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operator- (std::basic_const_iterator)

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C++
Iterator library
Iterator concepts
Iterator primitives
Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
(C++20)
(C++20)
(C++20)
Utilities
(C++20)
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Range access
(C++11) (C++14)
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std::basic_const_iterator
Member functions
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(C++23) (C++23) (C++23) (C++23)
(C++23)
operator-
(C++23)
(C++23)
Helper classes
(C++23)
template < std:: sized_sentinel_for < Iter > S >
constexpr difference_type operator - ( const S & s ) const ;
(1) (C++23 起)
template < /*not-a-const-iterator*/ S >

requires std:: sized_sentinel_for < S, Iter >
friend constexpr difference_type

operator - ( const S & s, const basic_const_iterator & i ) ;
(2) (C++23 起)

返回 basic_const_iterator 与其哨位之间的距离。

S 满足仅用于说明的概念 /*not-a-const-iterator*/ 当且仅当它不是 basic_const_iterator 的特化。

参数

i, s - 用于计算差值的迭代器和哨兵

返回值

1) base ( ) - s
2) s - i. base ( )

示例

本节内容不完整
原因：缺少示例