From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bakul Shah Content-Type: multipart/alternative; boundary=Apple-Mail-802BAA76-6E8F-40FE-B701-FCEF07740332 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Message-Id: <79F2255E-5E76-43E8-83B3-0DFB2CD34AC7@bitblocks.com> Date: Wed, 25 Nov 2015 23:27:24 -0800 References: <20151125160347.GN20646@sigint.cs.purdue.edu> In-Reply-To: To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Subject: Re: [9fans] Undefined Behaviour in C Topicbox-Message-UUID: 7790fa2a-ead9-11e9-9d60-3106f5b1d025 --Apple-Mail-802BAA76-6E8F-40FE-B701-FCEF07740332 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Using 0xfff...f instead of 0 for a null ptr might've been less "disgusting"!= =20 > On Nov 25, 2015, at 6:04 PM, Prof Brucee wrote: >=20 > gcc is indeed a very sad tome. The mmap of 0 is disgusting. I like kenc. I= t just works. My behaviour this afternoon will be undefined but not as stupi= d as that of some programmers. >=20 >> On 26/11/2015 5:43 AM, "Brantley Coile" wrote: >> Align it to column 7 and it looks like all the code I saw when I started.= =20 >>=20 >> iPhone email >>=20 >>> On Nov 25, 2015, at 12:13 PM, Ryan Gonzalez wrote: >>>=20 >>> Neither! It's what happens when you run sed 's/^\s*//' on your whole cod= e base, yielding results like (from cmd/yacc.c): >>>=20 >>>=20 >>> void >>> setup(int argc, char *argv[]) >>> { >>> long c, t; >>> int i, j, fd, lev, ty, ytab, *p; >>> int vflag, dflag, stem; >>> char actnm[8], *stemc, *s, dirbuf[128]; >>> Biobuf *fout; >>>=20 >>> ytab =3D 0; >>> vflag =3D 0; >>> dflag =3D 0; >>> stem =3D 0; >>> stemc =3D "y"; >>> foutput =3D 0; >>> fdefine =3D 0; >>> fdebug =3D 0; >>> ARGBEGIN{ >>> case 'v': >>> case 'V': >>> vflag++; >>> break; >>> case 'D': >>> yydebug =3D ARGF(); >>> break; >>> case 'a': >>> yyarg =3D 1; >>> break; >>> case 'd': >>> dflag++; >>> break; >>> case 'l': >>> yyline =3D 0; >>> break; >>> case 'o': >>> ytab++; >>> ytabc =3D ARGF(); >>> break; >>> case 's': >>> stem++; >>> stemc =3D ARGF(); >>> break; >>> case 'S': >>> parser =3D PARSERS; >>> break; >>> default: >>> error("illegal option: %c", ARGC()); >>> }ARGEND >>> openup(stemc, dflag, vflag, ytab, ytabc); >>> fout =3D dflag?fdefine:ftable; >>> if(yyarg){ >>> Bprint(ftable, "#define\tYYARG\t1\n\n"); >>> } >>> if((fd =3D mkstemp(ttempname)) >=3D 0){ >>> tempname =3D ttempname; >>> ftemp =3D Bfdopen(fd, OWRITE); >>> } >>> if((fd =3D mkstemp(tactname)) >=3D 0){ >>> actname =3D tactname; >>> faction =3D Bfdopen(fd, OWRITE); >>> } >>> if(ftemp =3D=3D 0 || faction =3D=3D 0) >>> error("cannot open temp file"); >>> if(argc < 1) >>> error("no input file"); >>> infile =3D argv[0]; >>> if(infile[0] !=3D '/' && getwd(dirbuf, sizeof dirbuf)!=3Dnil){ >>> i =3D strlen(infile)+1+strlen(dirbuf)+1+10; >>> s =3D malloc(i); >>> if(s !=3D nil){ >>> snprint(s, i, "%s/%s", dirbuf, infile); >>> cleanname(s); >>> infile =3D s; >>> } >>> } >>> finput =3D Bopen(infile, OREAD); >>> if(finput =3D=3D 0) >>> error("cannot open '%s'", argv[0]); >>> cnamp =3D cnames; >>>=20 >>> defin(0, "$end"); >>> extval =3D PRIVATE; /* tokens start in unicode 'private use' */ >>> defin(0, "error"); >>> defin(1, "$accept"); >>> defin(0, "$unk"); >>> mem =3D mem0; >>> i =3D 0; >>>=20 >>> for(t =3D gettok(); t !=3D MARK && t !=3D ENDFILE;) >>> switch(t) { >>> case ';': >>> t =3D gettok(); >>> break; >>>=20 >>> case START: >>> if(gettok() !=3D IDENTIFIER) >>> error("bad %%start construction"); >>> start =3D chfind(1, tokname); >>> t =3D gettok(); >>> continue; >>>=20 >>> case TYPEDEF: >>> if(gettok() !