symbol_t *res = XMALLOC (symbol_t, 1);
res->tag = xstrdup (tag);
- res->type_name = NULL;
res->location = location;
+
+ res->type_name = NULL;
+ res->destructor = NULL;
+ res->printer = NULL;
+
res->number = NUMBER_UNDEFINED;
res->prec = 0;
res->assoc = right_assoc;
res->user_token_number = USER_NUMBER_UNDEFINED;
+
res->alias = NULL;
res->class = unknown_sym;
}
-/*-----------------------------------------------------------------.
-| Return the tag of this SYMBOL in a printable form. Warning: use |
-| the first QUOTEARG slot: 0. |
-`-----------------------------------------------------------------*/
-
-const char *
-symbol_tag_get (symbol_t *symbol)
-{
- return quotearg_style (escape_quoting_style, symbol->tag);
-}
-
-
-/*------------------------------------------------------------.
-| Return the tag of this SYMBOL in a printable form. Use the |
-| QUOTEARG slot number N. |
-`------------------------------------------------------------*/
+/*------------------------------------------------------------------.
+| Set the TYPE_NAME associated to SYMBOL. Does nothing if passed 0 |
+| as TYPE_NAME. |
+`------------------------------------------------------------------*/
-const char *
-symbol_tag_get_n (symbol_t *symbol, int n)
+void
+symbol_type_set (symbol_t *symbol, char *type_name, location_t location)
{
- return quotearg_n_style (n, escape_quoting_style, symbol->tag);
+ if (type_name)
+ {
+ if (symbol->type_name)
+ complain_at (location,
+ _("type redeclaration for %s"), symbol->tag);
+ symbol->type_name = type_name;
+ }
}
-/*-------------------------------.
-| Print the tag of this SYMBOL. |
-`-------------------------------*/
+/*-------------------------------------------------------------------.
+| Set the DESTRUCTOR associated to SYMBOL. Do nothing if passed 0. |
+`-------------------------------------------------------------------*/
void
-symbol_tag_print (symbol_t *symbol, FILE *out)
+symbol_destructor_set (symbol_t *symbol, char *destructor, location_t location)
{
- fputs (symbol_tag_get (symbol), out);
+ if (destructor)
+ {
+ if (symbol->destructor)
+ complain_at (location,
+ _("%s redeclaration for %s"),
+ "%destructor", symbol->tag);
+ symbol->destructor = destructor;
+ symbol->destructor_location = location;
+ }
}
-/*------------------------------------------------------------------.
-| Set the TYPE_NAME associated to SYMBOL. Does nothing if passed 0 |
-| as TYPE_NAME. |
-`------------------------------------------------------------------*/
+/*----------------------------------------------------------------.
+| Set the PRITNER associated to SYMBOL. Do nothing if passed 0. |
+`----------------------------------------------------------------*/
void
-symbol_type_set (symbol_t *symbol, location_t location, char *type_name)
+symbol_printer_set (symbol_t *symbol, char *printer, location_t location)
{
- if (type_name)
+ if (printer)
{
- if (symbol->type_name)
+ if (symbol->printer)
complain_at (location,
- _("type redeclaration for %s"), symbol_tag_get (symbol));
- symbol->type_name = type_name;
+ _("%s redeclaration for %s"),
+ "%printer", symbol->tag);
+ symbol->printer = printer;
+ symbol->printer_location = location;
}
}
`------------------------------------------------------------------*/
void
-symbol_precedence_set (symbol_t *symbol, location_t location,
- int prec, associativity assoc)
+symbol_precedence_set (symbol_t *symbol,
+ int prec, associativity assoc, location_t location)
{
if (assoc != undef_assoc)
{
if (symbol->prec != 0)
complain_at (location,
_("redefining precedence of %s"),
- symbol_tag_get (symbol));
+ symbol->tag);
symbol->prec = prec;
symbol->assoc = assoc;
}
/* Only terminals have a precedence. */
- symbol_class_set (symbol, token_sym);
+ symbol_class_set (symbol, token_sym, location);
}
`-------------------------------------*/
void
-symbol_class_set (symbol_t *symbol, symbol_class class)
