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<H2><A NAME="s7">7.</A> <A HREF="Lex-YACC-HOWTO.html#toc7">$B%G%P%C%0(B</A></H2>
<P>$B%W%m%0%i%`$r!"F0$+$7$J$,$i3X$V$h$&$J;~$OFC$K!"%G%P%C%05!G=$,$"$k$3$H(B
$B$,=EMW$K$J$j$^$9!#9,1?$K$b(BYACC$B$O!"B??t$N%U%#!<%I%P%C%/$rJV$95!G=$r;}$C(B
$B$F$$$^$9!#$3$N5!G=$O$$$/$i$+%*!<%P!<%X%C%I$rI,MW$H$9$k$N$G!";HMQ$K$"$?$C(B
$B$F$O4v$D$+$N%9%$%C%A$r%$%M!<%V%k$K$9$kI,MW$,$"$j$^$9!#(B</P>
<P>$BJ8K!$r%3%s%Q%$%k$9$k;~$O!"(BYACC $B$N%3%^%s%I%i%$%s$K!"(B--debug
$B$d(B --verbose $B$r$D$1$^$9!#J8K!%U%!%$%k$N(B C $B%X%C%@It$K$O!"0J2<(B
$B$rIU2C$7$^$9!#(B</P>
<P>int yydebug=1;</P>
<P>$B$3$l$O(B 'y.output' $B$H$$$&!"=PNO$5$l$?%9%F!<%H%^%7%s$r@bL@$9$k%U%!%$%k$r(B
$B@8@.$7$^$9!#(B</P>
<P>$B@8@.$5$l$?%P%$%J%j$r<B9T$9$k$H!"$3$N%U%!%$%k$O!"8=:_5/$3$C$F$$$k$3$H$K(B
$B$D$$$F!"(B*$BHs>o$K$?$/$5$s$N(B* $B>pJs$r=PNO$7$F$/$l$^$9!#$3$l$K$O!"%9%F!<%H(B
$B%^%7%s$,$I$s$J%9%F!<%H$rJ]M-$7$F$$$k$N$+!"$I$s$J%H!<%/%s$,FI$_9~$^$l$F(B
$B$$$k$N$+Ey$N>pJs$b4^$^$l$^$9!#(B</P>
<P>Peter Jinks $B$O(B
<A HREF="http://www.cs.man.ac.uk/~pjj/cs2121/debug.html">debugging</A>
$B$K$h$/$"$k%(%i!<$d!"%(%i!<$X$NBP=h$N;EJ}$J$I$r:\$;$F$$$^$9!#(B</P>
<H2><A NAME="ss7.1">7.1</A> <A HREF="Lex-YACC-HOWTO.html#toc7.1">$B%9%F!<%H%^%7%s(B</A>
</H2>
<P>YACC $B$G@8@.$7$?9=J82r@O4o$O!"FbItE*$K$O(B '$B%9%F!<%H%^%7%s(B' $B$H$$$&$b$N$r(B
$B<B9T$7$F$$$^$9!#L>A0$,<($9$h$&$K!"$3$l$O!"$$$/$D$+$N%9%F!<%H!J>uBV!K$r(B
$B$H$jF@$k%^%7%s!J5!3#!K$N$3$H$G$9!#$I$N%9%F!<%H$+$i$I$N%9%F!<%H$XA+0\$9(B
$B$k$+$r7hDj$9$k5,B'!"$H$$$&$N$bB8:_$7$^$9!#A4$F$OI.<T$,A0=R$7$?!"$$$o$f(B
$B$k(B 'root' $B5,B'$,5/E@$H$J$j$^$9!#(B</P>
<P>Example 7 $B$N(B y.output $B$+$i$N=PNO$r0zMQ$9$k$H(B -</P>
<P>
<BLOCKQUOTE><CODE>
<PRE>
state 0
ZONETOK , and go to state 1
$default reduce using rule 1 (commands)
commands go to state 29
command go to state 2
zone_set go to state 3
</PRE>
</CODE></BLOCKQUOTE>
</P>
<P>$B$3$N%9%F!<%H$O!"%G%U%)%k%H$G$O(B 'commands' $B5,B'$rMQ$$$F4T85$7$^$9!#$3$l(B
$B$O!"A0=R$7$?:F5"$K4X$9$k5,B'$G$"$j!"8D!9$N%3%^%s%IJ8!"%;%_%3%m%s!"99$K(B
$BB3$/%3%^%s%I$+$i9=@.$5$l$k(B 'commands' $B$rDj5A$7$F$$$^$9!#(B</P>
<P>$B$3$N%9%F!<%H$O!"2r<a$G$-$k%H!<%/%s(B - $B$3$N>l9g(B ZONETOK $BB($A(B 'zone' $B$H$$(B
$B$&C18l(B - $B$KE~C#$9$k$^$G4T85$7$^$9!#$=$l$+$i!"%9%F!<%H(B 1 $B$XA+0\$7!"(Bzone
$B%3%^%s%I$r$5$i$K>\$7$/=hM}$7$^$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<PRE>
