# operator==,<,>,<=,>=,<=>(ranges::transform_view::iterator)

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< cpp‎ | ranges‎ | transform view‎ | iterator

friend constexpr bool operator==( const /*iterator*/& x, const /*iterator*/& y ) requires std::equality_comparable<ranges::iterator_t<Base>>; | (1) | (since C++20)
friend constexpr bool operator<( const /*iterator*/& x, const /*iterator*/& y ) requires ranges::random_access_range<Base>; | (2) | (since C++20)
friend constexpr bool operator>( const /*iterator*/& x, const /*iterator*/& y ) requires ranges::random_access_range<Base>; | (3) | (since C++20)
friend constexpr bool operator<=( const /*iterator*/& x, const /*iterator*/& y ) requires ranges::random_access_range<Base>; | (4) | (since C++20)
friend constexpr bool operator>=( const /*iterator*/& x, const /*iterator*/& y ) requires ranges::random_access_range<Base>; | (5) | (since C++20)
friend constexpr auto operator<=>( const /*iterator*/& x, const /*iterator*/& y ) requires ranges::random_access_range<Base> && std::three_way_comparable<ranges::iterator_t<Base>>; | (6) | (since C++20)

Compares the underlying iterators.

1) Equivalent to return x.current_ == y.current_;, where `current_` is the underlying iterator.
2) Equivalent to return x.current_ < y.current_;, where `current_` is the underlying iterator.
3) Equivalent to return y < x;
4) Equivalent to return !(y < x);
5) Equivalent to return !(x < y);
6) Equivalent to return x.current_ <=> y.current_;, where `current_` is the underlying iterator.

These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when `std::ranges::transform_view::iterator<Const>` is an associated class of the arguments.

The `!=` operator is synthesized from `operator==`.

### Parameters

x, y | - | iterators to compare

### Return value

result of comparison

### See also

operator== (C++20) | compares a sentinel with an iterator returned from `transform_view::begin` (function)

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