#include "system.h"
+#include "quotearg.h"
#include "hash.h"
#include "complain.h"
#include "symtab.h"
symbol_t *errtoken = NULL;
symbol_t *undeftoken = NULL;
-symbol_t *eoftoken = NULL;
-symbol_t *axiom = NULL;
+symbol_t *endtoken = NULL;
+symbol_t *accept = NULL;
symbol_t *startsymbol = NULL;
+location_t startsymbol_location;
/*---------------------------------.
| Create a new symbol, named TAG. |
`---------------------------------*/
static symbol_t *
-symbol_new (const char *tag)
+symbol_new (const char *tag, location_t location)
{
symbol_t *res = XMALLOC (symbol_t, 1);
res->tag = xstrdup (tag);
+ 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->assoc = undef_assoc;
res->user_token_number = USER_NUMBER_UNDEFINED;
+
res->alias = NULL;
res->class = unknown_sym;
nsyms++;
-
return res;
}
-/*-----------------------------------------.
-| Set the TYPE_NAME associated to SYMBOL. |
-`-----------------------------------------*/
+/*------------------------------------------------------------------.
+| Set the TYPE_NAME associated to SYMBOL. Does nothing if passed 0 |
+| as TYPE_NAME. |
+`------------------------------------------------------------------*/
void
-symbol_type_set (symbol_t *symbol, char *type_name)
+symbol_type_set (symbol_t *symbol, char *type_name, location_t location)
{
- if (symbol->type_name)
- complain (_("type redeclaration for %s"), symbol->tag);
- symbol->type_name = type_name;
+ if (type_name)
+ {
+ if (symbol->type_name)
+ complain_at (location,
+ _("type redeclaration for %s"), symbol->tag);
+ symbol->type_name = type_name;
+ }
}
-/*------------------------------------------.
-| Set the PRECEDENCE associated to SYMBOL. |
-`------------------------------------------*/
+/*-------------------------------------------------------------------.
+| Set the DESTRUCTOR associated to SYMBOL. Do nothing if passed 0. |
+`-------------------------------------------------------------------*/
+
+void
+symbol_destructor_set (symbol_t *symbol, char *destructor, location_t location)
+{
+ if (destructor)
+ {
+ if (symbol->destructor)
+ complain_at (location,
+ _("%s redeclaration for %s"),
+ "%destructor", symbol->tag);
+ symbol->destructor = destructor;
+ symbol->destructor_location = location;
+ }
+}
+
+
+/*----------------------------------------------------------------.
+| Set the PRITNER associated to SYMBOL. Do nothing if passed 0. |
+`----------------------------------------------------------------*/
+
+void
+symbol_printer_set (symbol_t *symbol, char *printer, location_t location)
+{
+ if (printer)
+ {
+ if (symbol->printer)
+ complain_at (location,
+ _("%s redeclaration for %s"),
+ "%printer", symbol->tag);
+ symbol->printer = printer;
+ symbol->printer_location = location;
+ }
+}
+
+
+/*------------------------------------------------------------------.
+| Set the PRECEDENCE associated to SYMBOL. Does nothing if invoked |
+| with UNDEF_ASSOC as ASSOC. |
+`------------------------------------------------------------------*/
void
symbol_precedence_set (symbol_t *symbol,
- int prec, associativity assoc)
+ int prec, assoc_t assoc, location_t location)
{
- if (symbol->prec != 0)
- complain (_("redefining precedence of %s"), symbol->tag);
- symbol->prec = prec;
- symbol->assoc = assoc;
+ if (assoc != undef_assoc)
+ {
+ if (symbol->prec != 0)
+ complain_at (location,
+ _("redefining precedence of %s"),
+ symbol->tag);
+ symbol->prec = prec;
+ symbol->assoc = assoc;
+ }
+
+ /* Only terminals have a precedence. */
+ symbol_class_set (symbol, token_sym, location);
+}
+
+
+/*-------------------------------------.
+| Set the CLASS associated to SYMBOL. |
+`-------------------------------------*/
+
+void
+symbol_class_set (symbol_t *symbol, symbol_class class, location_t location)
+{
+ if (symbol->class != unknown_sym && symbol->class != class)
+ complain_at (location, _("symbol %s redefined"), symbol->tag);
+
+ if (class == nterm_sym && symbol->class != nterm_sym)
+ symbol->number = nvars++;
+ else if (class == token_sym && symbol->number == NUMBER_UNDEFINED)
+ symbol->number = ntokens++;
+
+ symbol->class = class;
+}
+
+
+/*-------------------------------------------------.
