# operator==(ranges::take_while_view::sentinel)

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< cpp‎ | ranges‎ | take while view‎ | sentinel

friend constexpr bool operator==( const ranges::iterator_t<Base>& x, const /*sentinel*/& y ); |  | (since C++20)

Compares a take_while_view::/*sentinel*/ with an iterator into (possibly const-qualified) view `V`. The iterator is typically obtained from a call to `take_while_view::begin`.

Returns true if `x` compares equal to the underlying sentinel of `y` (i.e. `y.base()`), or if the predicate returns false when applied to *x.

This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when `take_while_view::sentinel<Const>` is an associated class of the arguments.

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

### Parameters

x | - | iterator to compare
y | - | sentinel to compare

### Return value

y.end_ == x || !std::invoke(*y.pred_, *x), where `end_` denotes the stored sentinel and `pred_` denotes the stored pointer to predicate.

### Example

| This section is incomplete Reason: no example

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