virtual void lex_ ();
virtual void error_ ();
virtual void print_ ();
+ virtual void report_syntax_error_ ();
/* Stacks. */
StateStack state_stack_;
static const ]b4_int_type_for([b4_rline])[ rline_[];
static const ]b4_int_type_for([b4_stos])[ stos_[];
static const ]b4_int_type_for([b4_toknum])[ token_number_[];
+ virtual void reduce_print_ (int yyrule);
+ virtual void stack_print_ ();
#endif
/* Even more tables. */
int len_;
int state_;
+ /* Error handling. */
+ int nerrs_;
+ int errstatus_;
+
/* Debugging. */
int debug_;
std::ostream &cdebug_;
/* Enable debugging if requested. */
#if YYDEBUG
# define YYCDEBUG if (debug_) cdebug_
+# define YY_REDUCE_PRINT(Rule) \
+do { \
+ if (debug_) \
+ reduce_print_ (Rule); \
+} while (0)
+# define YY_STACK_PRINT() \
+do { \
+ if (debug_) \
+ stack_print_ (); \
+} while (0)
#else /* !YYDEBUG */
# define YYCDEBUG if (0) cdebug_
+# define YY_REDUCE_PRINT(Rule)
+# define YY_STACK_PRINT()
#endif /* !YYDEBUG */
#define YYACCEPT goto yyacceptlab
#define YYABORT goto yyabortlab
-#define YYERROR goto yyerrlab1
+#define YYERROR goto yyerrorlab
int
yy::]b4_parser_class_name[::parse ()
{
- int nerrs = 0;
- int errstatus = 0;
+ nerrs_ = 0;
+ errstatus_ = 0;
/* Initialize the stacks. The initial state will be pushed in
yynewstate, since the latter expects the semantical and the
#endif
}
+ /* If the proper action on seeing token YYTOKEN is to reduce or to
+ detect an error, take that action. */
n_ += ilooka_;
if (n_ < 0 || last_ < n_ || check_[n_] != ilooka_)
goto yydefault;
/* Count tokens shifted since error; after three, turn off error
status. */
- if (errstatus)
- --errstatus;
+ if (errstatus_)
+ --errstatus_;
state_ = n_;
goto yynewstate;
- /* Default action. */
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state. |
+`-----------------------------------------------------------*/
yydefault:
n_ = defact_[state_];
if (n_ == 0)
goto yyerrlab;
goto yyreduce;
- /* Reduce. */
+/*-----------------------------.
+| yyreduce -- Do a reduction. |
+`-----------------------------*/
yyreduce:
len_ = r2_[n_];
+ /* If LEN_ is nonzero, implement the default value of the action:
+ `$$ = $1'. Otherwise, use the top of the stack.
+
+ Otherwise, the following line sets YYVAL to garbage.
+ This behavior is undocumented and Bison
+ users should not rely upon it. */
if (len_)
{
yyval = semantic_stack_[len_ - 1];
yyloc = location_stack_[0];
}
-#if YYDEBUG
- if (debug_)
- {
- // Short files will use "unsigned char" for line numbers,
- // in which case they will be output as character litterals
- // by "<<".
- unsigned yylno = rline_[n_];
- YYCDEBUG << "Reducing via rule " << n_ - 1
- << " (line " << yylno << "), ";
- for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_];
- 0 <= rhs_[i]; ++i)
- YYCDEBUG << name_[rhs_[i]] << ' ';
- YYCDEBUG << "-> " << name_[r1_[n_]] << std::endl;
- }
-#endif
-
if (len_)
{
Slice< LocationType, LocationStack > slice (location_stack_, len_);
YYLLOC_DEFAULT (yyloc, slice, len_);
}
-
+ YY_REDUCE_PRINT (n_);
switch (n_)
{
]b4_actions[
semantic_stack_.pop (len_);
location_stack_.pop (len_);
-#if YYDEBUG
- if (debug_)
- {
- YYCDEBUG << "state stack now";
- for (StateStack::ConstIterator i = state_stack_.begin ();
- i != state_stack_.end (); ++i)
- YYCDEBUG << ' ' << *i;
- YYCDEBUG << std::endl;
- }
-#endif
+ YY_STACK_PRINT ();
semantic_stack_.push (yyval);
location_stack_.push (yyloc);
state_ = defgoto_[n_ - ntokens_];
goto yynewstate;
- /* Report and recover from errors. This is very incomplete. */
+/*------------------------------------.
+| yyerrlab -- here on detecting error |
+`------------------------------------*/
yyerrlab:
/* If not already recovering from an error, report this error. */
- if (!errstatus)
- {
- ++nerrs;
-
-#if YYERROR_VERBOSE
- n_ = pact_[state_];
- if (pact_ninf_ < n_ && n_ < last_)
- {
- message = "syntax error, unexpected ";
- message += name_[ilooka_];
- {
- int count = 0;
- /* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
- int xbegin = n_ < 0 ? -n_ : 0;
- /* Stay within bounds of both yycheck and yytname. */
- int checklim = last_ - n_;
- int xend = checklim < ntokens_ ? checklim : ntokens_;
- for (int x = xbegin; x < xend; ++x)
- if (check_[x + n_] == x && x != terror_)
- ++count;
- if (count < 5)
- {
- count = 0;
- for (int x1 = xbegin; x1 < xend; ++x1)
- if (check_[x1 + n_] == x1 && x1 != terror_)
- {
- message += (!count++) ? ", expecting " : " or ";
- message += name_[x1];
- }
- }
- }
- }
- else
-#endif
- message = "syntax error";
- error_ ();
- }
- goto yyerrlab1;
-
+ report_syntax_error_ ();
- /*----------------------------------------------------.