state 1
zone_set -> ZONETOK . quotedname zonecontent (rule 4)
QUOTE , and go to state 4
quotedname go to state 5
</PRE>
</CODE></BLOCKQUOTE>
</P>
<P>$B:G=i$N9T$O8=:_$N>l=j$r<($9(B '.' $B$r4^$s$G$$$^$9(B - ZONETOK $B$O4{$K8+$D$+$C(B
$B$?$N$G!"<!$K(B 'quotedname' $B$rC5$7$F$$$^$9!#(Bquotedname $B$O(B QUOTE $B$G;O$^$k(B
$B$N$G!"%9%F!<%H(B 4 $B$KA+0\$9$k$3$H$K$J$j$^$9!#(B</P>
<P>$B0J>e$K$D$$$F$b$&>/$77!$j2<$2$?$$J}$O!"(BExample 7 $B$r%G%P%C%0$N>O$G?($l$?(B
$B%U%i%0$rIU$1$F%3%s%Q%$%k$7$F$_$F$/$@$5$$!#(B</P>
<H2><A NAME="ss7.2">7.2</A> <A HREF="Lex-YACC-HOWTO.html#toc7.2">$B%3%s%U%j%/%H(B: 'shift/reduce', 'reduce/reduce' </A>
</H2>
<P>YACC $B$,%3%s%U%j%/%H$K$D$$$F7Y9p$r=P$9;~$O!"2?$+LdBj$,$"$k;~$G$7$g$&!#(B
$B%3%s%U%j%/%H$r2r7h$9$k:n6H$K$O!"$H$-$K?&?M7]$N$h$&$JFC<l$5$,$"$j!"$"$J(B
$B$?$N;HMQ$7$F$$$k8@8l$K$D$$$FB?$/$N$3$H$r65$($F$/$l$k$3$H$G$7$g$&(B - $B$=(B
$B$l$b$"$J$?$,CN$j$?$+$C$?$3$H0J>e$N$3$H$r!#(B</P>
<P>$BLdBj$O!"O"B3$9$k%H!<%/%s$r$I$&2r<a$9$k$+!"$H$$$&E@$rCf?4$K5/$3$j$^$9!#(B
$B0J2<$NFs$D$N%3%^%s%I$r<u$1IU$1$kI,MW$,$"$k8@8l$r!"Dj5A$9$k$H$7$^$7$g$&!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<PRE>
delete heater all
delete heater number1
</PRE>
</CODE></BLOCKQUOTE>
</P>
<P>$B$3$l$r$9$k$K$O!"0J2<$NJ8K!Dj5A$,I,MW$G$9!#(B</P>
<P>
<BLOCKQUOTE><CODE>
<PRE>
delete_heaters:
TOKDELETE TOKHEATER mode
{
deleteheaters($3);
}
mode: WORD
delete_a_heater:
TOKDELETE TOKHEATER WORD
{
delete($3);
}
</PRE>
</CODE></BLOCKQUOTE>
</P>
<P>$B$b$&LdBj$N=-$$$,$7$F$-$^$7$?$M!#%9%F!<%H%^%7%s$O(B 'delete' $B$H$$$&C18l$r(B
$BFI$`$3$H$+$i;O$a$F!"<!$N%H!<%/%s$,2?$G$"$k$+$K$h$C$F!"A+0\@h$r7hDj$9$k(B
$BI,MW$,$"$j$^$9!#<!$N%H!<%/%s$H$$$&$N$O!"%R!<%?!<$N:o=|J}K!$r;XDj$9$k%b!<(B
$B%I!"$b$7$/$O:o=|$9$Y$-%R!<%?!<$NL>A0$G$9!#(B</P>
<P>$BLdBj$ON>J}$N%3%^%s%I$K$H$C$F!"<!$N%H!<%/%s$,(B WORD $B$K$J$k$H$$$&$3$H$G$9!#(B
YACC $B$O!"$3$N>l9g$I$&$7$FNI$$$+$o$+$j$^$;$s!#$3$l$,(B 'reduce/reduce'$B!"(B
$B99$K$O(B 'delete_a_heater' $B%N!<%I$K7h$7$FC#$9$k$3$H$,$J$$!"$H$$$&7Y9p$K(B
$B$J$j$^$9!#(B</P>
<P>$B$3$N>l9g$N%3%s%U%j%/%H$O!"4JC1$K2r7h$G$-$^$9$,!J:G=i$N%3%^%s%IL>$r(B'
delete heaters all' $B$KJQ99$7$?$j!"(B'all' $B$rFHN)$7$?%H!<%/%s$H$7$FDj5A$9(B
$B$k$J$I!K!"$b$C$HJ#;($K$J$k$3$H$b$"$j$^$9!#(B--verbose $B%U%i%0$r(B
$BIU2C$7$F(Byacc$B$rDL$9$H@8@.$5$l$k(B y.output $B%U%!%$%k$O!"$=$s$J;~$KHs>o$K=u(B
$B$1$H$J$j$^$9!#(B</P>
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