[Orxonox-commit 700] r3232 - trunk/src/util

[rgrieder at orxonox.net]

Author: rgrieder
Date: 2009-06-26 11:41:11 +0200 (Fri, 26 Jun 2009)
New Revision: 3232

Added:
   trunk/src/util/TemplateUtils.h
Modified:
   trunk/src/util/Convert.h
Log:
Moved implicit conversion detection from Convert.h to the new TemplateUtils.h file.

Modified: trunk/src/util/Convert.h
===================================================================
--- trunk/src/util/Convert.h	2009-06-23 19:59:04 UTC (rev 3231)
+++ trunk/src/util/Convert.h	2009-06-26 09:41:11 UTC (rev 3232)
@@ -43,53 +43,8 @@
 
 #include "Debug.h"
 #include "String.h"
+#include "TemplateUtils.h"
 
-// GCC generates warnings when implicitely casting from float to int for instance.
-// This is however exactly what convertValue does, so we need to suppress these warnings.
-// They only occur when using the ImplicitConversion template.
-#ifdef ORXONOX_COMPILER_GCC
-#  pragma GCC system_header
-#endif
-
-
-///////////////////////////////////////////////
-// Static detection for conversion functions //
-///////////////////////////////////////////////
-
-/* The idea to use the sizeof() operator on return functions to determine function existance
-   is described in 'Modern C++ design' by Alexandrescu (2001). */
-
-// disable warnings about possible loss of data
-#ifdef ORXONOX_COMPILER_MSVC
-#  pragma warning(push)
-#  pragma warning(disable:4244)
-#endif
-
-namespace orxonox
-{
-    template <class FromType, class ToType>
-    class ImplicitConversion
-    {
-    private:
-        ImplicitConversion(); ImplicitConversion(const ImplicitConversion&); ~ImplicitConversion();
-        // Gets chosen only if there is an implicit conversion from FromType to ToType.
-        static char test(ToType);
-        // Accepts any argument. Why do we not use a template? The reason is that with templates,
-        // the function above is only taken iff it is an exact type match. But since we want to
-        // check for implicit conversion, we have to use the ellipsis.
-        static long long test(...);
-        static FromType object; // helper object to handle private c'tor and d'tor
-    public:
-        // test(object) only has 'long long' return type iff the compiler doesn't choose test(...)
-        enum { exists = (sizeof(test(object)) == sizeof(char)) };
-    };
-}
-
-#ifdef ORXONOX_COMPILER_MSVC
-#  pragma warning(pop)
-#endif
-
-
 ////////////////////////////////////
 //// ACTUAL CONVERSION SEQUENCE ////
 ////////////////////////////////////

Added: trunk/src/util/TemplateUtils.h
===================================================================
--- trunk/src/util/TemplateUtils.h	                        (rev 0)
+++ trunk/src/util/TemplateUtils.h	2009-06-26 09:41:11 UTC (rev 3232)
@@ -0,0 +1,88 @@
+/*
+ *   ORXONOX - the hottest 3D action shooter ever to exist
+ *                    > www.orxonox.net <
+ *
+ *
+ *   License notice:
+ *
+ *   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; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ *   Author:
+ *      Reto Grieder
+ *   Co-authors:
+ *      ...
+ *
+ */
+
+/**
+    @file
+    @brief Declaration of various helper templates.
+*/
+
+#ifndef _TemplateUtils_H__
+#define _TemplateUtils_H__
+
+#include "UtilPrereqs.h"
+
+namespace orxonox
+{
+    ///////////////////////////////////////////////////
+    // Static detection of implicit type conversions //
+    ///////////////////////////////////////////////////
+
+// disable warnings about possible loss of data
+#ifdef ORXONOX_COMPILER_MSVC
+#  pragma warning(push)
+#  pragma warning(disable:4244)
+#endif
+// GCC generates warnings when implicitely casting from float to int for instance.
+#ifdef ORXONOX_COMPILER_GCC
+#  pragma GCC system_header
+#endif
+
+    /**
+    @brief
+        Detects whether you can implicitely cast FromType to ToType.
+
+        Usage: ImplicitConversion<FromType, ToType>::exists
+        This gives you a compile time constant boolean in the form of an enum value.
+    @note
+        The idea to use the sizeof() operator on return values to determine function existance
+        is described in 'Modern C++ design' by Alexandrescu (2001).
+    */
+    template <class FromType, class ToType>
+    class ImplicitConversion
+    {
+    private:
+        ImplicitConversion(); ImplicitConversion(const ImplicitConversion&); ~ImplicitConversion();
+        // Gets chosen only if there is an implicit conversion from FromType to ToType.
+        static char test(ToType);
+        // Accepts any argument. Why do we not use a template? The reason is that with templates,
+        // the function above is only taken iff it is an exact type match. But since we want to
+        // check for implicit conversion, we have to use the ellipsis.
+        static long long test(...);
+        static FromType object; // helper object to handle private c'tor and d'tor
+    public:
+        // test(object) only has 'long long' return type iff the compiler doesn't choose test(...)
+        enum { exists = (sizeof(test(object)) == sizeof(char)) };
+    };
+
+#ifdef ORXONOX_COMPILER_MSVC
+#  pragma warning(pop)
+#endif
+
+}
+
+#endif /* _TemplateUtils_H__ */


Property changes on: trunk/src/util/TemplateUtils.h
___________________________________________________________________
Added: svn:eol-style
   + native