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

From cppreference.com
 
 
 
 
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;

[edit] Parameters

n - position relative to current location

[edit] Return value

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