Difference between revisions of "cpp/ranges/chunk view/outer iterator/operator-"
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< cpp | ranges | chunk view | outer iterator
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| − | {{title|operator-{{ | + | {{title|operator-{{|(ranges::chunk_view::''outer-iterator'')}}}} |
{{cpp/ranges/chunk_view/navbar}} | {{cpp/ranges/chunk_view/navbar}} | ||
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@2@ Equivalent to: {{c|1=return -(s - i);}}. | @2@ Equivalent to: {{c|1=return -(s - i);}}. | ||
| − | {{cpp/hidden friend|std::ranges::chunk_view::''outer-iterator''|plural=yes}} | + | {{cpp/hidden friend|std::ranges::chunk_view::''outer-iterator''|plural=yes}} |
===Parameters=== | ===Parameters=== | ||
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===Return value=== | ===Return value=== | ||
| − | + | distance between given iterator and sentinel. | |
===Example=== | ===Example=== | ||
Latest revision as of 22:16, 20 June 2024
| friend constexpr difference_type operator-( std::default_sentinel_t s, const /*outer-iterator*/& i ) |
(1) | (since C++23) |
| friend constexpr difference_type operator-( const /*outer-iterator*/& i, std::default_sentinel_t s ) |
(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 is an associated class of the arguments.
Contents |
[edit] Parameters
| i | - | the iterator |
| s | - | the sentinel |
[edit] Return value
The distance between given iterator and sentinel.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C++23) |
increments the iterator (public member function) |
