The gcc compiler gives some warning messages when trying to compile the
following examples:

/*example1.c*/
#define CLASS(NAME) \
class NAME \
{ \
    public: \
    NAME() {}; \
    ~##NAME() {}; \
} \
 
CLASS(Test);
 
void main() {}


/* example2.c */
#define CLASS(NAME) \
class NAME \
{ \
    public: \
    NAME(); \
}; \
\
NAME##::##NAME() {};
 
CLASS(Test)
 
void main() {}

Here is the output for the compiling of example1.c:
[jimmy@chopin test]$ g++ example1.c
example1.c:7:5: warning: nothing can be pasted after this token    

Here is the output for the compiling of example2.c:
[jimmy@chopin test]$ g++ example2.c
example2.c:9:7: warning: nothing can be pasted after this token
example2.c:11:11: warning: pasting would not give a valid preprocessing
token 

The examples were compiled using g++ version 2.96:
[jimmy@chopin test]$ g++ --version
2.96

That's
all