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Telegram/lib_base/base/call_delayed.h

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+// 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
+
+namespace base {
+
+void call_delayed(crl::time delay, FnMut<void()> &&callable);
+
+template <
+	typename Guard,
+	typename Callable,
+	typename GuardTraits = crl::guard_traits<std::decay_t<Guard>>,
+	typename = std::enable_if_t<
+	sizeof(GuardTraits) != crl::details::dependent_zero<GuardTraits>>>
+inline void call_delayed(
+		crl::time delay,
+		Guard &&object,
+		Callable &&callable) {
+	return call_delayed(delay, crl::guard(
+		std::forward<Guard>(object),
+		std::forward<Callable>(callable)));
+}
+
+template <typename Guard, typename Callable>
+[[nodiscard]] inline auto fn_delayed(
+		crl::time delay,
+		Guard &&object,
+		Callable &&callable) {
+	auto guarded = crl::guard(
+		std::forward<Guard>(object),
+		std::forward<Callable>(callable));
+	return [saved = std::move(guarded), delay] {
+		auto copy = saved;
+		base::call_delayed(delay, std::move(copy));
+	};
+}
+
+} // namespace base