compat/chrono_literals: Add C++14 backport.cpp

Add user-defined literals for duration types (like the ones from C++14),
Because these are user-defined they start with an underscore.

3 files changed, 87 insertions, 4 deletions

diff --git a/src/menu/mouse_event.cpp b/src/menu/mouse_event.cpp
index 3f4104a0..ddcc00f2 100644
--- a/src/menu/mouse_event.cpp
+++ b/src/menu/mouse_event.cpp
@@ -25,6 +25,7 @@
 #include <cstddef>
 
 #include "mouse_event.hpp"
+#include "utils/compat/chrono_literals.hpp"
 
 namespace usdx
 {
@@ -48,17 +49,17 @@ namespace usdx
 		{
 			if (direction == UP) {
 				if (this->direction == DOWN) {
-					if (time.since(std::chrono::milliseconds{5000}))
+					if (time.since(5000_ms))
 						return CLICK;
 				}
 				else if (this->direction == CLICK) {
-					if (time.since(std::chrono::milliseconds{5000}))
+					if (time.since(5000_ms))
 						return DBL_CLICK;
 				}
 			}
 			else if (direction == DOWN) {
 				if (this->direction == CLICK &&
-					time.since(std::chrono::milliseconds{5000}))
+					time.since(5000_ms))
 					return CLICK;
 			}
 		}
diff --git a/src/menu/software_mouse_pointer.cpp b/src/menu/software_mouse_pointer.cpp
index 2708917c..fd102fa8 100644
--- a/src/menu/software_mouse_pointer.cpp
+++ b/src/menu/software_mouse_pointer.cpp
@@ -28,13 +28,14 @@
 
 #include "software_mouse_pointer.hpp"
 #include "utils/activator.hpp"
+#include "utils/compat/chrono_literals.hpp"
 
 namespace usdx
 {
 	SoftwareMousePointer::SoftwareMousePointer(Container* parent, EventManager* event_manager)
 		: DrawableControl(parent), color(255,255,255,100), down(false)
 	{
-		fade_inactive = new Timer(this, std::chrono::seconds{2}, true);
+		fade_inactive = new Timer(this, 2_s, true);
 
 		this->vertices[0] = 0.0f;
 		this->vertices[1] = 40.0f;
diff --git a/src/utils/compat/chrono_literals.hpp b/src/utils/compat/chrono_literals.hpp
new file mode 100644
index 00000000..7bd28e22
--- /dev/null
+++ b/src/utils/compat/chrono_literals.hpp
@@ -0,0 +1,81 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef CHRONO_LITERALS_HPP
+#define CHRONO_LITERALS_HPP
+
+#include <chrono>
+
+namespace usdx
+{
+	constexpr std::chrono::milliseconds
+	operator "" _ms (unsigned long long arg)
+	{
+		return std::chrono::milliseconds {arg};
+	}
+
+	constexpr std::chrono::duration<long double, std::milli>
+	operator "" _ms (long double arg)
+	{
+		return std::chrono::duration<long double, std::milli>(arg);
+	}
+
+	constexpr std::chrono::seconds
+	operator "" _s (unsigned long long arg)
+	{
+		return std::chrono::seconds {arg};
+	}
+
+	constexpr std::chrono::duration<long double>
+	operator "" _s (long double arg)
+	{
+		return std::chrono::duration<long double>(arg);
+	}
+
+	constexpr std::chrono::minutes
+	operator "" _min (unsigned long long arg)
+	{
+		return std::chrono::minutes {arg};
+	}
+
+	constexpr std::chrono::duration<long double, std::ratio<60,1>>
+	operator "" _min (long double arg)
+	{
+		return std::chrono::duration<long double, std::ratio<60,1>>(arg);
+	}
+
+	constexpr std::chrono::hours
+	operator "" _h (unsigned long long arg)
+	{
+		return std::chrono::hours {arg};
+	}
+
+	constexpr std::chrono::duration<long double, std::ratio<3600,1>>
+	operator "" _h (long double arg)
+	{
+		return std::chrono::duration<long double, std::ratio<3600,1>>(arg);
+	}
+}
+
+#endif