Diff: GetTypeName.h

Revision:

0:9723189e1955

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GetTypeName.h	Sun Feb 15 21:00:05 2015 +0000
@@ -0,0 +1,109 @@
+/* GetTypeName.h */
+/* Copyright (C) 2015 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#ifndef TYPE_NAME_H_
+#define TYPE_NAME_H_
+
+#define DECLARE_TYPE_NAME(x) template<> const char *type_name<x>::name = #x;
+#define GetTypeName(x) (type_name<typeof(x)>::name)
+
+namespace mbed {
+/** <H1>Get a variable type using type traits - a replacement for RTTI typeid().</H1>
+* 
+* Sources:<BR>
+*
+* https://developer.mbed.org/forum/bugs-suggestions/topic/4494/?page=1#comment-22386<BR>
+* http://stackoverflow.com/questions/81870/print-variable-type-in-c<BR>
+* <BR>
+* In RTTI, we were able to use something like.
+* @code
+* // Depending on the compiler used, this returns 'int', 'i', ....
+*     int main() {
+*         int a= 4;
+*         printf("%s", typeid(a).name());
+*     }
+* @endcode
+* To reduce the code overhead, this can no longer be used in the mbed compiler, however, we can replace this with type traits.<BR>
+* <BR>
+* Example:<BR>
+* @code
+* #include "mbed.h"
+* #include "GetTypeName.h"
+*
+* int main()
+* {
+*     char a = 65;
+*     printf("Type name for <char> '%c' is %s\r\n", a, GetTypeName(a));
+*     // Check whether GetTypeName is of 'char' type.
+*     // Note that strcmp returns 0 when both strings are equal.
+*     if(!strcmp(GetTypeName(a),"char")) printf("'%c' is of 'char' type\r\n", a);
+* }
+* @endcode
+* <BR>
+* The DECLARE_TYPE_NAME define exists to make your life easier in declaring this traits class for all the types you expect to need.<BR>
+* This might be more useful than the solutions involving typeid because you get to control the output.<BR>
+* <BR>
+* Supported declarations
+* @verbatim
+* | Variable           | Returns    |
+* |--------------------|------------|
+* | char               | char       |
+* | uint8_t            | uint8_t    |
+* | signed char        | int8_t     |
+* | int8_t             | int8_t     |
+* | unsigned short     | uint16_t   |
+* | uint16_t           | uint16_t   |
+* | short              | int16_t    |
+* | int16_t            | int16_t    |
+* | unsigned int       | uint32_t   |
+* | uint32_t           | uint32_t   |
+* | int                | int32_t    |
+* | int32_t            | int32_t    |
+* | unsigned long long | uint64_t   |
+* | uint64_t           | uint64_t   |
+* | long long          | int64_t    |
+* | int64_t            | int64_t    |
+* | float              | float      |
+* | double             | double     |
+* | bool               | bool       |
+* @endverbatim
+*/
+
+    template <typename T> class type_name
+    {
+    public:
+        static const char *name;
+    };
+
+    DECLARE_TYPE_NAME(char);
+    DECLARE_TYPE_NAME(uint8_t);
+    DECLARE_TYPE_NAME(int8_t);      // also valid for 'signed char'
+    DECLARE_TYPE_NAME(uint16_t);    // also valid for 'unsigned short'
+    DECLARE_TYPE_NAME(int16_t);     // also valid for 'short'
+    DECLARE_TYPE_NAME(uint32_t);    // also valid for 'unsigned int'
+    DECLARE_TYPE_NAME(int32_t);     // also valid for 'int'
+    DECLARE_TYPE_NAME(uint64_t);    // also valid for 'unsigned long long'
+    DECLARE_TYPE_NAME(int64_t);     // also valid for 'long long
+    DECLARE_TYPE_NAME(float);
+    DECLARE_TYPE_NAME(double);
+    DECLARE_TYPE_NAME(bool);
+
+} // namespace mbed
+
+#endif //TYPE_NAME_H_
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