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y.tab.pl
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y.tab.pl
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$yysccsid = "@(#)yaccpar 1.8 (Berkeley) 01/20/91 (Perl 2.0 12/31/92)";
#define YYBYACC 1
$INT=257;
$FLOAT=258;
$STRING=259;
$IDENT=260;
$EQ=261;
$NE=262;
$PLUS=263;
$GT=264;
$GE=265;
$LT=266;
$LE=267;
$L_SHIFT=268;
$R_SHIFT=269;
$EXP=270;
$UNARY=271;
$YYERRCODE=256;
@yylhs = ( -1,
0, 1, 1, 1, 1, 1, 1,
);
@yylen = ( 2,
1, 3, 3, 3, 3, 3, 1,
);
@yydefred = ( 0,
7, 0, 0, 0, 0, 0, 0, 0, 0, 2,
0, 0, 5, 6,
);
@yydgoto = ( 3,
4,
);
@yysindex = ( -40,
0, -40, 0, -39, -28, -40, -40, -40, -40, 0,
-26, -26, 0, 0,
);
@yyrindex = ( 0,
0, 0, 0, 7, 0, 0, 0, 0, 0, 0,
1, 2, 0, 0,
);
@yygindex = ( 0,
3,
);
$YYTABLESIZE=217;
@yytable = ( 2,
3, 4, 8, 6, 5, 7, 1, 9, 11, 12,
13, 14, 10, 8, 6, 8, 7, 0, 9, 0,
9, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 3, 4, 3, 4, 3, 4, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1,
);
@yycheck = ( 40,
0, 0, 42, 43, 2, 45, 0, 47, 6, 7,
8, 9, 41, 42, 43, 42, 45, -1, 47, -1,
47, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 41, 41, 43, 43, 45, 45, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, 257,
);
$YYFINAL=3;
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
$YYMAXTOKEN=271;
#if YYDEBUG
@yyname = (
"end-of-file",'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','',
"'!'",'','','','',"'&'",'',"'('","')'","'*'","'+'",'',"'-'",'',"'/'",'','','','','','','','','',
'','','','',"'='",'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','',
'','','','','','','','','','','','','','','','','','','','','','','','','','','','','',"'|'",'','','','','','','','',
'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','',
'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','',
'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','','',
'','','','',"INT","FLOAT","STRING","IDENT","EQ","NE","PLUS","GT","GE","LT","LE",
"L_SHIFT","R_SHIFT","EXP","UNARY",
);
@yyrule = (
"\$accept : start_expr",
"start_expr : expr",
"expr : '(' expr ')'",
"expr : expr '+' expr",
"expr : expr '-' expr",
"expr : expr '*' expr",
"expr : expr '/' expr",
"expr : INT",
);
#endif
sub yyclearin { $yychar = -1; }
sub yyerrok { $yyerrflag = 0; }
$YYSTACKSIZE = $YYSTACKSIZE || $YYMAXDEPTH || 500;
$YYMAXDEPTH = $YYMAXDEPTH || $YYSTACKSIZE || 500;
$yyss[$YYSTACKSIZE] = 0;
$yyvs[$YYSTACKSIZE] = 0;
sub YYERROR { ++$yynerrs; &yy_err_recover; }
sub yy_err_recover
{
if ($yyerrflag < 3)
{
$yyerrflag = 3;
while (1)
{
if (($yyn = $yysindex[$yyss[$yyssp]]) &&
($yyn += $YYERRCODE) >= 0 &&
$yycheck[$yyn] == $YYERRCODE)
{
#if YYDEBUG
print "yydebug: state $yyss[$yyssp], error recovery shifting",
" to state $yytable[$yyn]\n" if $yydebug;
#endif
$yyss[++$yyssp] = $yystate = $yytable[$yyn];
$yyvs[++$yyvsp] = $yylval;
print "yyvs = ", @yyvs, "\n";
next yyloop;
}
else
{
#if YYDEBUG
print "yydebug: error recovery discarding state ",
$yyss[$yyssp], "\n" if $yydebug;
#endif
return(1) if $yyssp <= 0;
--$yyssp;
--$yyvsp;
}
}
}
else
{
return (1) if $yychar == 0;
#if YYDEBUG
if ($yydebug)
{
$yys = '';
if ($yychar <= $YYMAXTOKEN) { $yys = $yyname[$yychar]; }
if (!$yys) { $yys = 'illegal-symbol'; }
print "yydebug: state $yystate, error recovery discards ",
"token $yychar ($yys)\n";
}
#endif
$yychar = -1;
next yyloop;
}
0;
} # yy_err_recover
sub yyparse
{
#ifdef YYDEBUG
if ($yys = $ENV{'YYDEBUG'})
{
$yydebug = int($1) if $yys =~ /^(\d)/;
}
#endif