+symbol_class_set (symbol_t *symbol, symbol_class class, location_t location)
{
if (symbol->class != unknown_sym && symbol->class != class)
- complain (_("symbol %s redefined"), symbol_tag_get (symbol));
+ complain_at (location, _("symbol %s redefined"), symbol->tag);
if (class == nterm_sym && symbol->class != nterm_sym)
symbol->number = nvars++;
`-------------------------------------------------*/
void
-symbol_user_token_number_set (symbol_t *symbol, int user_token_number)
+symbol_user_token_number_set (symbol_t *symbol,
+ int user_token_number, location_t location)
{
assert (symbol->class == token_sym);
if (symbol->user_token_number != USER_NUMBER_UNDEFINED
&& symbol->user_token_number != user_token_number)
- complain (_("redefining user token number of %s"),
- symbol_tag_get (symbol));
+ complain_at (location, _("redefining user token number of %s"),
+ symbol->tag);
symbol->user_token_number = user_token_number;
/* User defined EOF token? */
complain_at
(this->location,
_("symbol %s is used, but is not defined as a token and has no rules"),
- symbol_tag_get (this));
+ this->tag);
this->class = nterm_sym;
this->number = nvars++;
}
{
if (symval->alias)
warn (_("symbol `%s' used more than once as a literal string"),
- symbol_tag_get (symval));
+ symval->tag);
else if (symbol->alias)
warn (_("symbol `%s' given more than one literal string"),
- symbol_tag_get (symbol));
+ symbol->tag);
else
{
symval->class = token_sym;
{
if (this->prec != 0 && this->alias->prec != 0)
complain (_("conflicting precedences for %s and %s"),
- symbol_tag_get (this), symbol_tag_get (this->alias));
+ this->tag, this->alias->tag);
if (this->prec != 0)
this->alias->prec = this->prec;
else
if (this->assoc != right_assoc
&& this->alias->assoc != right_assoc)
complain (_("conflicting associativities for %s and %s"),
- symbol_tag_get (this), symbol_tag_get (this->alias));
+ this->tag, this->alias->tag);
if (this->assoc != 0)
this->alias->assoc = this->assoc;
else
/* A token which translation has already been set? */
if (token_translations[this->user_token_number] != undeftoken->number)
complain (_("tokens %s and %s both assigned number %d"),
- symbol_tag_get (symbols[token_translations[this->user_token_number]]),
- symbol_tag_get (this), this->user_token_number);
+ symbols[token_translations[this->user_token_number]]->tag,
+ this->tag, this->user_token_number);
token_translations[this->user_token_number] = this->number;
}
`----------------------------------------------------------------*/
symbol_t *
-getsym (const char *key, location_t location)
+symbol_get (const char *key, location_t location)
{
symbol_t probe;
symbol_t *entry;
+ /* Keep the symbol in a printable form. */
+ key = quotearg_style (escape_quoting_style, key);
(const char *) probe.tag = key;
entry = hash_lookup (symbol_table, &probe);
}
+/*------------------------------------------------------------------.
+| Generate a dummy nonterminal, whose name cannot conflict with the |
+| user's names. |
+`------------------------------------------------------------------*/
+
+symbol_t *
+dummy_symbol_get (location_t location)
+{
+ /* Incremented for each generated symbol. */
+ static int dummy_count = 0;
+ static char buf[256];
+
+ symbol_t *sym;
+
+ sprintf (buf, "@%d", ++dummy_count);
+ sym = symbol_get (buf, location);
+ sym->class = nterm_sym;
+ sym->number = nvars++;
+ return sym;
+}
+
+
/*-------------------.
| Free the symbols. |
`-------------------*/
symbols_free (void)
{
hash_free (symbol_table);
+ free (symbols);
}
if (startsymbol->class == unknown_sym)
fatal_at (startsymbol_location,
_("the start symbol %s is undefined"),
- symbol_tag_get (startsymbol));
+ startsymbol->tag);
else if (startsymbol->class == token_sym)
fatal_at (startsymbol_location,
_("the start symbol %s is a token"),
- symbol_tag_get (startsymbol));
+ startsymbol->tag);
}
projects / bison.git / blobdiff