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std::ranges::cartesian_product_view<First, Vs...>::iterator<Const>::operator++,--,+=,-=

constexpr /*iterator*/& operator++();
 (1) (since C++23) 
constexpr void operator++( int );
 (2) (since C++23) 
constexpr /*iterator*/ operator++( int )
  requires ranges::forward_range</*maybe-const*/<Const, First>>;
 (3) (since C++23) 
constexpr /*iterator*/& operator--()
  requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>;
 (4) (since C++23) 
constexpr /*iterator*/ operator--( int )
  requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>;
 (5) (since C++23) 
constexpr /*iterator*/& operator+=( difference_type n )
  requires /*cartesian-product-is-random-access*/<Const, First, Vs...>;
 (6) (since C++23) 
constexpr /*iterator*/& operator-=( difference_type n )
  requires /*cartesian-product-is-random-access*/<Const, First, Vs...>;
 (7) (since C++23)

Increments or decrements the iterator.

Let current_ denote the underlying tuple of iterators and parent_ denote the underlying pointer to cartesian_product_view.

1) Equivalent to next(); return *this;
2) Equivalent to ++*this;
3) Equivalent to auto tmp = *this; ++*this; return tmp;
4) Equivalent to prev(); return *this;
5) Equivalent to auto tmp = *this; --*this; return tmp;
6) Sets the value of *this to ret, where ret is:
  • if n > 0, the value of *this provided that next been called n times. Otherwise,
  • if n < 0, the value of *this provided that prev been called -n times. Otherwise,
  • the value of *this before the call.
The behavior is undefined if n is not in the range [ranges::distance(*this, ranges::begin(*parent_)), ranges::distance(*this, ranges::end(*parent_))].
7) Equivalent to *this += -n; return *this;.

Parameters

n - position relative to current location

Return value

1,4,6,7) *this
2) (none)
3,5) a copy of *this that was made before the change.

Complexity

6) Constant.

Example

See also

(C++23)
 performs iterator arithmetic
(function)

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