xtd::ranges::views::where_view Class Reference

Definition

The xtd::ranges::views::where_view class is used to filter elements from a sequence.

Definition

class where_view;

Header

#include <xtd/ranges/views/where_view>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::where instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", numbers | where([](auto n) {return n <= 5;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5]

The following example shows how to use xtd::ranges::views::where_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", where(numbers, [](auto n) {return n <= 5;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5]

Public Operators
template<std::ranges::range range_t, typename predicate_t>
auto	operator() (range_t &&source, const predicate_t &predicate) const
	Filters a sequence of values based on a predicate.
template<typename predicate_t>
auto	operator() (const predicate_t &predicate) const
	Filters a sequence of values based on a predicate.

Member Function Documentation

operator()() [1/2]

template<std::ranges::range range_t, typename predicate_t>

auto xtd::ranges::views::where_view::operator() ( range_t && source, const predicate_t & predicate ) const

inline

Filters a sequence of values based on a predicate.

Template Parameters

range_t

The type of the elements of source.

Parameters

source	A sequence of values to filter.
predicate	A function to test each element for a condition.

operator()() [2/2]

template<typename predicate_t>

auto xtd::ranges::views::where_view::operator() ( const predicate_t & predicate ) const

inline

Filters a sequence of values based on a predicate.

Template Parameters

range_t

The type of the elements of source.

Parameters

predicate

A function to test each element for a condition.

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

• xtd.core/include/xtd/ranges/views/where_view.hpp