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operator-(std::reverse_iterator)

From cppreference.com
 
 
Iterator library
Iterator concepts
Iterator primitives
Iterator adaptors
Stream iterators
Iterator customization points
Iterator operations
(C++11)
(C++11)
Range access
(C++11)(C++14)
(C++11)(C++14)
(C++17)(C++20)
(C++14)(C++14)
(C++14)(C++14)
(C++17)
(C++17)
 
 
template< class Iterator >

typename reverse_iterator<Iterator>::difference_type
    operator-( const reverse_iterator<Iterator>& lhs,

               const reverse_iterator<Iterator>& rhs );
(until C++11)
template< class Iterator1, class Iterator2 >

auto operator-( const reverse_iterator<Iterator1>& lhs,
                const reverse_iterator<Iterator2>& rhs

              ) -> decltype(rhs.base() - lhs.base());
(since C++11)
(until C++17)
template< class Iterator1, class Iterator2 >

constexpr auto operator-( const reverse_iterator<Iterator1>& lhs,
                          const reverse_iterator<Iterator2>& rhs

                        ) -> decltype(rhs.base() - lhs.base());
(since C++17)

Returns the distance between two iterator adaptors.

[edit] Parameters

lhs, rhs - iterator adaptors to compute the difference of

[edit] Return value

rhs.base() - lhs.base()

[edit] Example