X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ffa4ba3aeff61dee4bc4f64ee3abedafe142af31..231ed89af1eaff303a22f72aeb1c2c0cf5e25c21:/src/symlist.h diff --git a/src/symlist.h b/src/symlist.h index 2b901999..6acb982e 100644 --- a/src/symlist.h +++ b/src/symlist.h @@ -1,6 +1,6 @@ /* Lists of symbols for Bison - Copyright (C) 2002, 2005 Free Software Foundation, Inc. + Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -28,8 +28,17 @@ /* A list of symbols, used during the parsing to store the rules. */ typedef struct symbol_list { - /* The symbol. */ - symbol *sym; + /** + * Whether this node contains a symbol, a semantic type, or a + * \c \%symbol-default. + */ + enum { SYMLIST_SYMBOL, SYMLIST_TYPE, SYMLIST_DEFAULT } content_type; + union { + /** The symbol or \c NULL iff node_type = SYMLIST_SYMBOL. */ + symbol *sym; + /** The semantic type iff node_type = SYMLIST_TYPE. */ + uniqstr type_name; + } content; location location; /* If this symbol is the generated lhs for a midrule but this is the rule in @@ -47,44 +56,60 @@ typedef struct symbol_list const char *action; location action_location; - /* Whether this symbol's value is used in the current action. */ + /* Whether this symbol's value is used in the current action. */ bool used; /* Precedence/associativity. */ symbol *ruleprec; int dprec; int merger; + location merger_declaration_location; /* The list. */ struct symbol_list *next; } symbol_list; -/* Create a list containing SYM at LOC. */ -symbol_list *symbol_list_new (symbol *sym, location loc); +/** Create a list containing \c sym at \c loc. */ +symbol_list *symbol_list_sym_new (symbol *sym, location loc); -/* Print it. */ -void symbol_list_print (const symbol_list *l, FILE *f); +/** Create a list containing \c type_name at \c loc. */ +symbol_list *symbol_list_type_new (uniqstr type_name, location loc); -/* Prepend SYM at LOC to the LIST. */ -symbol_list *symbol_list_prepend (symbol_list *l, - symbol *sym, - location loc); +/** Create a list containing a \c \%symbol-default at \c loc. */ +symbol_list *symbol_list_default_new (location loc); -/* Free the LIST, but not the symbols it contains. */ -void symbol_list_free (symbol_list *l); +/** Print this list. -/* Return its length. */ -unsigned int symbol_list_length (const symbol_list *l); + \pre For every node \c n in the list, n->content_type = + SYMLIST_SYMBOL. */ +void symbol_list_syms_print (const symbol_list *l, FILE *f); -/* Get symbol N in symbol list L. */ +/** Prepend \c node to \c list. */ +symbol_list *symbol_list_prepend (symbol_list *list, symbol_list *node); + +/** Free \c list, but not the items it contains. */ +void symbol_list_free (symbol_list *list); + +/** Return the length of \c l. */ +int symbol_list_length (symbol_list const *l); + +/** Get item \c n in symbol list \c 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 *l, location loc, int n); -/* The symbol N in symbol list L is USED. */ +/** The item \c n in symbol list \c l is \c used. */ void symbol_list_n_used_set (symbol_list *l, int n, bool used); +/** Set the \c \%destructor for \c node as \c destructor at \c loc. */ +void symbol_list_destructor_set (symbol_list *node, const char *destructor, + location loc); + +/** Set the \c \%printer for \c node as \c printer at \c loc. */ +void symbol_list_printer_set (symbol_list *node, const char *printer, + location loc); + #endif /* !SYMLIST_H_ */