Start to implement the unit tests for loop and add range_loop

include/continuable/detail/operations/loop.hpp

@@ -37,9 +37,14 @@
 #include <type_traits>
 #include <continuable/continuable-base.hpp>
 #include <continuable/continuable-result.hpp>
+#include <continuable/detail/features.hpp>
 #include <continuable/detail/utility/traits.hpp>
 #include <continuable/detail/utility/util.hpp>
 
+#if defined(CONTINUABLE_HAS_EXCEPTIONS)
+#include <exception>
+#endif // CONTINUABLE_HAS_EXCEPTIONS
+
 namespace cti {
 namespace detail {
 template <typename T>
@@ -74,24 +79,52 @@ class loop_frame : public std::enable_shared_from_this<
   ArgsTuple args_;
 
 public:
+  explicit loop_frame(Promise promise, Callable callable, ArgsTuple args)
+      : promise_(std::move(promise)), callable_(std::move(callable)),
+        args_(std::move(args)) {
+  }
+
   void loop() {
+    // MSVC can't evaluate this inside the lambda capture
+    auto me = this->shared_from_this();
+
     traits::unpack(
-        [&callable_](auto&&... args) {
-          util::invoke(callable_, std::forward<decltype(args)>(args)...)
-              .then([me = this->shared_from_this()](auto&& result) {
-                if (result.is_empty()) {
-                  me->loop();
-                } else if (result.is_value()) {
-                  traits::unpack(std::move(promise_), result);
-                } else {
-                  assert(result.is_exception());
-                  traits::unpack(std::move(promise_), exception_arg_t{},
-                                 result.get_exception());
-                }
-              });
+        [&](auto&&... args) mutable {
+
+#if defined(CONTINUABLE_HAS_EXCEPTIONS)
+          try {
+#endif // CONTINUABLE_HAS_EXCEPTIONS
+
+            util::invoke(callable_, std::forward<decltype(args)>(args)...)
+                .next([me = std::move(me)](auto&&... args) {
+                  me->resolve(std::forward<decltype(args)>(args)...);
+                });
+
+#if defined(CONTINUABLE_HAS_EXCEPTIONS)
+          } catch (...) {
+            resolve(exception_arg_t{}, std::current_exception());
+          }
+#endif // CONTINUABLE_HAS_EXCEPTIONS
         },
         args_);
   }
+
+  template <typename Result>
+  void resolve(Result&& result) {
+    if (result.is_empty()) {
+      loop();
+    } else if (result.is_value()) {
+      traits::unpack(std::move(promise_), std::forward<Result>(result));
+    } else {
+      assert(result.is_exception());
+      std::move(promise_).set_exception(
+          std::forward<Result>(result).get_exception());
+    }
+  }
+
+  void resolve(exception_arg_t, exception_t exception) {
+    promise_.set_exception(std::move(exception));
+  }
 };
 
 template <typename Promise, typename Callable, typename ArgsTuple>
@@ -115,10 +148,27 @@ auto loop(Callable&& callable, Args&&... args) {
                         args = std::make_tuple(std::forward<decltype(args)>(
                             args)...)](auto&& promise) mutable {
     // Do the actual looping
-    auto frame = make_loop_frame(std::forward<decltype(promise)>(promise));
+    auto frame = make_loop_frame(std::forward<decltype(promise)>(promise),
+                                 std::move(callable), std::move(args));
     frame->loop();
   });
 }
+
+template <typename Callable, typename Begin>
+auto make_range_looper(Callable&& callable, Begin&& begin) {
+  return [callable = std::forward<Callable>(callable),
+          begin = std::forward<Begin>(begin)](auto&& end) mutable {
+    return util::invoke(callable, begin)
+        .then([&begin, // begin stays valid over the `then`.
+               end = std::forward<decltype(end)>(end)]() mutable -> result<> {
+          if (++begin != end) {
+            return empty_result{};
+          } else {
+            return make_result();
+          }
+        });
+  };
+}
 } // namespace operations
 } // namespace detail
 } // namespace cti

include/continuable/operations/loop.hpp

@@ -37,12 +37,18 @@
 namespace cti {
 /// \ingroup Operations
 /// \{
-
 template <typename Callable, typename... Args>
 auto loop(Callable&& callable, Args&&... args) {
   return detail::operations::loop(std::forward<Callable>(callable),
                                   std::forward<Args>(args)...);
 }
+
+template <typename Callable, typename Iterator>
+auto range_loop(Callable&& callable, Iterator begin, Iterator end) {
+  auto looper = detail::operations::make_range_looper(
+      std::forward<Callable>(callable), begin);
+  return detail::operations::loop(std::move(looper), end);
+}
 /// \}
 } // namespace cti
 

test/unit-test/CMakeLists.txt

@@ -56,6 +56,8 @@ set(TEST_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-connection-all.cpp
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-connection-any.cpp
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-connection-seq.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-operations-async.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-operations-loop.cpp
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-erasure.cpp
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-regression.cpp
     ${CMAKE_CURRENT_LIST_DIR}/multi/test-continuable-transforms.cpp)

test/unit-test/multi/test-continuable-operations-async.cpp

@@ -0,0 +1,28 @@
+
+/*
+  Copyright(c) 2015 - 2019 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 <test-continuable.hpp>
+
+TYPED_TEST(single_dimension_tests, operations_async_) {
+
+}

test/unit-test/multi/test-continuable-operations-loop.cpp

@@ -0,0 +1,67 @@
+
+/*
+  Copyright(c) 2015 - 2019 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 <test-continuable.hpp>
+
+using namespace cti;
+
+static int const CANARY = 39472;
+
+TYPED_TEST(single_dimension_tests, operations_loop_completion) {
+  ASSERT_ASYNC_COMPLETION(loop([] {
+    //
+    return make_ready_continuable(make_result());
+  }));
+
+  ASSERT_ASYNC_RESULT(loop(
+                          [](auto&&... args) {
+                            //
+                            return make_ready_continuable(make_result(
+                                std::forward<decltype(args)>(args)...));
+                          },
+                          CANARY),
+                      CANARY);
+
+  ASSERT_ASYNC_RESULT(loop(
+                          [](auto&&... args) {
+                            //
+                            return make_ready_continuable(make_result(
+                                std::forward<decltype(args)>(args)...));
+                          },
+                          CANARY, 2, CANARY),
+                      CANARY, 2, CANARY);
+}
+
+TYPED_TEST(single_dimension_tests, operations_loop_looping) {
+  int i = 0;
+
+  ASSERT_ASYNC_COMPLETION(range_loop(
+      [&](int current) {
+        EXPECT_EQ(current, i);
+        ++i;
+        return make_ready_continuable();
+      },
+      0, 10));
+
+  ASSERT_EQ(i, 10);
+}