X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e39214489e3fb6a8c9b2859673c049eab3898f35..3b0ffc7ec1c9f452b48150c5c537b4f2b80cd34e:/src/symlist.h?ds=sidebyside diff --git a/src/symlist.h b/src/symlist.h index c88c0cae..ccd6110b 100644 --- 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. @@ -16,8 +16,8 @@ You should have received a copy of the GNU General Public License along with Bison; see the file COPYING. If not, write to - the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ #ifndef SYMLIST_H_ # define SYMLIST_H_ @@ -25,9 +25,10 @@ # 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; @@ -35,28 +36,44 @@ typedef struct symbol_list 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 (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 (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_ */