Fix the range_loop build

include/continuable/detail/core/annotation.hpp

@@ -55,9 +55,9 @@ namespace hints {
 ///
 /// This is the overload taking an arbitrary amount of args
 template <typename... HintArgs>
-struct from_args : std::common_type<identity<HintArgs...>> {};
+struct from_args : std::common_type<signature_arg_t<HintArgs...>> {};
 template <>
-struct from_args<void> : std::common_type<identity<>> {};
+struct from_args<void> : std::common_type<signature_arg_t<>> {};
 } // namespace hints
 } // namespace detail
 } // namespace cti

include/continuable/detail/operations/async.hpp

@@ -32,12 +32,31 @@
 #define CONTINUABLE_DETAIL_OPERATIONS_ASYNC_HPP_INCLUDED
 
 #include <continuable/continuable-base.hpp>
+#include <continuable/detail/core/annotation.hpp>
+#include <continuable/detail/core/base.hpp>
+#include <continuable/detail/utility/identity.hpp>
 
 namespace cti {
 namespace detail {
 namespace operations {
+template <typename... SignatureArgs, typename Callable, typename... Args>
+auto make_async(signature_arg_t<SignatureArgs...>, Callable&& callable,
+                Args&&... args) {
+
+  auto continuation = [](auto&& promise) mutable { promise.set_value(); };
+
+  return base::attorney::create_from(std::move(continuation), //
+                                     signature_arg_t<Args...>{},
+                                     util::ownership{});
+}
+
 template <typename Callable, typename... Args>
 auto async(Callable&& callable, Args&&... args) {
+  using result_t = void;
+  using invoker_t =
+      decltype(base::decoration::invoker_of(identify<result_t>{}));
+  return make_async(invoker_t::hint(), std::forward<Callable>(callable),
+                    std::forward<Args>(args)...);
 }
 } // namespace operations
 

include/continuable/detail/operations/loop.hpp

@@ -154,17 +154,18 @@ auto loop(Callable&& callable, Args&&... args) {
   });
 }
 
-template <typename Callable, typename Begin>
-auto make_range_looper(Callable&& callable, Begin&& begin) {
+template <typename Callable, typename Begin, typename End>
+auto make_range_looper(Callable&& callable, Begin&& begin, End&& end) {
   return [callable = std::forward<Callable>(callable),
-          begin = std::forward<Begin>(begin)](auto&& end) mutable {
+          begin = std::forward<Begin>(begin),
+          end = std::forward<End>(end)]() mutable {
     return util::invoke(callable, begin)
-        .then([&begin, // begin stays valid over the `then`.
-               end = std::forward<decltype(end)>(end)]() mutable -> result<> {
+        .then([&begin, &end]() mutable -> std::tuple<result<>> {
+          // begin and end stays valid over the `then` here
           if (++begin != end) {
-            return empty_result{};
+            return std::make_tuple(result<>(empty_result{}));
           } else {
-            return make_result();
+            return std::make_tuple(make_result());
           }
         });
   };

include/continuable/operations/loop.hpp

@@ -32,6 +32,7 @@
 #define CONTINUABLE_OPERATIONS_LOOP_HPP_INCLUDED
 
 #include <utility>
+#include <continuable/continuable-result.hpp>
 #include <continuable/detail/operations/loop.hpp>
 
 namespace cti {
@@ -45,9 +46,9 @@ auto loop(Callable&& callable, 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);
+  return detail::operations::loop( //
+      detail::operations::make_range_looper(std::forward<Callable>(callable),
+                                            begin, end));
 }
 /// \}
 } // namespace cti