| Navigation: Language Reference > 2 - Program Source Code Format > Procedure Overloading >====== Name Mangling and C++ Compatibility ====== |    |
Each overloaded function will have a link-time name composed of the procedure label and a “mangled” argument list (the NAME attribute can be used to disable name mangling). This is designed so that some degree of cross-calling between C++ and Clarion is possible. On the C++ side you need:
#pragma name(prefix⇒“”)
and the name in all caps. On the Clarion side you need a MODULE structure with a null string as its parameter:
MODULE()
END
The only procedures that can be cross-called are those whose prototypes only contain data types from the following list. Clarion Variable-parameters (passed by address) correspond to reference parameters on the C side unless they are omittable, in which case they correspond to pointer parameters.
Clarion C++
BYTE unsigned char
USHORT unsigned short
SHORT short
LONG long
ULONG unsigned long
SREAL float
REAL double
*CSTRING (with RAW) char&
<;*CSTRING> (with RAW) char*
<;*GROUP> (with RAW) void*
Note that for C++ compatibility the return type of a PROCEDURE is not mangled into the name. A corollary effect is that procedures cannot be distinguished by return type.
Example:
C++ prototypes:
#pragma name(prefix⇒“”)
void HADD(short,short);
void HADD(long*,unsigned char);
void HADD(short unsigned &);
void HADD(char *,void *);
!Clarion prototypes:
MODULE('')
hADD(short,short)
HaDD(<;*long>,byte)
HAdD(*ushort)
HADd(<;*CSTRING>,<;*GROUP>),RAW
END
See Also:**
NAME