rx-pairwise.hpp File Reference

Take values pairwise from this observable. More...

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

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Classes
struct	rxcpp::member_overload< pairwise_tag >

Namespaces
	rxcpp
	rxcpp::operators

Macros
#define	RXCPP_OPERATORS_RX_PAIRWISE_HPP

Functions
template<class... AN>
auto	rxcpp::operators::pairwise (AN &&...an) -> operator_factory< pairwise_tag, AN... >
	Take values pairwise from this observable. More...

Detailed Description

Take values pairwise from this observable.

Returns

Observable that emits tuples of two the most recent items emitted by the source observable.

Sample Code

    auto values = rxcpp::observable<>::range(1, 5).pairwise();
    values.
        subscribe(
            [](std::tuple<int, int> v){printf("OnNext: %d, %d\n", std::get<0>(v), std::get<1>(v));},
            [](){printf("OnCompleted\n");});

OnNext: 1, 2
OnNext: 2, 3
OnNext: 3, 4
OnNext: 4, 5
OnCompleted

If the source observable emits less than two items, no pairs are emitted by the source observable:

    auto values = rxcpp::observable<>::just(1).pairwise();
    values.
        subscribe(
            [](std::tuple<int, int> v){printf("OnNext: %d, %d\n", std::get<0>(v), std::get<1>(v));},
            [](){printf("OnCompleted\n");});

OnCompleted

Macro Definition Documentation

#define RXCPP_OPERATORS_RX_PAIRWISE_HPP