Add example for boost.fiber

examples/Boost-fiber/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright (c) 2013, Ruslan Baratov
+# All rights reserved.
+
+cmake_minimum_required(VERSION 3.0)
+
+# Emulate HunterGate:
+# * https://github.com/hunter-packages/gate
+include("../common.cmake")
+
+project(download-boost)
+
+hunter_add_package(Boost COMPONENTS context fiber)
+find_package(Boost CONFIG REQUIRED context fiber)
+
+add_executable(foo foo.cpp)
+target_link_libraries(foo PUBLIC Boost::context Boost::fiber)

examples/Boost-fiber/foo.cpp

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+#include <boost/fiber/fiber.hpp>
+#include <boost/fiber/future.hpp>
+#include <boost/fiber/future/packaged_task.hpp>
+
+
+int calculate_the_answer_to_life_the_universe_and_everything()
+{
+    return 42;
+}
+
+int main() {
+    boost::fibers::packaged_task<int()> pt(calculate_the_answer_to_life_the_universe_and_everything);
+    boost::fibers::future<int> fi=pt.get_future();
+
+    boost::fibers::fiber task(boost::move(pt)); // launch task on a thread
+
+    fi.wait(); // wait for it to finish
+
+    assert(fi.valid());
+    assert(!fi.get_exception_ptr());
+    assert(fi.get()==42);
+}