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[c++] Macro charizing operator #@ w/o Microsoft's help?

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Started by discman1028 July 18, 2008 12:44 PM

3 comments, last by discman1028 15 years, 9 months ago

discman1028

212

Author

July 18, 2008 12:44 PM

Basically, I want this:


#define TO_CHAR( a ) 'a'
...
TO_CHAR(x) ==> 'x' // btw, this gives us 'a'... :-(

(http://msdn.microsoft.com/en-us/library/91tt6dfs(VS.80).aspx) But in gcc. Let me know of any hacky way to do it, I can't think of one.

--== discman1028 ==--

dave

2,188

July 18, 2008 12:47 PM

Maybe this will help.

discman1028

212

Author

July 18, 2008 12:48 PM

Wow a solution came from a colleague a couple secs later... :)

#define TO_CHAR(a) #a[0]

--== discman1028 ==--

Zahlman

1,682

July 18, 2008 06:10 PM

That's pretty hacky. Not that the original task isn't hacky in itself :) Try

#define TO_CHAR(a) '##a##'

## is the token pasting operator.

discman1028

212

Author

July 21, 2008 07:54 PM

Quote:Original post by Zahlman
#define TO_CHAR(a) '##a##'

That ain't compiling. (Trivia: MS does have an alternate syntax for literals of the form 'abcd', which makes a word out of three or four characters... one of my tries looked something like your suggestion, with only four chars though instead of five, and compiled, but was, of course, incorrect.)

--== discman1028 ==--