operator==,<,>,<=,>=,<=>(ranges::concat_view::iterator)
friend constexpr bool operator==
( const /*iterator*/& x, std::default_sentinel_t );
| (1) | (since C++26) |
friend constexpr bool operator==
( const /*iterator*/& x, const /*iterator*/& y )
requires (std::equality_comparable<ranges::iterator_t<
std::conditional_t<Const, const Views, Views>>> && ...);
| (2) | (since C++26) |
friend constexpr bool operator<
( const /*iterator*/& x, const /*iterator*/& y )
requires /*all-random-access*/<Const, Views...>;
| (3) | (since C++26) |
friend constexpr bool operator>
( const /*iterator*/& x, const /*iterator*/& y )
requires /*all-random-access*/<Const, Views...>;
| (4) | (since C++26) |
friend constexpr bool operator<=
( const /*iterator*/& x, const /*iterator*/& y )
requires /*all-random-access*/<Const, Views...>;
| (5) | (since C++26) |
friend constexpr bool operator>=
( const /*iterator*/& x, const /*iterator*/& y )
requires /*all-random-access*/<Const, Views...>;
| (6) | (since C++26) |
friend constexpr auto operator<=>
( const /*iterator*/& x, const /*iterator*/& y )
requires (/*all-random-access*/<Const, Views...> &&
(std::three_way_comparable<ranges::iterator_t<
std::conditional_t<Const, const Views, Views>>> && ...));
| (7) | (since C++26) |
Compares the iterator with another iterator or a sentinel.
1) Compares an iterator with a sentinel.
If
x.it_ .valueless_by_exception() is true, the behavior is undefined.
If
x.it_ .valueless_by_exception()||y.it_ .valueless_by_exception() is true, the behavior is undefined.These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::ranges::concat_view::iterator <Const> is an associated class of the arguments.
Parameters
| x, y | - | iterators to compare |
Return value
1)
x.it_ .index()==(sizeof...(Views)-1)&&
x.get-iter <sizeof...(Views)-1>()==x.get-end <sizeof...(Views)-1>()
Example
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https://en.cppreference.com/cpp/ranges/concat_view/iterator/operator_cmp
