Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!mailrus!ames!elroy!peregrine!zardoz!dhw68k!Rick 'Transputer' Stein
From: Rick 'Transputer' Stein@dhw68k.cts.com (Rick 'Transputer' Stein)
Newsgroups: comp.lang.c
Subject: Undeclared function arguments
Message-ID: <13168@dhw68k.cts.com>
Date: 13 Oct 88 17:48:31 GMT
Reply-To: Rick@dhw68k.cts.com ()
Distribution: na
Organization: Wolfskill residence; Anaheim, CA (USA)
Lines: 30

I wonder if any of you gurus can comment on the following fragment of
code output from lex:

The function yyback has two arguments, but only one is typed in argument
the list.  Why does my C compiler or lint, for that matter, not complain?

yyback(p,m)
int *p;
{
	if (p==0)return(0);
	while(*p)
	{
	  if ( *p++ == 0 )return(1);
	}
	return(0);
}

I've compiled this fragment along with the body of lex.yy.c on many
machines and compilers (SGI/4D, HP9000, SUN/4, Inmos transputers with
3L,MSC 4.0, etc) and no errors have been generated.  Are undeclared
function arguments auto casted to pointers?

Thanks in advance.

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| Rick 'Transputer' Stein  | uucp: ...{felix, zardoz}!dhw68k!stein |
| "Goddam digital confuser | MaBellnet: 714-786-7794 (H)           |
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