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std::basic_const_iterator<Iter>::operator==,<,<=,>,>=,<=> - cppreference.com

来自cppreference.com

相等性比较

 
template< std::sentinel_for<Iter> S >
constexpr bool operator==( const S& s ) const;
(1) (C++23 起)

两个 basic_const_iterator 之间的关系比较

 
constexpr bool operator<( const basic_const_iterator& y ) const
    requires std::random_access_iterator<Iter>;
(2) (C++23 起) 
constexpr bool operator>( const basic_const_iterator& y ) const
    requires std::random_access_iterator<Iter>;
(3) (C++23 起) 
constexpr bool operator<=( const basic_const_iterator& y ) const
    requires std::random_access_iterator<Iter>;
(4) (C++23 起) 
constexpr bool operator>=( const basic_const_iterator& y ) const
    requires std::random_access_iterator<Iter>;
(5) (C++23 起) 
constexpr auto operator<=>( const basic_const_iterator& y ) const
    requires std::random_access_iterator<Iter> && std::three_way_comparable<Iter>;
(6) (C++23 起)

basic_const_iterator 和另一类型之间的关系比较

 
template< /*different-from*/<basic_const_iterator> I >
constexpr bool operator<( const I& y ) const
    requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;
(7) (C++23 起) 
template< /*different-from*/<basic_const_iterator> I >
constexpr bool operator>( const I& y ) const
    requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;
(8) (C++23 起) 
template< /*different-from*/<basic_const_iterator> I >
constexpr bool operator<=( const I& y ) const
    requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;
(9) (C++23 起) 
template< /*different-from*/<basic_const_iterator> I >
constexpr bool operator>=( const I& y ) const
    requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;
(10) (C++23 起) 
template< /*different-from*/<basic_const_iterator> I >
constexpr auto operator<=>( const I& y ) const
    requires std::random_access_iterator<Iter> &&
        std::totally_ordered_with<Iter, I> &&
        std::three_way_comparable_with<Iter, I>;
(11) (C++23 起)

比较 basic_const_iterator 和另一个值。

!= 运算符从 operator== 运算符合成。

当 std::same_as<I, basic_const_iterator<Iter>> 为 false 时 I 满足 /*different-from*/<basic_const_iterator>。

参数

返回值

1) base() == s

2) base() < y.base()

3) base() > y.base()

4) base() <= y.base()

5) base() >= y.base()

6) base() <=> y.base()

7) base() < y

8) base() > y

9) base() <= y

10) base() >= y

11) base() <=> y

注解

当 Iter 实现了 sentinel_for<Iter> 时，重载 (1) 可用于比较两个 basic_const_iterator<Iter> 值。

示例

参阅