init

Telegram/lib_rpl/rpl/deferred.h

@@ -0,0 +1,25 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include <rpl/producer.h>
+
+namespace rpl {
+
+template <
+	typename Creator,
+	typename Value = typename decltype(std::declval<Creator>()())::value_type,
+	typename Error = typename decltype(std::declval<Creator>()())::error_type>
+inline auto deferred(Creator &&creator) {
+	return make_producer<Value, Error>([
+		creator = std::forward<Creator>(creator)
+	](const auto &consumer) mutable {
+		return std::move(creator)().start_existing(consumer);
+	});
+}
+
+} // namespace rpl