* src/reader.h, src/reader.c (symbol_list_new): Export it.

(symbol_list_prepend): New.
* src/parse-gram.y (%union): `list' is a new member.
(symbols.1): New, replaces...
(terms_to_prec.1, nterms_to_type.1): these.
* src/symtab.h, src/symtab.c (symbol_type_set, symbol_precedence_set)
Take a location as additional argument.
Adjust all callers.

src/reader.h

@@ -36,6 +36,10 @@ typedef struct symbol_list
   symbol_t *ruleprec;
 } symbol_list;
 
+symbol_list *symbol_list_new PARAMS ((symbol_t *sym, location_t location));
+symbol_list *symbol_list_prepend PARAMS ((symbol_list *list,
+					  symbol_t *sym, location_t location));
+
 # include "parse-gram.h"
 
 typedef struct gram_control_s