# operator==(std::ranges::take_view::sentinel<Const>)

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< cpp‎ | ranges‎ | take view‎ | sentinel

friend constexpr bool operator==( const std::counted_iterator<ranges::iterator_t<Base>>& y, const /*sentinel*/& x ); | (1) | (since C++20)
template< bool OtherC = !Const > requires std::sentinel_for<ranges::sentinel_t<Base>, ranges::iterator_t</*add-const-if*/<OtherC, V>>> friend constexpr bool operator==( const std::counted_iterator<ranges::iterator_t< /*add-const-if*/<OtherC, V>>>& y, const /*sentinel*/& x ); | (2) | (since C++20)

Compares a take_view::/*sentinel*/ with a std::counted_iterator (typically obtained from a call to `take_view::begin`).

Returns true if `y` points past the N-th element (where N is the number passed to the constructor of `take_view`), or if end of underlying view is reached.

The exposition-only alias template `add-const-if` is defined as template<bool C, class T> using /*add-const-if*/ = std::conditional_t<C, const T, T>;.

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

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

### Parameters

y | - | std::counted_iterator to compare
x | - | sentinel to compare

### Return value

y.count() == 0 || y.base() == x.end_, where `end_` denotes the underlying sentinel.

### Example

| This section is incomplete Reason: no example

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 3449 | C++20 | comparison between the iterator and the sentinel of differently const-qualified `take_view` was unsupported | made supported when possible

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