cpp.react/examples/src/BasicObservers.cpp at master · TheKK/cpp.react · GitHub

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// Copyright Sebastian Jeckel 2017.

// Distributed under the Boost Software License, Version 1.0.

// (See accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

#include <iostream>

#include <string>

#include <utility>

#include "react/state.h"

#include "react/event.h"

#include "react/observer.h"

///////////////////////////////////////////////////////////////////////////////////////////////////

/// Example 1 - Creating subject-bound observers

///////////////////////////////////////////////////////////////////////////////////////////////////

namespace example1

{

using namespace std;

using namespace react;

Group group;

StateVar<int> x = StateVar<int>::Create(group, 1);

void Run()

{

cout << "Example 1 - Creating observers" << endl;

{

auto st = State<int>::Create([] (int x) { return x; }, x);

auto obs = Observer::Create([] (int v) { cout << v << endl; }, st);

x.Set(2); // output: 2

}

x.Set(3); // no ouput

cout << endl;

}

///////////////////////////////////////////////////////////////////////////////////////////////////

/// Run examples

///////////////////////////////////////////////////////////////////////////////////////////////////

int main()

{

example1::Run();

return 0;

}

cpp.react/examples/src/BasicObservers.cpp at master · TheKK/cpp.react · GitHub

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