preprocessor question (non-ANSI)

[Barton E. Schaefer]

In article <1679 at ruuinf.cs.ruu.nl> piet at cs.ruu.nl (Piet van Oostrum) writes:
} In article <174 at eliza.edvvie.at>, johnny at edvvie (Johann Schweigl) writes:
}  `How can I replace a text token by itself, along with some additional text?
}  `EXEC SQL select * from emp;     __curline = 23; EXEC SQL select * from emp;
}  `before ^^^^^^^^^^^^^^^^^^^^     after ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
} If your preprocessor is non-ANSI, you might try:
} 
} 	#define EXEC __curline = __LINE__; EX/**/EC 

This doesn't quite work; cpp apparently re-evaluates the token as soon
as it has stripped the /**/, so it becomes recursive.  To completely
fool cpp, you must use the horrible

	#define EXEC __curline = __LINE__; EX//**/**/**//EC 

} Note that this is very unportable.

No kidding.
-- 
Bart Schaefer      "A Yellowbeard is never so dangerous as when he's dead."
                                              -- Graham Chapman, 1941-1989
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