Re: [ANN] nyacc 0.80.4 released

[Jan Nieuwenhuizen <janneke@gnu.org>]

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Matt Wette writes:

> NYACC version 0.80.4 is released 
>
> This is a bug-fix release, to fix several bugs discovered by janneke.  Thanks Jan.
> 1) C parser not parsing “0ULL” as numeric; fixed.
> 2) #undef FOO not working; fixed;
> 3) struct foo { …} => (struct-def (ident (“foo”))… ; fixed: => (struct-def (ident “foo”) …
> 4) C pre-processor argument reading dropping characters 

Yay, thanks again!

Meanwhile, rain1 and I found two bugs.  First is not really a bug, debug
printing while parsing \xXX.  Do

    (with-input-from-file "x00.c" parse-c99)

with x00.c:

    char *s = "\x66\x6f\x6f\x20";

see patch attached.

The others is parsing of "\0", see null.c.  Instead of a null character
(or possibly literally "\0") we get an ascii 0 (without backslash).

Not sure what we want here, if "\0" passes through literally, the
compiler will need to parse strings again and change those to null?

Greetings,
janneke


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char *s = "\x66\x6f\x6f\x20";

int
main ()
{
  puts (s);
}

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From aa97207497b1d290734d04accf019caa4e854796 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Tue, 1 Aug 2017 19:39:25 +0200
Subject: [PATCH] typo: fix parsing of \xXX

* module/nyacc/lex.scm (read-hex): Comment-out debug printing.
---
 module/nyacc/lex.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/nyacc/lex.scm b/module/nyacc/lex.scm
index 2a4d28a..3636738 100644
--- a/module/nyacc/lex.scm
+++ b/module/nyacc/lex.scm
@@ -206,7 +206,7 @@
 	(cs:lhx (string->char-set "abcdef")))
     (lambda (ch) ;; ch == #\x always
       (let iter ((cv 0) (ch (read-char)) (n 0))
-	(simple-format #t "ch=~S\n" ch)
+	;;(simple-format #t "ch=~S\n" ch)
 	(cond
 	 ((eof-object? ch) cv)
 	 ((> n 2) (unread-char ch) cv)
-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com


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char *s = "foo\0bar";



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-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com