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operator==,!= (std::scoped_allocator_adaptor)

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( until C++20* )
( until C++20* )
( until C++20* )

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std::scoped_allocator_adaptor
定义于头文件 <scoped_allocator>
template < class OuterAlloc1, class OuterAlloc2, class ... InnerAllocs >

bool operator == ( const scoped_allocator_adaptor < OuterAlloc1, InnerAllocs... > & lhs,

const scoped_allocator_adaptor < OuterAlloc2, InnerAllocs... > & rhs ) noexcept ;
(C++11 起)
template < class OuterAlloc1, class OuterAlloc2, class ... InnerAllocs >

bool operator ! = ( const scoped_allocator_adaptor < OuterAlloc1, InnerAllocs... > & lhs,

const scoped_allocator_adaptor < OuterAlloc2, InnerAllocs... > & rhs ) noexcept ;
(C++11 起)
(C++20 前)

比较两个作用域分配器适配器。两个这样的分配器在以下情况下相等：

  • lhs. outer_allocator ( ) == rhs. outer_allocator ( ) ，以及
  • 若 sizeof... ( InnerAllocs ) > 0 ，则 lhs. inner_allocator ( ) == rhs. inner_allocator ( ) 。

!= 运算符由 operator== 合成生成 。

(since C++20)

参数

lhs, rhs - 用于比较的作用域分配器适配器

返回值

1) 若 lhs 与 rhs 相等则返回 true ，否则返回 false 。
2) 若 lhs 与 rhs 不相等则返回 true ，否则返回 false 。