deductiongu...td::weak_ptr(3)

🌸 NAME 🌸

okay so bestie, welcome to the deductionguidesforstd::weak_ptr page — it's a (3) page from the C++ Standard Libary. The NAME is literally deductionguidesforstd::weak_ptr — deductionguidesforstd::weak_ptr. yes, same thing twice, iconic.

✨ Synopsis ✨

it's giving header info, so here's the setup:

• Defined in header <memory>
• Since C++17:

template< class T >
weak_ptr( std::shared_ptr<T> ) -> weak_ptr<T>;

There's literally one deduction guide provided for std::weak_ptr, and its whole job is to account for the edge case that the implicit deduction guides missed. no cap 🫶

🎀 Example 🎀

run this code, bestie:

// Run this code

#include <memory>

int main()
{
    auto p = std::make_shared<int>(42);
    std::weak_ptr w{p}; // explicit deduction guide is used in this case
}

That little comment? It's saying the explicit deduction guide is used in this case. periodt 💅

mwah 💋 this page comes from http://cppreference.com, dated 2024.06.10, and it's the deductiongu...td::weak_ptr(3) page. bye bestie 🦋