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

friend constexpr difference_type operator-( std::default_sentinel_t s,
                                            const /*inner-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 /*inner-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 underlying elements) between the iterator and sentinel.

Let parent_ be the underlying pointer to the enclosing chunk_view.

1) Equivalent to:
return ranges::min(i.parent_->remainder_,
ranges::end(i.parent_->base_) - *i.parent_->current_);
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::inner-iterator is an associated class of the arguments.

Parameters

i - the iterator
s - the sentinel

Return value

The distance between given iterator and sentinel.

Example

See also

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

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