- | yyerrlab1 -- error raised explicitly by an action. |
- `----------------------------------------------------*/
- yyerrlab1:
- if (errstatus == 3)
+ if (errstatus_ == 3)
{
/* If just tried and failed to reuse lookahead token after an
error, discard it. */
/* Return failure if at end of input. */
- if (looka_ == eof_)
- goto yyabortlab;
+ if (looka_ <= eof_)
+ {
+ /* If at end of input, pop the error token,
+ then the rest of the stack, then return failure. */
+ if (looka_ == eof_)
+ for (;;)
+ {
+ state_stack_.pop ();
+ semantic_stack_.pop ();
+ location_stack_.pop ();
+ if (state_stack_.height () == 1)
+ YYABORT;
+// YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
+// FIXME: yydestruct (yystos[*yyssp], yyvsp]b4_location_if([, yylsp])[);
+ }
+ }
+ else
+ {
#if YYDEBUG
- YYCDEBUG << "Discarding token " << looka_
- << " (" << name_[ilooka_] << ")." << std::endl;
+ YYCDEBUG << "Discarding token " << looka_
+ << " (" << name_[ilooka_] << ")." << std::endl;
+// yydestruct (yytoken, &yylval]b4_location_if([, &yylloc])[);
#endif
- looka_ = empty_;
+ looka_ = empty_;
+ }
}
/* Else will try to reuse lookahead token after shifting the error
token. */
+ goto yyerrlab1;
+
+
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR. |
+`---------------------------------------------------*/
+yyerrorlab:
+
+#ifdef __GNUC__
+ /* Pacify GCC when the user code never invokes YYERROR and the label
+ yyerrorlab therefore never appears in user code. */
+ if (0)
+ goto yyerrorlab;
+#endif
+
+ state_stack_.pop (len_);
+ semantic_stack_.pop (len_);
+ location_stack_.pop (len_);
+ state_ = state_stack_[0];
+ goto yyerrlab1;
- errstatus = 3;
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR. |
+`-------------------------------------------------------------*/
+yyerrlab1:
+ errstatus_ = 3; /* Each real token shifted decrements this. */
for (;;)
{
/* Pop the current state because it cannot handle the error token. */
if (state_stack_.height () == 1)
- goto yyabortlab;
+ YYABORT;
#if YYDEBUG
if (debug_)
}
#endif
- state_ = (state_stack_.pop (), state_stack_[0]);
+ state_stack_.pop ();
semantic_stack_.pop ();
- location_stack_.pop ();;
-
-#if YYDEBUG
- if (debug_)
- {
- YYCDEBUG << "Error: state stack now";
- for (StateStack::ConstIterator i = state_stack_.begin ();
- i != state_stack_.end (); ++i)
- YYCDEBUG << ' ' << *i;
- YYCDEBUG << std::endl;
- }
-#endif
+ location_stack_.pop ();
+ state_ = state_stack_[0];
+ YY_STACK_PRINT ();
}
if (n_ == final_)
#endif
}
+/** Generate an error message, and invoke yyerror. */
+void
+yy::]b4_parser_class_name[::report_syntax_error_ ()
+{
+ /* If not already recovering from an error, report this error. */
+ if (!errstatus_)
+ {
+ ++nerrs_;
+
+#if YYERROR_VERBOSE
+ n_ = pact_[state_];
+ if (pact_ninf_ < n_ && n_ < last_)
+ {
+ message = "syntax error, unexpected ";
+ message += name_[ilooka_];
+ {
+ int count = 0;
+ for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x)
+ if (check_[x + n_] == x && x != terror_)
+ ++count;
+ if (count < 5)
+ {
+ count = 0;
+ for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x)
+ if (check_[x + n_] == x && x != terror_)
+ {
+ message += (!count++) ? ", expecting " : " or ";
+ message += name_[x];
+ }
+ }
+ }
+ }
+ else
+#endif
+ message = "syntax error";
+ error_ ();
+ }
+}
+
+
/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
STATE-NUM. */
const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::pact_ninf_ = b4_pact_ninf[;
{
]b4_rline[
};
-#endif
+
+/** Print the state stack from its BOTTOM up to its TOP (included). */
+
+void
+yy::]b4_parser_class_name[::stack_print_ ()
+{
+ cdebug_ << "state stack now";
+ for (StateStack::ConstIterator i = state_stack_.begin ();
+ i != state_stack_.end (); ++i)
+ cdebug_ << ' ' << *i;
+ cdebug_ << std::endl;
+}
+
+/** Report that the YYRULE is going to be reduced. */
+
+void
+yy::]b4_parser_class_name[::reduce_print_ (int yyrule)
+{
+ unsigned int yylno = rline_[yyrule];
+ /* Print the symbols being reduced, and their result. */
+ cdebug_ << "Reducing via rule " << n_ - 1 << " (line " << yylno << "), ";
+ for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_];
+ 0 <= rhs_[i]; ++i)
+ cdebug_ << name_[rhs_[i]] << ' ';
+ cdebug_ << "-> " << name_[r1_[n_]] << std::endl;
+}
+#endif // YYDEBUG
/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
yy::]b4_parser_class_name[::TokenNumberType
inline std::ostream&
operator<< (std::ostream& ostr, const Position& pos)
{
- if (pos.filename != "")
+ if (!pos.filename.empty ())
ostr << pos.filename << ':';
return ostr << pos.line << '.' << pos.column;
}
projects / bison.git / blobdiff