatnesh]

Channel
C++Weekly

Topics
What is the difference between std::apply and std::invoke?
Why do we need both?

Length
5-10

[lefticus]

I like this one, thanks @toRatnesh !

[lefticus]

Notes:

• apply is for calling a Callable with arguments that have been packed into a tuple.
• invoke is for calling a Callable with arguments passed direction to the function.

Here's a sample implementation of both along with use examples.

https://compiler-explorer.com/z/jW11xaYro

[lefticus]

Coming in Ep 454