/** The location of its first occurrence. */
location location;
- /** Its %type and associated printer and destructor. */
+ /** Its \c \%type. */
uniqstr type_name;
+ /** Its \c \%type's location. */
location type_location;
- /** Does not own the memory. */
+ /** Any \c \%destructor declared specifically for this symbol.
+
+ Access this field only through <tt>symbol</tt>'s interface functions. For
+ example, if <tt>symbol::destructor = NULL</tt>, the default
+ \c \%destructor or a per-type \c \%destructor might be appropriate, and
+ \c symbol_destructor_get will compute the correct one. */
const char *destructor;
+
+ /** The location of \c symbol::destructor.
+
+ Access this field only through <tt>symbol</tt>'s interface functions.
+ \sa symbol::destructor */
location destructor_location;
- /** Printer. */
+ /** Any \c \%printer declared specifically for this symbol.
+
+ Access this field only through <tt>symbol</tt>'s interface functions.
+ \sa symbol::destructor */
const char *printer;
+
+ /** The location of \c symbol::printer.
+
+ Access this field only through <tt>symbol</tt>'s interface functions.
+ \sa symbol::destructor */
location printer_location;
symbol_number number;
bool declared;
};
-
/** Undefined user number. */
#define USER_NUMBER_UNDEFINED -1
Its name cannot conflict with the user's names. */
symbol *dummy_symbol_get (location loc);
+/** Is this a dummy nonterminal? */
+bool symbol_is_dummy (const symbol *sym);
+
/** Declare the new symbol \c sym. Make it an alias of \c symval. */
void symbol_make_alias (symbol *sym, symbol *symval, location loc);
/** Set the \c destructor associated with \c sym. */
void symbol_destructor_set (symbol *sym, const char *destructor, location loc);
+/** Get the computed \c \%destructor for \c sym, or \c NULL if none. */
+const char *symbol_destructor_get (symbol *sym);
+
+/** Get the grammar location of the computed \c \%destructor for \c sym.
+
+ \pre <tt>symbol_destructor_get (sym) != NULL</tt> */
+location symbol_destructor_location_get (symbol *sym);
+
/** Set the \c printer associated with \c sym. */
void symbol_printer_set (symbol *sym, const char *printer, location loc);
+/** Get the computed \c \%printer for \c sym, or \c NULL if none. */
+const char *symbol_printer_get (symbol *sym);
+
+/** Get the grammar location of the computed \c \%printer for \c sym.
+
+ \pre <tt>symbol_printer_get (sym) != NULL</tt> */
+location symbol_printer_location_get (symbol *sym);
+
/* Set the \c precedence associated with \c sym.
Ensure that \a symbol is a terminal.
/** The user start symbol. */
extern symbol *startsymbol;
-/** The location of the \c %start declaration. */
+/** The location of the \c \%start declaration. */
extern location startsymbol_location;
-/*---------------.
-| Symbol table. |
-`---------------*/
+/*-----------------.
+| Semantic types. |
+`-----------------*/
+/** A semantic type and its associated \c \%destructor and \c \%printer.
+
+ Access the fields of this struct only through the interface functions in
+ this file. \sa symbol::destructor */
+typedef struct semantic_type {
+ /** The key, name of the semantic type. */
+ uniqstr tag;
-/** Create the symbol table. */
+ /** Any \c %destructor declared for this semantic type. */
+ const char *destructor;
+ /** The location of \c semantic_type::destructor. */
+ location destructor_location;
+
+ /** Any \c %printer declared for this semantic type. */
+ const char *printer;
+ /** The location of \c semantic_type::printer. */
+ location printer_location;
+} semantic_type;
+
+/** Fetch (or create) the semantic type associated to KEY. */
+semantic_type *semantic_type_from_uniqstr (const uniqstr key);
+
+/** Fetch (or create) the semantic type associated to KEY. */
+semantic_type *semantic_type_get (const char *key);
+
+/** Set the \c destructor associated with \c type. */
+void semantic_type_destructor_set (semantic_type *type, const char *destructor,
+ location loc);
+
+/** Set the \c printer associated with \c type. */
+void semantic_type_printer_set (semantic_type *type, const char *printer,
+ location loc);
+
+/*----------------------------------.
+| Symbol and semantic type tables. |
+`----------------------------------*/
+
+/** Create the symbol and semantic type tables. */
void symbols_new (void);
-/** Free all the memory allocated for symbols. */
+/** Free all the memory allocated for symbols and semantic types. */
void symbols_free (void);
/** Check that all the symbols are defined.
#token_translations. */
void symbols_pack (void);
+
+/*-----------------------------------.
+| Default %destructor and %printer. |
+`-----------------------------------*/
+
+/** Set the default \c \%destructor. */
+void default_destructor_set (const char *destructor, location loc);
+
+/** Set the default \c \%printer. */
+void default_printer_set (const char *printer, location loc);
+
#endif /* !SYMTAB_H_ */