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std::pmr::memory_resource:: memory_resource

From cppreference.net
Memory management library
( exposition only* )
Allocators
Uninitialized memory algorithms
Constrained uninitialized memory algorithms
Memory resources
Uninitialized storage (until C++20)
( until C++20* )
( until C++20* )
( until C++20* )

Garbage collector support (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
memory_resource ( ) = default ;
(1) (since C++17)
(implicitly declared)
memory_resource ( const memory_resource & ) = default ;
(2) (since C++17)
(implicitly declared)
1) Implicitly declared default constructor.
2) Implicitly declared copy constructor.