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    std::allocator<T>:: allocator

    From ja.cppreference.net
    C++
    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)
    std::allocator
    (1)
    allocator ( ) throw ( ) ;
    		(C++11まで)
    allocator ( ) noexcept ;
    		(C++11から)
    (C++20まで)
    constexpr allocator ( ) noexcept ;
    		(C++20から)
    (2)
    allocator ( const allocator & other ) throw ( ) ;
    		(C++11まで)
    allocator ( const allocator & other ) noexcept ;
    		(C++11から)
    (C++20まで)
    constexpr allocator ( const allocator & other ) noexcept ;
    		(C++20から)
    (3)
    template < class U >
    allocator ( const allocator < U > & other ) throw ( ) ;
    		(C++11まで)
    template < class U >
    allocator ( const allocator < U > & other ) noexcept ;
    		(C++11から)
    (C++20まで)
    template < class U >
    constexpr allocator ( const allocator < U > & other ) noexcept ;
    		(C++20から)

    デフォルトのアロケータを構築します。デフォルトのアロケータはステートレスであるため、コンストラクタには可視的な効果はありません。

    パラメータ

    other - 構築に使用する別のアロケータ