🚀 go-pugleaf

dougm@cs.rice.edu (Doug Moore) writes:

>Following this message is an update of a patch (by an author whose
>name I have lost - sorry) to add binary constants of the form 0b11010
>to C and C++.  The update is really just a line number adjustment,
>reflecting changes in gcc 2.4.0.

There is a bug in this patch - it doesn't give a warning about
the feature being a gcc extenssion if I use '-pedantic'.

Here's my patch to the patch, completely untested of course :-)

>*** c-lex.c.orig	Tue May  4 11:45:19 1993
>--- c-lex.c	Mon May 17 20:48:07 1993
>***************
>*** 1306,1315 ****
>--- 1306,1328 ----
>  	if (c == '0')
>  	  {
>  	    *p++ = (c = getc (finput));
>+ 	    /* hexadecimal (base 16) representation */
>  	    if ((c == 'x') || (c == 'X'))
>  	      {
>  		base = 16;
>  		*p++ = (c = getc (finput));
>+ 	      }
>+ 	    /* binary (base 2) representation */
>+ 	    else if ((c == 'b') || (c == 'B'))
>+ 	      {

		if (pedantic)
		  pedwarn ("ANSI C forbids use of binary constants");

>+ 		base = 2;
>+ 		*p++ = (c = getc (finput));
>+ 	      }
>+ 	    /* octal rep. (base 8),  "traditional" form is defined below */
>+ 	    else if ((c == 'o') || (c == 'O'))
>+ 	      {

		if (pedantic)
		  pedwarn ("ANSI C forbids use of letter 'o' for octal constants");

>+ 		base = 8;
>+ 		*p++ = (c = getc (finput));
>  	      }
>  	    /* Leading 0 forces octal unless the 0 is the only digit.  */
>  	    else if (c >= '0' && c <= '9')
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