Re: lex/yacc/gcc help

[Akim Demaille]

Le 1 nov. 2013 à 14:36, Mark Hounschell <address@hidden> a écrit :

> # make
> ./translate5 cpu.def
> cat yacc1.yinit yacctoks yacc2.yinit yaccrules yacc3.yinit > yacc.in
> yacc -d yacc.in
> cat lex1.linit lextext lexfield lex2.linit > lex.in
> flex -l lex.in
> gcc -ansi -w   y.tab.c -o cpu.asm -lgcc
> yacc.in: In function ëyyparseí:
> yacc.in:2322:3: error: unknown type name ëBEGINí

BEGIN is something expected in a lex file, not in a Yacc
file.  This is fishy.

> case 207:
> # line 2305 "yacc.in"
> { if (yychar != -1) {
>                        yyclearin;
>                        while (yyleng > 0) {
>                                unput(yytext[--yyleng]); }}
>                 BEGIN ctxn;} break;

It looks like your Yacc parser is trying to influence your
lex scanner.  In a properly designed scanner/parser couple,
you should never see things such as "BEGIN" or "unput" in
the parser: that's the scanner's job only.

Either be brave and change all this, or maybe there is a way
out, I don't know, by trying to #include the whole scanner in
the yacc file.  In either case, expect pain :(