=3D TYPENAME) >>> error("bad syntax in %%type"); >>> ty =3D numbval; >>> for(;;) { >>> t =3D gettok(); >>> switch(t) { >>> case IDENTIFIER: >>> if((t=3Dchfind(1, tokname)) < NTBASE) { >>> j =3D TYPE(toklev[t]); >>> if(j !=3D 0 && j !=3D ty) >>> error("type redeclaration of token %s", >>> tokset[t].name); >>> else >>> SETTYPE(toklev[t], ty); >>> } else { >>> j =3D nontrst[t-NTBASE].value; >>> if(j !=3D 0 && j !=3D ty) >>> error("type redeclaration of nonterminal %s", >>> nontrst[t-NTBASE].name ); >>> else >>> nontrst[t-NTBASE].value =3D ty; >>> } >>> case ',': >>> continue; >>> case ';': >>> t =3D gettok(); >>> default: >>> break; >>> } >>> break; >>> } >>> continue; >>>=20 >>> case UNION: >>> /* copy the union declaration to the output */ >>> cpyunion(); >>> t =3D gettok(); >>> continue; >>>=20 >>> case LEFT: >>> case BINARY: >>> case RIGHT: >>> i++; >>>=20 >>> case TERM: >>> /* nonzero means new prec. and assoc. */ >>> lev =3D t-TERM; >>> ty =3D 0; >>>=20 >>> /* get identifiers so defined */ >>> t =3D gettok(); >>>=20 >>> /* there is a type defined */ >>> if(t =3D=3D TYPENAME) { >>> ty =3D numbval; >>> t =3D gettok(); >>> } >>> for(;;) { >>> switch(t) { >>> case ',': >>> t =3D gettok(); >>> continue; >>>=20 >>> case ';': >>> break; >>>=20 >>> case IDENTIFIER: >>> j =3D chfind(0, tokname); >>> if(j >=3D NTBASE) >>> error("%s defined earlier as nonterminal", tokname); >>> if(lev) { >>> if(ASSOC(toklev[j])) >>> error("redeclaration of precedence of %s", tokname); >>> SETASC(toklev[j], lev); >>> SETPLEV(toklev[j], i); >>> } >>> if(ty) { >>> if(TYPE(toklev[j])) >>> error("redeclaration of type of %s", tokname); >>> SETTYPE(toklev[j],ty); >>> } >>> t =3D gettok(); >>> if(t =3D=3D NUMBER) { >>> tokset[j].value =3D numbval; >>> if(j < ndefout && j > 3) >>> error("please define type number of %s earlier", >>> tokset[j].name); >>> t =3D gettok(); >>> } >>> continue; >>> } >>> break; >>> } >>> continue; >>>=20 >>> case LCURLY: >>> defout(0); >>> cpycode(); >>> t =3D gettok(); >>> continue; >>>=20 >>> default: >>> error("syntax error"); >>> } >>> if(t =3D=3D ENDFILE) >>> error("unexpected EOF before %%"); >>>=20 >>> /* t is MARK */ >>> if(!yyarg) >>> Bprint(ftable, "extern int yyerrflag;\n"); >>> Bprint(ftable, "#ifndef YYMAXDEPTH\n"); >>> Bprint(ftable, "#define YYMAXDEPTH 150\n"); >>> Bprint(ftable, "#endif\n" ); >>> if(!ntypes) { >>> Bprint(ftable, "#ifndef YYSTYPE\n"); >>> Bprint(ftable, "#define YYSTYPE int\n"); >>> Bprint(ftable, "#endif\n"); >>> } >>> if(!yyarg){ >>> Bprint(ftable, "YYSTYPE yylval;\n"); >>> Bprint(ftable, "YYSTYPE yyval;\n"); >>> }else{ >>> if(dflag) >>> Bprint(ftable, "#include \"%s.%s\"\n\n", stemc, FILED); >>> Bprint(fout, "struct Yyarg {\n"); >>> Bprint(fout, "\tint\tyynerrs;\n"); >>> Bprint(fout, "\tint\tyyerrflag;\n"); >>> Bprint(fout, "\tvoid*\targ;\n"); >>> Bprint(fout, "\tYYSTYPE\tyyval;\n"); >>> Bprint(fout, "\tYYSTYPE\tyylval;\n"); >>> Bprint(fout, "};\n\n"); >>> } >>> prdptr[0] =3D mem; >>>=20 >>> /* added production */ >>> *mem++ =3D NTBASE; >>>=20 >>> /* if start is 0, we will overwrite with the lhs of the first rule */ >>> *mem++ =3D start; >>> *mem++ =3D 1; >>> *mem++ =3D 0; >>> prdptr[1] =3D mem; >>> while((t=3Dgettok()) =3D=3D LCURLY) >>> cpycode(); >>> if(t !=3D IDENTCOLON) >>> error("bad syntax on first rule"); >>>=20 >>> if(!start) >>> prdptr[0][1] =3D chfind(1, tokname); >>>=20 >>> /* read rules */ >>> while(t !=3D MARK && t !