Docs4dev
Docs
cpp / latest / memory / allocator / allocator.html

std::allocator<T>::allocator

(1) 
allocator() throw();
 (until C++11) 
allocator() noexcept;
 (since C++11)
(until C++20)		 
constexpr allocator() noexcept;
 (since C++20)
(2) 
allocator( const allocator& other ) throw();
 (until C++11) 
allocator( const allocator& other ) noexcept;
 (since C++11)
(until C++20)		 
constexpr allocator( const allocator& other ) noexcept;
 (since C++20)
(3) 
template< class U >
allocator( const allocator<U>& other ) throw();
 (until C++11) 
template< class U >
allocator( const allocator<U>& other ) noexcept;
 (since C++11)
(until C++20)		 
template< class U >
constexpr allocator( const allocator<U>& other ) noexcept;
 (since C++20)

Constructs the default allocator. Since the default allocator is stateless, the constructors have no visible effect.

Parameters

other - another allocator to construct with

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/memory/allocator/allocator