src/location.h: #include "system.h" rather than <stdbool.h>.

[bison.git] / src / symlist.h

diff --git a/src/symlist.h b/src/symlist.h
index aea5c144de9ec5a399d46655bbf0a54488d2ee14..0423d016d12046ae000292261752fc65c78f8744 100644 (file)
--- a/src/symlist.h
+++ b/src/symlist.h
@@ -1,6 +1,6 @@
 /* Lists of symbols for Bison
 
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2005 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -25,38 +25,59 @@
 # include "location.h"
 # include "symtab.h"
 
+/* A list of symbols, used during the parsing to store the rules.  */
 typedef struct symbol_list
 {
-  struct symbol_list *next;
+  /* The symbol.  */
   symbol *sym;
   location location;
 
+  /* If this symbol is the generated lhs for a mid-rule, a pointer to
+     that mid-rule.  */
+  struct symbol_list *midrule;
+
   /* The action is attached to the LHS of a rule. */
   const char *action;
   location action_location;
 
+  /* Whether this symbol's value is used in the current action. */
+  bool used;
+
+  /* Precedence/associativity.  */
   symbol *ruleprec;
   int dprec;
   int merger;
+
+  /* The list.  */
+  struct symbol_list *next;
 } symbol_list;
 
 
 /* Create a list containing SYM at LOC.  */
 symbol_list *symbol_list_new (symbol *sym, location loc);
 
+/* Print it.  */
+void symbol_list_print (const symbol_list *l, FILE *f);
+
 /* Prepend SYM at LOC to the LIST.  */
-symbol_list *symbol_list_prepend (symbol_list *list,
+symbol_list *symbol_list_prepend (symbol_list *l,
                                  symbol *sym,
                                  location loc);
 
 /* Free the LIST, but not the symbols it contains.  */
-void symbol_list_free (symbol_list *list);
+void symbol_list_free (symbol_list *l);
 
 /* Return its length. */
-unsigned int symbol_list_length (symbol_list *list);
+unsigned int symbol_list_length (const symbol_list *l);
+
+/* Get symbol N in symbol list L.  */
+symbol_list *symbol_list_n_get (symbol_list *l, int n);
 
 /* Get the data type (alternative in the union) of the value for
    symbol N in rule RULE.  */
-uniqstr symbol_list_n_type_name_get (symbol_list *rp, location loc, int n);
+uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
+
+/* The symbol N in symbol list L is USED.  */
+void symbol_list_n_used_set (symbol_list *l, int n, bool used);
 
 #endif /* !SYMLIST_H_ */