operator-(ranges::chunk_view::outer-iterator)

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< cpp‎ | ranges‎ | chunk view‎ | outer iterator
C++
Ranges library
Range adaptors
std::ranges::chunk_view
Member functions
Classes for input_ranges
Deduction guides
outer-iterator
operator-(chunk_view::outer-iterator)
outer-iterator::value_type
inner-iterator
friend constexpr difference_type operator- ( std::default_sentinel_t s,

const /*outer-iterator*/ & i )
    requires ranges:: sized_sentinel_for < ranges::sentinel_t <V>,

ranges::iterator_t <V>> ;
(1) (since C++23)
friend constexpr difference_type operator- ( const /*outer-iterator*/ & i,

std::default_sentinel_t s )
    requires ranges:: sized_sentinel_for < ranges::sentinel_t <V>,

ranges::iterator_t <V>> ;
(2) (since C++23)

Calculates the distance (in number of chunks) between the iterator and sentinel

Let parent_ be the underlying pointer to enclosing chunk_view.

1) Equivalent to: 
const auto dist = ranges::end(i.parent_->base_) - *i.parent_->current_;
if (dist < i.parent_->remainder_)
    return dist == 0 ? 0 : 1;
return /*div-ceil*/(dist - i.parent_->remainder_, i.parent_->n_) + 1;
2) Equivalent to: return -(s - i);

These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::ranges::chunk_view::outer-iterator

Parameters

i - the iterator
s - the sentinel

Return value

The distance between given iterator and sentinel.

Example

This section is incomplete
Reason: no example

See also

(C++23)
 increments the iterator
(public member function)
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