+| Set the USER_TOKEN_NUMBER associated to SYMBOL. |
+`-------------------------------------------------*/
+
+void
+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_at (location, _("redefining user token number of %s"),
+ symbol->tag);
+
+ symbol->user_token_number = user_token_number;
+ /* User defined $end token? */
+ if (user_token_number == 0)
+ {
+ endtoken = symbol;
+ endtoken->number = 0;
+ /* It is always mapped to 0, so it was already counted in
+ NTOKENS. */
+ --ntokens;
+ }
}
{
if (this->class == unknown_sym)
{
- complain
- (_("symbol %s is used, but is not defined as a token and has no rules"),
+ complain_at
+ (this->location,
+ _("symbol %s is used, but is not defined as a token and has no rules"),
this->tag);
this->class = nterm_sym;
this->number = nvars++;
`-------------------------------------------------------------------*/
void
-symbol_make_alias (symbol_t *symbol, symbol_t *symval, char *typename)
+symbol_make_alias (symbol_t *symbol, symbol_t *symval, location_t loc)
{
if (symval->alias)
- warn (_("symbol `%s' used more than once as a literal string"),
+ warn_at (loc, _("symbol `%s' used more than once as a literal string"),
symval->tag);
else if (symbol->alias)
- warn (_("symbol `%s' given more than one literal string"),
+ warn_at (loc, _("symbol `%s' given more than one literal string"),
symbol->tag);
else
{
symval->class = token_sym;
- symval->type_name = typename;
symval->user_token_number = symbol->user_token_number;
symbol->user_token_number = USER_NUMBER_ALIAS;
symval->alias = symbol;
if (this->prec != this->alias->prec)
{
if (this->prec != 0 && this->alias->prec != 0)
- complain (_("conflicting precedences for %s and %s"),
- this->tag, this->alias->tag);
+ complain_at (this->alias->location,
+ _("conflicting precedences for %s and %s"),
+ this->tag, this->alias->tag);
if (this->prec != 0)
this->alias->prec = this->prec;
else
if (this->assoc != this->alias->assoc)
{
- if (this->assoc != 0 && this->alias->assoc != 0)
- complain (_("conflicting assoc values for %s and %s"),
- this->tag, this->alias->tag);
- if (this->assoc != 0)
+ if (this->assoc != undef_assoc && this->alias->assoc != undef_assoc)
+ complain_at (this->alias->location,
+ _("conflicting associativities for %s (%s) and %s (%s)"),
+ this->tag, assoc_to_string (this->assoc),
+ this->alias->tag, assoc_to_string (this->alias->assoc));
+ if (this->assoc != undef_assoc)
this->alias->assoc = this->assoc;
else
this->assoc = this->alias->assoc;
prec and assoc fields and make both the same */
if (this->number == NUMBER_UNDEFINED)
{
- if (this == eoftoken || this->alias == eoftoken)
+ if (this == endtoken || this->alias == endtoken)
this->number = this->alias->number = 0;
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"),
- symbols[token_translations[this->user_token_number]]->tag,
- this->tag, this->user_token_number);
+ complain_at (this->location,
+ _("tokens %s and %s both assigned number %d"),
+ 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)
+symbol_get (const char *key, location_t location)
{
symbol_t probe;
symbol_t *entry;
- (const char *) probe.tag = key;
+ /* Keep the symbol in a printable form. */
+ key = quotearg_style (escape_quoting_style, key);
+ *(char const **) &probe.tag = key;
entry = hash_lookup (symbol_table, &probe);
if (!entry)
{
/* First insertion in the hash. */
- entry = symbol_new (key);
+ entry = symbol_new (key, location);
hash_insert (symbol_table, entry);
}
return entry;
}
+/*------------------------------------------------------------------.
+| 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);
}
token_translations = XCALLOC (symbol_number_t, max_user_token_number + 1);
/* Initialize all entries for literal tokens to 2, the internal
- token number for $undefined., which represents all invalid
- inputs. */
+ token number for $undefined, which represents all invalid inputs.
+ */
for (i = 0; i < max_user_token_number + 1; i++)
token_translations[i] = undeftoken->number;
symbols_do (symbol_translation, NULL);
symbols_token_translations_init ();
if (startsymbol->class == unknown_sym)
- fatal (_("the start symbol %s is undefined"), startsymbol->tag);
+ fatal_at (startsymbol_location,
+ _("the start symbol %s is undefined"),
+ startsymbol->tag);
else if (startsymbol->class == token_sym)
- fatal (_("the start symbol %s is a token"), startsymbol->tag);
+ fatal_at (startsymbol_location,
+ _("the start symbol %s is a token"),
+ startsymbol->tag);
}
projects / bison.git / blobdiff