=3D ENDFILE) { >>> /* process a rule */ >>> rlines[nprod] =3D lineno; >>> if(t =3D=3D '|') >>> *mem++ =3D *prdptr[nprod-1]; >>> else >>> if(t =3D=3D IDENTCOLON) { >>> *mem =3D chfind(1, tokname); >>> if(*mem < NTBASE) >>> error("token illegal on LHS of grammar rule"); >>> mem++; >>> } else >>> error("illegal rule: missing semicolon or | ?"); >>> /* read rule body */ >>> t =3D gettok(); >>>=20 >>> more_rule: >>> while(t =3D=3D IDENTIFIER) { >>> *mem =3D chfind(1, tokname); >>> if(*mem < NTBASE) >>> levprd[nprod] =3D toklev[*mem]; >>> mem++; >>> t =3D gettok(); >>> } >>> if(t =3D=3D PREC) { >>> if(gettok() !=3D IDENTIFIER) >>> error("illegal %%prec syntax"); >>> j =3D chfind(2, tokname); >>> if(j >=3D NTBASE) >>> error("nonterminal %s illegal after %%prec", >>> nontrst[j-NTBASE].name); >>> levprd[nprod] =3D toklev[j]; >>> t =3D gettok(); >>> } >>> if(t =3D=3D '=3D') { >>> levprd[nprod] |=3D ACTFLAG; >>> Bprint(faction, "\ncase %d:", nprod); >>> cpyact(mem-prdptr[nprod]-1); >>> Bprint(faction, " break;"); >>> if((t=3Dgettok()) =3D=3D IDENTIFIER) { >>>=20 >>> /* action within rule... */ >>> sprint(actnm, "$$%d", nprod); >>>=20 >>> /* make it a nonterminal */ >>> j =3D chfind(1, actnm); >>>=20 >>> /* >>> * the current rule will become rule number nprod+1 >>> * move the contents down, and make room for the null >>> */ >>> for(p =3D mem; p >=3D prdptr[nprod]; --p) >>> p[2] =3D *p; >>> mem +=3D 2; >>>=20 >>> /* enter null production for action */ >>> p =3D prdptr[nprod]; >>> *p++ =3D j; >>> *p++ =3D -nprod; >>>=20 >>> /* update the production information */ >>> levprd[nprod+1] =3D levprd[nprod] & ~ACTFLAG; >>> levprd[nprod] =3D ACTFLAG; >>> if(++nprod >=3D NPROD) >>> error("more than %d rules", NPROD); >>> prdptr[nprod] =3D p; >>>=20 >>> /* make the action appear in the original rule */ >>> *mem++ =3D j; >>>=20 >>> /* get some more of the rule */ >>> goto more_rule; >>> } >>> } >>>=20 >>> while(t =3D=3D ';') >>> t =3D gettok(); >>> *mem++ =3D -nprod; >>>=20 >>> /* check that default action is reasonable */ >>> if(ntypes && !(levprd[nprod]&ACTFLAG) && nontrst[*prdptr[nprod]-NTBASE].= value) { >>>=20 >>> /* no explicit action, LHS has value */ >>> int tempty; >>>=20 >>> tempty =3D prdptr[nprod][1]; >>> if(tempty < 0) >>> error("must return a value, since LHS has a type"); >>> else >>> if(tempty >=3D NTBASE) >>> tempty =3D nontrst[tempty-NTBASE].value; >>> else >>> tempty =3D TYPE(toklev[tempty]); >>> if(tempty !=3D nontrst[*prdptr[nprod]-NTBASE].value) >>> error("default action causes potential type clash"); >>> } >>> nprod++; >>> if(nprod >=3D NPROD) >>> error("more than %d rules", NPROD); >>> prdptr[nprod] =3D mem; >>> levprd[nprod] =3D 0; >>> } >>>=20 >>> /* end of all rules */ >>> defout(1); >>>=20 >>> finact(); >>> if(t =3D=3D MARK) { >>> Bprint(ftable, "\n"); >>> if(yyline) >>> Bprint(ftable, "#line\t%d\t\"%s\"\n", lineno, infile); >>> while((c=3DBgetrune(finput)) !=3D Beof) >>> Bputrune(ftable, c); >>> } >>> Bterm(finput); >>> } >>>=20 >>>=20 >>>> On Wed, Nov 25, 2015 at 10:03 AM, wrote= : >>>> On Wed, Nov 25, 2015 at 09:25:55AM -0500, Brantley Coile wrote: >>>> > unindented consequences >>>>=20 >>>> Is that a class of Python bugs or an awesome name for a Nerdcore band? >>>=20 >>>=20 >>>=20 >>> --=20 >>> Ryan >>> [ERROR]: Your autotools build scripts are 200 lines longer than your pro= gram. Something=E2=80=99s wrong. >>> http://kirbyfan64.github.io/ --Apple-Mail-802BAA76-6E8F-40FE-B701-FCEF07740332 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Using 0xfff...f instead of 0= for a null ptr might've been less "disgusting"! 