$yynerrs = 0;
$yyerrflag = 0;
$yychar = (-1);
$yyssp = 0;
$yyvsp = 0;
$yyss[$yyssp] = $yystate = 0;
yyloop: while(1)
{
yyreduce: {
last yyreduce if ($yyn = $yydefred[$yystate]);
if ($yychar < 0)
{
if (($yychar = &yylex) < 0) { $yychar = 0; }
#if YYDEBUG
if ($yydebug)
{
$yys = '';
if ($yychar <= $#yyname) { $yys = $yyname[$yychar]; }
if (!$yys) { $yys = 'illegal-symbol'; };
print "yydebug: state $yystate, reading $yychar ($yys)\n";
}
#endif
}
if (($yyn = $yysindex[$yystate]) && ($yyn += $yychar) >= 0 &&
$yycheck[$yyn] == $yychar)
{
#if YYDEBUG
print "yydebug: state $yystate, shifting to state ",
$yytable[$yyn], "\n" if $yydebug;
#endif
$yyss[++$yyssp] = $yystate = $yytable[$yyn];
$yyvs[++$yyvsp] = $yylval;
print "yyvs = ", @yyvs, "\n";
$yychar = (-1);
--$yyerrflag if $yyerrflag > 0;
next yyloop;
}
if (($yyn = $yyrindex[$yystate]) && ($yyn += $yychar) >= 0 &&
$yycheck[$yyn] == $yychar)
{
$yyn = $yytable[$yyn];
last yyreduce;
}
if (! $yyerrflag) {
&yyerror('syntax error');
++$yynerrs;
}
return(1) if &yy_err_recover;
} # yyreduce
#if YYDEBUG
print "yydebug: state $yystate, reducing by rule ",
"$yyn ($yyrule[$yyn])\n" if $yydebug;
#endif
$yym = $yylen[$yyn];
$yyval = $yyvs[$yyvsp+1-$yym];
switch:
{
if ($yyn == 1) {
#line 40 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-0];
print "ans = ",$yyval,"\n";
last switch;
} }
if ($yyn == 2) {
#line 47 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-1] ;
last switch;
} }
if ($yyn == 3) {
#line 51 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-2] + $yyvs[$yyvsp-0];
print "sum=", $yyvs[$yyvsp-2], $yyvs[$yyvsp-0], $yyval, "\n";
last switch;
} }
if ($yyn == 4) {
#line 56 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-2] - $yyvs[$yyvsp-0] ;
last switch;
} }
if ($yyn == 5) {
#line 60 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-2] * $yyvs[$yyvsp-0] ;
last switch;
} }
if ($yyn == 6) {
#line 64 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-2] / $yyvs[$yyvsp-0] ;
last switch;
} }
if ($yyn == 7) {
#line 68 "smallcalc.pl.y"
{
$yyval = $yyvs[$yyvsp-0];
last switch;
} }
#line 296 "y.tab.pl"
} # switch
$yyssp -= $yym;
$yystate = $yyss[$yyssp];
$yyvsp -= $yym;
$yym = $yylhs[$yyn];
if ($yystate == 0 && $yym == 0)
{
#if YYDEBUG
print "yydebug: after reduction, shifting from state 0 ",
"to state (final) $YYFINAL\n" if $yydebug;
#endif
$yystate = $YYFINAL;
$yyss[++$yyssp] = $YYFINAL;
$yyvs[++$yyvsp] = $yyval;
print "yyvs = ", @yyvs, "\n";
if ($yychar < 0)
{
if (($yychar = &yylex) < 0) { $yychar = 0; }
#if YYDEBUG
if ($yydebug)
{
$yys = '';
if ($yychar <= $#yyname) { $yys = $yyname[$yychar]; }
if (!$yys) { $yys = 'illegal-symbol'; }
print "yydebug: state (final) $YYFINAL, reading $yychar ($yys)\n";
}
#endif
}
return(0) if $yychar == 0;
next yyloop;
}
if (($yyn = $yygindex[$yym]) && ($yyn += $yystate) >= 0 &&
$yyn <= $#yycheck && $yycheck[$yyn] == $yystate)
{
$yystate = $yytable[$yyn];
} else {
$yystate = $yydgoto[$yym];
}
#if YYDEBUG
print "yydebug: after reduction, shifting from state ",
"$yyss[$yyssp] to state $yystate\n" if $yydebug;
#endif
$yyss[++$yyssp] = $yystate;
$yyvs[++$yyvsp] = $yyval;
print "yyvs = ", @yyvs, "\n";
} # yyloop
} # yyparse
#line 74 "smallcalc.pl.y"
@tokenlist = ( $INT, ord('+'), $INT, ord('*'), $INT );
@lvallist = ( 6, 100, 5, 200, 2 );
# Hand-coded lex until I write lex -p, too!
sub yylex
{
if( length( @tokenlist ) )
{
$yylval = shift( @lvallist );
return shift(@tokenlist );
}
else
{
return 0;
}
}
yyparse()
#line 364 "y.tab.pl"