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std::experimental::ranges::tagged<Base,Tags...>:: operator=

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C++
Experimental
Ranges
General utilities library
std::experimental::ranges::tagged
tagged & operator = ( tagged && that ) = default ;
(1)
tagged & operator = ( const tagged & that ) = default ;
(2)
template < class Other >

requires Assignable < Base & , Other >
constexpr tagged & operator = ( ranges:: tagged < Other, Tags... > && that )

noexcept ( std:: is_nothrow_assignable < Base & , Other > :: value ) ;
(3)
template < class Other >

requires Assignable < Base & , const Other & >

constexpr tagged & operator = ( const ranges:: tagged < Other, Tags... > & that ) ;
(4)
template < class U >

requires Assignable < Base & , U > && ! Same < std:: decay_t < U > , tagged >

constexpr tagged & operator = ( U && that ) noexcept ( std:: is_nothrow_assignable < Base & , U > :: value ) ;
(5)

将 that 的内容赋值给 * this 。

1,2) tagged 具有默认的复制和移动赋值运算符，这些运算符会调用 Base 的对应赋值运算符。
3) 从具有匹配标签的不同 tagged 特化版本转换移动赋值操作。等效于 static_cast < Base & > ( * this ) = static_cast < Other && > ( that ) ; 。
4) 从具有匹配标签的不同 tagged 特化进行复制赋值转换。等效于 static_cast < Base & > ( * this ) = static_cast < const Other & > ( that ) ; 。
5) 将 that 赋值给 Base 子对象。等价于 static_cast < Base & > ( * this ) = std:: forward < U > ( that ) ; 。

返回值

* this 。