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operators (std::basic_string_view)

运算符=，%21=，<，<=，>，>=%28std：：basic[医]弦[医]视图%29

Defined in header ​​
template< class CharT, class Traits > constexpr bool operator==( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (1)(since C++17)
template< class CharT, class Traits > constexpr bool operator!=( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (2)(since C++17)
template< class CharT, class Traits > constexpr bool operator<( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (3)(since C++17)
template< class CharT, class Traits > constexpr bool operator<=( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (4)(since C++17)
template< class CharT, class Traits > constexpr bool operator>( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (5)(since C++17)
template< class CharT, class Traits > constexpr bool operator>=( basic_string_view <CharT,Traits> lhs, basic_string_view <CharT,Traits> rhs (6)(since C++17)

比较两个视图。

所有比较都是通过compare()成员函数%28，它本身是根据Traits::compare()29%：

  • 如果两个视图的大小都相同，则两个视图是相等的。lhs和rhs中的每个字符都是相等的。lhs中具有等效字符的rhs在同一位置。

  • 排序比较是按字典顺序进行的--通过一个等价于std::lexicographical_compare...

执行应提供足够的额外constexpr和noexcept重载这些函数，以便basic_string_view<CharT,Traits>对象sv可以与另一个对象相比较t的隐式转换为basic_string_view<CharT,Traits>，其语义与比较相同sv和basic_string_view<CharT,Traits>(t)...

参数

lhs, rhs-views to compare

返回值

true如果相应的比较成立，false否则。

例外

noexcept规格：

noexcept

复杂性

视图的大小成线性。

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