ranges::views::filter_fn Struct Reference

#include <filter.hpp>

Inheritance diagram for ranges::views::filter_fn:

Public Member Functions
template<typename Pred>
constexpr auto	operator() (Pred pred) const
	template (typename Pred, typename Proj)() const expr auto operator()(Pred pred
projected< iterator_t< Rng >, Proj > constexpr filter_view< all_t< Rng >, composed< Pred, Proj > >	operator() (Rng &&rng, Pred pred, Proj proj) const
iterator_t< Rng > constexpr filter_view< all_t< Rng >, Pred >	operator() (Rng &&rng, Pred pred) const
Public Member Functions inherited from ranges::views::filter_base_fn
	template (typename Rng, typename Pred, typename Proj)(AND input_range< Rng > AND indirect_unary_predicate< Pred
projected< iterator_t< Rng >, Proj > constexpr filter_view< all_t< Rng >, composed< Pred, Proj > >	operator() (Rng &&rng, Pred pred, Proj proj) const
iterator_t< Rng > constexpr filter_view< all_t< Rng >, Pred >	operator() (Rng &&rng, Pred pred) const
Public Member Functions inherited from ranges::views::cpp20_filter_base_fn
	template (typename Rng, typename Pred)(AND input_range< Rng > AND indirect_unary_predicate< Pred
iterator_t< Rng > constexpr filter_view< all_t< Rng >, Pred >	operator() (Rng &&rng, Pred pred) const

Public Attributes
Proj proj	const

Detailed Description

ranges::views::filter

The filter view takes in a predicate function T -> bool and converts an input range of T into an output range of T by keeping all elements for which the predicate returns true.

Example

Output

Syntax

auto output_range = input_range | ranges::views::filter(filter_func);

Parameters

filter_func

• Called once for each element of the input range
• Returns true for elements that should present in the output range

input_range

• The range of elements to filter
• Reference type: T

output_range

• The range of filtered values
  • Is either a forward_range or the concept satisfied by the input
  • Is a common_range if the input is a common_range
  • Is not a sized_range or borrowed_range
• Reference type: T

Member Data Documentation

const

Proj proj ranges::views::filter_fn::const

Initial value:

{
                return make_view_closure(
                    bind_back(filter_base_fn{}, std::move(pred), std::move(proj)))

---

The documentation for this struct was generated from the following file:

• 3rd_party/range-v3/range/v3/view/filter.hpp