P0876R7

example/ontop.cpp

@@ -0,0 +1,41 @@
+
+//          Copyright Oliver Kowalke 2016.
+// 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 <cstdlib>
+#include <iostream>
+#include <tuple>
+
+#include <boost/context/fiber_context.hpp>
+
+namespace ctx = boost::context;
+
+int main() {
+    int data = 0;
+    ctx::fiber_context f{ [&data](ctx::fiber_context && f) {
+                        std::cout << "f1: entered first time: " << data  << std::endl;
+                        data += 1;
+                        f = std::move( f).resume();
+                        std::cout << "f1: entered second time: " << data  << std::endl;
+                        data += 1;
+                        f = std::move( f).resume();
+                        std::cout << "f1: entered third time: " << data << std::endl;
+                        return std::move( f);
+                    }};
+    f = std::move( f).resume();
+    std::cout << "f1: returned first time: " << data << std::endl;
+    data += 1;
+    f = std::move( f).resume();
+    std::cout << "f1: returned second time: " << data << std::endl;
+    data += 1;
+    f = std::move( f).resume_with([&data](ctx::fiber_context && f){
+        std::cout << "f2: entered: " << data << std::endl;
+        data = -1;
+        return std::move( f);
+    });
+    std::cout << "f1: returned third time" << std::endl;
+    std::cout << "main: done" << std::endl;
+    return EXIT_SUCCESS;
+}