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deduction guides for std::scoped_allocator_adaptor

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)
定义于头文件 <scoped_allocator>
template < class OuterAlloc, class ... InnerAllocs >

scoped_allocator_adaptor ( OuterAlloc, InnerAllocs... )

- > scoped_allocator_adaptor < OuterAlloc, InnerAllocs... > ;
(C++17 起)

std::scoped_allocator_adaptor 提供了一个 推导指引 ,使其能够推导出外层分配器。

示例