-void grammar_start_symbol_set PARAMS ((symbol_t *s, location_t l));
-void prologue_augment PARAMS ((const char *prologue, location_t location));
-void epilogue_set PARAMS ((const char *epilogue, location_t location));
-void grammar_symbol_append PARAMS ((symbol_t *s, location_t l));
-void grammar_rule_begin PARAMS ((symbol_t *lhs, location_t l));
-void grammar_rule_end PARAMS ((location_t l));
-void grammar_midrule_action PARAMS ((void));
-void grammar_current_rule_prec_set PARAMS ((symbol_t *precsym));
-void grammar_current_rule_symbol_append PARAMS ((symbol_t *symbol,
- location_t l));
-void grammar_current_rule_action_append PARAMS ((const char *action,
- location_t l));
-extern symbol_list_t *current_rule;
-void reader PARAMS ((void));
-extern int typed;
+void grammar_start_symbol_set (symbol *sym, location loc);
+void prologue_augment (const char *prologue, location loc);
+void grammar_symbol_append (symbol *sym, location loc);
+void grammar_rule_begin (symbol *lhs, location loc);
+void grammar_rule_end (location loc);
+void grammar_midrule_action (void);
+void grammar_current_rule_prec_set (symbol *precsym, location loc);
+void grammar_current_rule_dprec_set (int dprec, location loc);
+void grammar_current_rule_merge_set (uniqstr name, location loc);
+
+void grammar_current_rule_symbol_append (symbol *sym, location loc);
+void grammar_current_rule_action_append (const char *action, location loc);
+extern symbol_list *current_rule;
+void reader (void);
+void free_merger_functions (void);
+
+extern merger_list *merge_functions;
+
+extern bool typed;
+extern bool default_prec;