rx-any.hpp File Reference

Returns an Observable that emits true if any item emitted by the source Observable satisfies a specified condition, otherwise false. Emits false if the source Observable terminates without emitting any item. More...

#include "../rx-includes.hpp"

Include dependency graph for rx-any.hpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	rxcpp::member_overload< any_tag >
struct	rxcpp::member_overload< exists_tag >
struct	rxcpp::member_overload< contains_tag >

Namespaces
	rxcpp
	rxcpp::operators

Macros
#define	RXCPP_OPERATORS_RX_ANY_HPP

Functions
template<class... AN>
auto	rxcpp::operators::any (AN &&...an) -> operator_factory< any_tag, AN... >
	Returns an Observable that emits true if any item emitted by the source Observable satisfies a specified condition, otherwise false. Emits false if the source Observable terminates without emitting any item. More...
template<class... AN>
auto	rxcpp::operators::exists (AN &&...an) -> operator_factory< exists_tag, AN... >
	Returns an Observable that emits true if any item emitted by the source Observable satisfies a specified condition, otherwise false. Emits false if the source Observable terminates without emitting any item. More...
template<class... AN>
auto	rxcpp::operators::contains (AN &&...an) -> operator_factory< contains_tag, AN... >
	Returns an Observable that emits true if the source Observable emitted a specified item, otherwise false. Emits false if the source Observable terminates without emitting any item. More...

Detailed Description

Returns an Observable that emits true if any item emitted by the source Observable satisfies a specified condition, otherwise false. Emits false if the source Observable terminates without emitting any item.

Template Parameters

Predicate

the type of the test function.

Parameters

p	the test function to test items emitted by the source Observable.

Returns

An observable that emits true if any item emitted by the source observable satisfies a specified condition, otherwise false.

Some basic any- operators have already been implemented:

• rxcpp::operators::exists
• rxcpp::operators::contains

Sample Code

    auto values = rxcpp::observable<>::from(1, 2, 3, 4, 5).exists([](int n) { return n > 3; });
    values.
            subscribe(
            [](bool v) { printf("OnNext: %s\n", v ? "true" : "false"); },
            []() { printf("OnCompleted\n"); });

OnNext: true
OnCompleted

Sample Code

    auto values = rxcpp::observable<>::from(1, 2, 3, 4, 5).contains(3);
    values.
            subscribe(
            [](bool v) { printf("OnNext: %s\n", v ? "true" : "false"); },
            []() { printf("OnCompleted\n"); });

OnNext: true
OnCompleted

Macro Definition Documentation

#define RXCPP_OPERATORS_RX_ANY_HPP