X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b37acfe18c54a04afb3093a145fe99668962889d..d0d3313d10a28aa6fe77f158d61b84424aa9b3ce:/src/symlist.h?ds=sidebyside diff --git a/src/symlist.h b/src/symlist.h index 215fdf0a..43936b29 100644 --- a/src/symlist.h +++ b/src/symlist.h @@ -1,37 +1,58 @@ /* Lists of symbols for Bison - Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2002, 2005-2007, 2009-2012 Free Software Foundation, + Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison is free software; you can redistribute it and/or modify + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ + along with this program. If not, see . */ #ifndef SYMLIST_H_ # define SYMLIST_H_ # include "location.h" +# include "scan-code.h" # include "symtab.h" +# include "named-ref.h" /* 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, a \c <*>, or a + * \c <>. + */ + enum { + SYMLIST_SYMBOL, SYMLIST_TYPE, + SYMLIST_DEFAULT_TAGGED, SYMLIST_DEFAULT_TAGLESS + } content_type; + union { + /** + * The symbol or \c NULL iff + * symbol_list::content_type = SYMLIST_SYMBOL. + */ + symbol *sym; + /** + * The semantic type iff symbol_list::content_type = SYMLIST_TYPE. + */ + uniqstr type_name; + } content; location location; + /* Proper location of the symbol, not all the rule */ + location sym_loc; + /* If this symbol is the generated lhs for a midrule but this is the rule in whose rhs it appears, MIDRULE = a pointer to that midrule. */ struct symbol_list *midrule; @@ -43,12 +64,9 @@ typedef struct symbol_list struct symbol_list *midrule_parent_rule; int midrule_parent_rhs_index; - /* 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; + /* The action is attached to the LHS of a rule, but action properties for + * each RHS are also stored here. */ + code_props action_props; /* Precedence/associativity. */ symbol *ruleprec; @@ -56,36 +74,56 @@ typedef struct symbol_list int merger; location merger_declaration_location; + /* Named reference. */ + named_ref *named_ref; + /* 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); + +/** Create a list containing \c type_name at \c loc. */ +symbol_list *symbol_list_type_new (uniqstr type_name, location loc); -/* Print it. */ -void symbol_list_print (const symbol_list *l, FILE *f); +/** Create a list containing a \c <*> at \c loc. */ +symbol_list *symbol_list_default_tagged_new (location loc); +/** Create a list containing a \c <> at \c loc. */ +symbol_list *symbol_list_default_tagless_new (location loc); -/* Prepend SYM at LOC to the LIST. */ -symbol_list *symbol_list_prepend (symbol_list *l, - symbol *sym, - location loc); +/** Print this list. -/* Free the LIST, but not the symbols it contains. */ -void symbol_list_free (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); -/* Return its length. */ +/** 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 symbol N in symbol list 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. */ -void symbol_list_n_used_set (symbol_list *l, int n, bool used); +/* Check whether the node is a border element of a rule. */ +bool symbol_list_null (symbol_list *node); + +/** Set the \c \%destructor for \c node as \c code at \c loc. */ +void symbol_list_destructor_set (symbol_list *node, char const *code, + location loc); + +/** Set the \c \%printer for \c node as \c code at \c loc. */ +void symbol_list_printer_set (symbol_list *node, char const *code, + location loc); #endif /* !SYMLIST_H_ */