Add a mock project for experimental research

test/CMakeLists.txt

@@ -1,3 +1,4 @@
 add_subdirectory(playground)
 add_subdirectory(threads)
 add_subdirectory(unit-test)
+add_subdirectory(mock)

test/mock/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_executable(test-mock
+  ${CMAKE_CURRENT_LIST_DIR}/test-mock.cpp)
+
+target_link_libraries(test-mock
+  PRIVATE
+    continuable)
+
+add_test(NAME continuable-mock-tests
+  COMMAND test-mock)

test/mock/test-mock.cpp

@@ -0,0 +1,67 @@
+/**
+  Copyright(c) 2015 - 2017 Denis Blank <denis.blank at outlook dot com>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files(the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions :
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+**/
+
+#include <string>
+#include <functional>
+
+struct continuable_base {
+  template <typename T> continuable_base& then(T&&) { return *this; }
+
+  template <typename T> continuable_base& dropped(T&&) { return *this; }
+
+  template <typename T> continuable_base& thrown(T&&) { return *this; }
+
+  template <typename T> continuable_base& failed(T&&) { return *this; }
+};
+
+template<typename... Result>
+struct accumulator {
+  auto accumulate() { return [] {}; }
+};
+
+template <typename Accumulator, typename... Initial>
+auto make_accumulator(Accumulator&& /*ac*/, Initial&&... /*initial*/) {
+  return std::make_tuple(continuable_base{}, accumulator<int>{});
+}
+
+continuable_base http_request(std::string) { return {}; }
+
+int main(int, char**) {
+  auto accumulator = make_accumulator(std::plus<int>{}, 0);
+
+  http_request("github.com")
+      .then([](std::string response) {
+        // ...
+        (void)response;
+      })
+      .then(std::get<1>(accumulator).accumulate())
+      .thrown([](std::exception_ptr exception) {
+        // ...
+        (void)exception;
+      })
+      .failed([](std::error_code code) {
+        // ...
+        (void)code;
+      });
+
+  return 0;
+}