On Nov 2= 5, 2015, at 6:04 PM, Prof Brucee <prof.brucee@gmail.com> wrote:

gcc is indeed a very sad tome. The mmap of 0 is disgus= ting. I like kenc. It just works. My behaviour this afternoon will be undefi= ned but not as stupid as that of some programmers.

On 26/11/2015 5:43 AM, "Brantley Coile" <brantleycoile@me.com> wrote:
Align it to column 7 and it= looks like all the code I saw when I started. 

iPhone em= ail

On Nov 25, 2015, at 12:13 PM, Ryan Gonzalez <rymg19@gmail.com> wrote:<= br>
Neither! It's w= hat happens when you run sed 's/^\s*//' on your whole code base, yielding re= sults like (from cmd/yacc.c):


void
setup(int argc, char *argv[])
{
long c, t;
=
int i, j, fd, lev, ty, ytab, *p;
int vflag, dflag, stem;
char actnm[8], *stemc, *s, dirbuf[128];
Biobuf *fout;
<= div>
ytab =3D 0;
vflag =3D 0;
dflag =3D 0;=
stem =3D 0;
stemc =3D "y";
foutput =3D 0;
fdefine =3D 0;
fdebug =3D 0;
ARGBEGIN{
= case 'v':
case 'V':
vflag++;
break;
= case 'D':
yydebug =3D ARGF();
break;
case 'a':=
yyarg =3D 1;
break;
case 'd':
dflag= ++;
break;
case 'l':
yyline =3D 0;
b= reak;
case 'o':
ytab++;
ytabc =3D ARGF();
break;
case 's':
stem++;
stemc =3D ARGF(= );
break;
case 'S':
parser =3D PARSERS;
<= div>break;
default:
error("illegal option: %c", ARGC());=
}ARGEND
openup(stemc, dflag, vflag, ytab, ytabc);
=
fout =3D dflag?fdefine:ftable;
if(yyarg){
Bprint(ft= able, "#define\tYYARG\t1\n\n");
}
if((fd =3D mkstemp(tte= mpname)) >=3D 0){
tempname =3D ttempname;
ftemp =3D B= fdopen(fd, OWRITE);
}
if((fd =3D mkstemp(tactname)) >= =3D 0){
actname =3D tactname;
faction =3D Bfdopen(fd, OW= RITE);
}
if(ftemp =3D=3D 0 || faction =3D=3D 0)
error("cannot open temp file");
if(argc < 1)
error(= "no input file");
infile =3D argv[0];
if(infile[0] !=3D '= /' && getwd(dirbuf, sizeof dirbuf)!=3Dnil){
i =3D strlen(i= nfile)+1+strlen(dirbuf)+1+10;
s =3D malloc(i);
if(s !=3D= nil){
snprint(s, i, "%s/%s", dirbuf, infile);
cleanname= (s);
infile =3D s;
}
}
finput =3D Bo= pen(infile, OREAD);
if(finput =3D=3D 0)
error("cannot op= en '%s'", argv[0]);
cnamp =3D cnames;

