9 %token STRUCT END METHOD VAR IF THEN ELSE WHILE DO RETURN NOT OR THIS IDENT NUM ASSIGN
12 @i xx = @Statement.sin@;
16 @i @Statement.sout@ = @Statement.sin@;
18 *> xxputsin(@Statement.sout@,)
19 * geht nicht, weil verschachtelte macros deaktiviert sind */
23 @attributes { char *name; } IDENT
24 @attributes { struct symbol *f; } FeldID Parms Structdef Program
25 @attributes { struct symbol *s; } Methoddef Statseq Lexpr Expr Minusterm Multerm Orterm Term Exprs Feld
26 @attributes { struct symbol *sin; struct symbol *sout; } Statement
28 @traversal @postorder c
34 @i @Program.f@ = tab_new();
41 @i @Methoddef.s@ = @Program.0.f@;
42 @i @Program.1.f@ = @Program.0.f@;
45 | Structdef ';' Program
47 @i @Program.1.f@ = tab_merge(@Program.0.f@, @Structdef.f@, 1);
53 METHOD IDENT '(' Parms ')' Statseq END
55 @i @Statseq.s@ = tab_merge(@Methoddef.s@, @Parms.f@, 0);
62 @i @Structdef.f@ = @FeldID.f@;
67 /* lokale Vars werden in Statement in die tabelle eingefuegt */
70 @i @Parms.0.f@ = tab_add_symbol(@Parms.1.f@, @IDENT.name@, S_VAR, 1);
75 @i @Parms.f@ = tab_new();
82 @i @FeldID.0.f@ = tab_add_symbol(@FeldID.1.f@, @IDENT.name@, S_FIELD, 1);
87 @i @FeldID.f@ = tab_new();
94 @i @Statement.sin@ = @Statseq.0.s@;
95 @i @Statseq.1.s@ = @Statement.sout@;
109 | VAR IDENT ASSIGN Expr
111 /* tab_clone ist hier noetig, vgl. folgendes statement
112 * > var x := x - 1; */
113 @i @Statement.sout@ = tab_add_symbol(tab_clone(@Statement.sin@), @IDENT.name@, S_VAR, 1);
123 | IF Expr THEN Statseq END
127 xxputsin(@Statseq.s@,)
130 | IF Expr THEN Statseq ELSE Statseq END
134 xxputsin(@Statseq.0.s@,)
135 xxputsin(@Statseq.1.s@,)
138 | WHILE Expr DO Statseq END
142 xxputsin(@Statseq.s@,)
155 @c check(@Lexpr.s@, @IDENT.name@, S_VAR);
163 @c check(@Feld.s@, @IDENT.name@, S_FIELD);
199 @c check(@Term.s@, @IDENT.name@, S_VAR);
203 | IDENT '(' Exprs ')'
204 | Term '.' IDENT '(' Exprs ')'
217 int yyerror(char *error_text)
219 fprintf(stderr,"Zeile %i: %s\n", yylineno, error_text);
223 int main(int argc, char **argv)