9 %token STRUCT END METHOD VAR IF THEN ELSE WHILE DO RETURN NOT OR THIS
10 %token IDENT NUM ASSIGN
13 @i xx = @Statement.sin@;
17 @i @Statement.sout@ = @Statement.sin@;
19 *> xxputsin(@Statement.sout@,)
20 * geht nicht, weil verschachtelte macros deaktiviert sind */
26 @attributes { char *name; } IDENT
27 @attributes { struct symbol *f; struct symbol *s; } Program
28 @attributes { struct symbol *f; } Idents Structdef Parms
29 @attributes { struct symbol *s; } Methoddef Statseq Lexpr Expr Minusterm Multerm Orterm
31 @attributes { struct symbol *sin; struct symbol *sout; } Statement
33 @traversal @postorder c
39 @i @Program.s@ = @Program.f@;
46 @i @Program.0.f@ = @Program.1.f@;
49 | Structdef ';' Program
51 @i @Program.0.f@ = tab_merge(@Structdef.f@, @Program.1.f@, 1);
56 @i @Program.0.f@ = new_tab();
61 METHOD IDENT '(' Parms ')' Statseq END
63 @i @Statseq.s@ = tab_merge(@Methoddef.s@, @Parms.f@, 0);
70 @i @Structdef.f@ = @Idents.f@;
75 /* lokale Vars werden in Statement in die tabelle eingefuegt */
78 @i @Parms.0.f@ = tab_add_symbol(@Parms.1.f@, @IDENT.name@, S_VAR, 1);
83 @i @Parms.f@ = new_tab();
90 @i @Idents.0.f@ = tab_add_symbol(@Idents.1.f@, @IDENT.name@, S_FIELD, 1);
95 @i @Idents.f@ = new_tab();
100 Statement ';' Statseq
102 @i @Statement.sin@ = @Statseq.0.s@;
103 @i @Statseq.1.s@ = @Statement.sout@;
117 | VAR IDENT ASSIGN Expr
119 @i @Statement.sout@ = tab_add_symbol(clone_tab(@Statement.sin@), @IDENT.name@, S_VAR, 1);
129 | IF Expr THEN Statseq END
133 xxputsin(@Statseq.s@,)
136 | IF Expr THEN Statseq ELSE Statseq END
140 xxputsin(@Statseq.0.s@,)
141 xxputsin(@Statseq.1.s@,)
144 | WHILE Expr DO Statseq END
148 xxputsin(@Statseq.s@,)
161 @c check(@Lexpr.s@, @IDENT.name@, S_VAR);
169 @c check(@Feld.s@, @IDENT.name@, S_FIELD);
205 @c check(@Term.s@, @IDENT.name@, S_VAR);
209 | IDENT '(' Exprs ')'
210 | Term '.' IDENT '(' Exprs ')'
223 int yyerror(char *error_text)
225 fprintf(stderr,"Zeile %i: %s\n", yylineno, error_text);
229 int main(int argc, char **argv)