-
-struct expression *expr_parse (struct dictionary *, enum expr_type);
-struct expression *expr_parse_pool (struct pool *,
- struct dictionary *, enum expr_type);
+struct dataset ;
+struct lexer ;
+
+struct expression *expr_parse (struct lexer *lexer, struct dataset *, enum expr_type);
+struct expression *expr_parse_pool (struct lexer *,
+ struct pool *,
+ struct dataset *,
+ enum expr_type);