std::ranges::transform_view<V,F>::iterator<Const>::operator++,--,+=,-=

From cppreference.com
< cpp‎ | ranges‎ | transform view‎ | iterator
Ranges library
Range adaptors
constexpr /*iterator*/ & operator++ ( ) ;
(1) (since C++20)
constexpr void operator++ ( int ) ;
(2) (since C++20)
constexpr /*iterator*/ operator++ ( int )
  requires ranges::forward_range <Base> ;
(3) (since C++20)
constexpr /*iterator*/ & operator-- ( )
  requires ranges::bidirectional_range <Base> ;
(4) (since C++20)
constexpr /*iterator*/ operator-- ( int )
  requires ranges::bidirectional_range <Base> ;
(5) (since C++20)
constexpr /*iterator*/ & operator+ = ( difference_type n )
  requires ranges::random_access_range <Base> ;
(6) (since C++20)
constexpr /*iterator*/ & operator- = ( difference_type n )
  requires ranges::random_access_range <Base> ;
(7) (since C++20)

Increments or decrements the iterator.

Let current_ be the underlying iterator.

1) Equivalent to ++current_; return *this;
2) Equivalent to ++current_;
3) Equivalent to auto tmp = *this; ++*this; return tmp;
4) Equivalent to --current_; return *this;
5) Equivalent to auto tmp = *this; --*this; return tmp;
6) Equivalent to current_ += n; return *this;
7) Equivalent to current_ -= n; return *this;

Parameters

n - position relative to current location

Return value

1,4,6,7) *this
3,5) a copy of *this that was made before the change