def= in(0, "$end");
extval =3D PRIVATE; /* tokens start in unicode 'private use' */
defin(= 0, "error");
defin(1, "$accept");
defin(0, "$unk");
mem =3D mem0;
i =3D 0;

for(t =3D ge= ttok(); t !=3D MARK && t !=3D ENDFILE;)
switch(t) {
<= div>case ';':
t =3D gettok();
break;

case START:
if(gettok() !=3D IDENTIFIER)
error("ba= d %%start construction");
start =3D chfind(1, tokname);
= t =3D gettok();
continue;

case TYPEDEF:
if(gettok() !=3D TYPENAME)
error("bad syntax in %%type");=
ty =3D numbval;
for(;;) {
t =3D gettok();
switch(t) {
case IDENTIFIER:
if((t=3Dchfind(1, to= kname)) < NTBASE) {
j =3D TYPE(toklev[t]);
if(j !=3D 0= && j !=3D ty)
error("type redeclaration of token %s",
tokset[t].name);
else
SETTYPE(toklev[t], ty);
} else {
j =3D nontrst[t-NTBASE].value;
if(j !=3D= 0 && j !=3D ty)
error("type redeclaration of nonterminal %= s",
nontrst[t-NTBASE].name );
else
nontrst[t-N= TBASE].value =3D ty;
}
case ',':
continue;
case ';':
t =3D gettok();
default:
brea= k;
}
break;
}
continue;
case UNION:
/* copy the union declaration to the outp= ut */
cpyunion();
t =3D gettok();
continue;

case LEFT:
case BINARY:
case RIGH= T:
i++;

case TERM:
/* nonzero m= eans new prec. and assoc. */
lev =3D t-TERM;
ty =3D 0;

/* get identifiers so defined */
t =3D get= tok();

/* there is a type defined */
if(t= =3D=3D TYPENAME) {
ty =3D numbval;
t =3D gettok();
}
for(;;) {
switch(t) {
case ',':
<= div>t =3D gettok();
continue;

case ';':
break;

case IDENTIFIER:
j =3D ch= find(0, tokname);
if(j >=3D NTBASE)
error("%s defined= earlier as nonterminal", tokname);
if(lev) {
if(ASSOC(t= oklev[j]))
error("redeclaration of precedence of %s", tokname);
SETASC(toklev[j], lev);
SETPLEV(toklev[j], i);
}=
if(ty) {
if(TYPE(toklev[j]))
error("redeclara= tion of type of %s", tokname);
SETTYPE(toklev[j],ty);
}<= /div>
t =3D gettok();
if(t =3D=3D NUMBER) {
tokset[j= ].value =3D numbval;
if(j < ndefout && j > 3)
<= div>error("please define type number of %s earlier",
tokset[j].nam= e);
t =3D gettok();
}
continue;
}
break;
}
continue;

case= LCURLY:
defout(0);
cpycode();
t =3D gettok();=
continue;

default:
error("synt= ax error");
}
if(t =3D=3D ENDFILE)
error("unex= pected EOF before %%");

/* t is MARK */
i= f(!yyarg)
Bprint(ftable, "extern int yyer= rflag;\n");
Bprint(ftable, "#ifndef YYMAXDEPTH\n");
Bprint(ftable, "#define YYMAXDEPTH 150\n");
Bprint(ftable, "#endif\n" );
if(!ntypes) {
Bprint(ftable, "#ifndef YYSTYPE\n");
Bprint(ftable, "#define YYSTYPE int\n");
Bprint(ftable, "#endif\n");
=
}
if(!yyarg){
Bprint(ftable, "YYSTYPE yylval;\n");
Bprint(ftable, "YYSTY= PE yyval;\n");
}else{=
if(dflag)
Bprint(ftable, "#include \"%s.%s\"\n\n", stem= c, FILED);
Bprint(fout, "struct Yyarg {\n");
Bprint(fout= , "\tint\tyynerrs;\n");
Bprint(fout, "\tint\tyyerrflag;\n");
=
Bprint(fout, "\tvoid*\targ;\n");
Bprint(fout, "\tYYSTYPE\tyyv= al;\n");
Bprint(fout, "\tYYSTYPE\tyylval;\n");
Bprint(fo= ut, "};\n\n");
}
prdptr[0] =3D mem;

=
/* added production */
*mem++ =3D NTBASE;

/* if start is 0, we will overwrite with the lhs of the first rule */<= /div>
*mem++ =3D start;
*mem++ =3D 1;
*mem++ =3D 0;<= /div>
prdptr[1] =3D mem;
while((t=3Dgettok()) =3D=3D LCURLY)
cpycode();
if(t !=3D IDENTCOLON)
error("bad syn= tax on first rule");

if(!start)
prdptr[0]= [1] =3D chfind(1, tokname);

