Range-v3
Range algorithms, views, and actions for the Standard Library
ranges::views::cache1_fn Struct Reference

Synopsis of methods

constexpr view< cache1_fncache1 {}
 

Public Member Functions

template<typename Rng >
constexpr auto operator() (Rng &&rng) const -> cache1_view< all_t< Rng >> requires viewable_range< Rng > &&input_range< Rng > &&constructible_from< range_value_t< Rng >, range_reference_t< Rng >>
 Caches the most recent element within the view so that dereferencing the view's iterator multiple times doesn't incur any recomputation. This can be useful in adaptor pipelines that include combinations of view::filter and view::transform, for instance. More...
 

Member Function Documentation

◆ operator()()

template<typename Rng >
constexpr auto ranges::views::cache1_fn::operator() ( Rng &&  rng) const -> cache1_view<all_t<Rng>> requires viewable_range<Rng> && input_range<Rng> && constructible_from<range_value_t<Rng>, range_reference_t<Rng>>
constexpr

Caches the most recent element within the view so that dereferencing the view's iterator multiple times doesn't incur any recomputation. This can be useful in adaptor pipelines that include combinations of view::filter and view::transform, for instance.

Note
views::cache1 is always single-pass.