std::ranges::chunk_by_view<V,Pred>::pred

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< cpp‎ | ranges‎ | chunk by view
C++
Ranges library
Range adaptors
std::ranges::chunk_by_view
constexpr const Pred& pred( ) const ;
(since C++23)

Returns a reference to the contained Pred object. Equivalent to return * pred_ ;

The behavior is undefined if pred_ does not contain a value.

Parameters

(none)

Return value

A reference to the contained Pred object.

Example

Run this code
#include <cassert>
#include <concepts>
#include <functional>
#include <initializer_list>
#include <ranges>
 
int main()
{
    const auto v = {1, 1, 2, 2, 1, 1, 1};
    auto chunks = v | std::views::chunk_by(std::equal_to{});
    auto pred = chunks.pred();
    static_assert(std::same_as<decltype(pred), std::equal_to<>>);
    assert(pred(v.begin()[0], 1));
}
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