/* read rules */
<= div>while(t !=3D MARK && t !=3D ENDFILE) {
/* process a ru= le */
rlines[nprod] =3D lineno;
if(t =3D=3D '|')
*mem++ =3D *prdptr[nprod-1];
else
if(t =3D=3D IDENTCO= LON) {
*mem =3D chfind(1, tokname);
if(*mem < NTBASE)=
error("token illegal on LHS of grammar rule");
mem++;
} else
error("illegal rule: missing semicolon or | ?");
/* read rule body */
t =3D gettok();

=
more_rule:
while(t =3D=3D IDENTIFIER) {
*mem =3D ch= find(1, tokname);
if(*mem < NTBASE)
levprd[nprod] =3D= toklev[*mem];
mem++;
t =3D gettok();
}
<= div>if(t =3D=3D PREC) {
if(gettok() !=3D IDENTIFIER)
err= or("illegal %%prec syntax");
j =3D chfind(2, tokname);
i= f(j >=3D NTBASE)
error("nonterminal %s illegal after %%prec",
nontrst[j-NTBASE].name);
levprd[nprod] =3D toklev[j];
t =3D gettok();
}
if(t =3D=3D '=3D') {
= levprd[nprod] |=3D ACTFLAG;
Bprint(faction, "\ncase %d:", nprod);<= /div>
cpyact(mem-prdptr[nprod]-1);
Bprint(faction, " break;");=
if((t=3Dgettok()) =3D=3D IDENTIFIER) {

/= * action within rule... */
sprint(actnm, "$$%d", nprod);

/* make it a nonterminal */
j =3D chfind(1, actnm)= ;

/*
* the current rule will become rule n= umber nprod+1
* move the contents down, and make room for the null=
*/
for(p =3D mem; p >=3D prdptr[nprod]; --p)
p[2] =3D *p;
mem +=3D 2;

/* enter null= production for action */
p =3D prdptr[nprod];
*p++ =3D j= ;
*p++ =3D -nprod;

/* update the producti= on information */
levprd[nprod+1] =3D levprd[nprod] & ~ACTFLAG= ;
levprd[nprod] =3D ACTFLAG;
if(++nprod >=3D NPROD)
error("more than %d rules", NPROD);
prdptr[nprod] =3D p;<= /div>

/* make the action appear in the original rule */
*mem++ =3D j;

/* get some more of the rule= */
goto more_rule;
}
}

while(t =3D=3D ';')
t =3D gettok();
*mem++ =3D -nprod= ;

/* check that default action is reasonable */
if(ntypes && !(levprd[nprod]&ACTFLAG) && nontrst[= *prdptr[nprod]-NTBASE].value) {

/* no explicit acti= on, LHS has value */
int tempty;

tempty =3D= prdptr[nprod][1];
if(tempty < 0)
error("must return a= value, since LHS has a type");
else
if(tempty >=3D N= TBASE)
tempty =3D nontrst[tempty-NTBASE].value;
else
tempty =3D TYPE(toklev[tempty]);
if(tempty !=3D nontrst[*pr= dptr[nprod]-NTBASE].value)
error("default action causes potential t= ype clash");
}
nprod++;
if(nprod >=3D NPROD= )
error("more than %d rules", NPROD);
prdptr[nprod] =3D m= em;
levprd[nprod] =3D 0;
}

/* e= nd of all rules */
defout(1);

finact();
if(t =3D=3D MARK) {
Bprint(ftable, "\n");
if(yy= line)
Bprint(ftable, "#line\t%d\t\"%s\"\n", lineno, infile);
=
while((c=3DBgetrune(finput)) !=3D Beof)
Bputrune(ftable, c);<= /div>
}
Bterm(finput);
}

<= /div>

On Wed, Nov 2= 5, 2015 at 10:03 AM, <plannine@sigint.cs.purdue.edu> wrote:
On Wed, Nov 25, 2015 at 09:25:55= AM -0500, Brantley Coile wrote:
> unindented consequences

Is that a class of Python bugs or an awesome name for a Nerdcore band?




--
Ryan
<= div dir=3D"ltr">[ERROR]: Your autotools build scripts are 200 lines longer t= han your program. Something=E2=80=99s wrong.
= --Apple-Mail-802BAA76-6E8F-40FE-B701-FCEF07740332--