Re: Numeric constants as strings

From: Andy Parkins <andyparkins@gmail.com>
Date: Feb 19, 2007, 10:14 UTC
Message-ID: <200702191014.23055.andyparkins@gmail.com>
In-Reply-To: <7virdy8p25.fsf@assigned-by-dhcp.cox.net>

On Monday 2007 February 19 09:38, Junio C Hamano wrote:

Show 9 quoted lines

> > #define HASH_WIDTH_ASCII 40
> > -               printf("%-40s %s%s (%d subtrees)\n",
> > +               printf("%-" HASH_WIDTH_ASCII "s %s%s (%d subtrees)\n",
> >
> > This compiles, but I suspect that it's not going to do what I
> > want it to do.
>
> Doesn't writing "foo" "bar" (two string literals next to each other)
> tell the compiler to concatenate them?

It's not a string literal though.

It's
 #define HASH_WIDTH_ASCII 40
rather than
 #define HASH_WIDTH_ASCII "40"

I'm wondering how to turn the first into the second using the preprocessor.

Andy

-- 
Dr Andy Parkins, M Eng (hons), MIEE
andyparkins@gmail.com