X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9bc0dd679f19b79f7250d2b16563b590a3b032bb..1462fcee1ed295b24f47758b370068aa6304bb41:/data/lalr1.cc?ds=sidebyside
diff --git a/data/lalr1.cc b/data/lalr1.cc
index e6c622c7..86cc7135 100644
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -1,29 +1,28 @@
-m4_divert(-1)
-
# C++ skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.
-# This program 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 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
-
+#
# 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 this program; 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 .
m4_include(b4_pkgdatadir/[c++.m4])
+m4_define([b4_parser_class_name],
+ [b4_percent_define_get([[parser_class_name]])])
+
# The header is mandatory.
b4_defines_if([],
- [m4_fatal(b4_skeleton[: using %defines is mandatory])])
+ [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
# Backward compatibility.
m4_define([b4_location_constructors])
@@ -31,11 +30,11 @@ m4_include(b4_pkgdatadir/[location.cc])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
+m4_divert_push(0)dnl
b4_defines_if(
-[@output @output_header_name@
+[@output(b4_spec_defines_file@)@
b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
- [2002, 2003, 2004, 2005, 2006])
+ [2002-2010])
dnl FIXME: This is wrong, we want computed header guards.
[
/* C++ LALR(1) parser skeleton written by Akim Demaille. */
@@ -43,25 +42,18 @@ dnl FIXME: This is wrong, we want computed header guards.
#ifndef PARSER_HEADER_H
# define PARSER_HEADER_H
+]b4_percent_code_get([[requires]])[
+
#include
#include
#include "stack.hh"
-namespace ]b4_namespace[
-{
+]b4_namespace_open[
class position;
class location;
-}
-
-]m4_ifdef([b4_before_definitions],
-[[/* Copy the %before-definitions blocks. */
-]b4_before_definitions])[]dnl
+]b4_namespace_close[
-[/* Line __line__ of lalr1.cc. */
-]b4_syncline([@oline@], [@ofile@])[
-
-]dnl Include location.hh here: it might depend on headers included above.
-[#include "location.hh"
+#include "location.hh"
/* Enabling traces. */
#ifndef YYDEBUG
@@ -100,8 +92,7 @@ do { \
} while (false)
#endif
-namespace ]b4_namespace[
-{
+]b4_namespace_open[
/// A Bison parser.
class ]b4_parser_class_name[
@@ -111,16 +102,17 @@ namespace ]b4_namespace[
#ifndef YYSTYPE
]m4_ifdef([b4_stype],
[ union semantic_type
-b4_stype
-/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])
- ;],
-[ typedef int semantic_type;])[
+ {
+b4_user_stype
+ };],
+[m4_if(b4_tag_seen_flag, 0,
+[[ typedef int semantic_type;]],
+[[ typedef YYSTYPE semantic_type;]])])[
#else
typedef YYSTYPE semantic_type;
#endif
/// Symbol locations.
- typedef ]b4_location_type[ location_type;
+ typedef ]b4_percent_define_get([[location_type]])[ location_type;
/// Tokens.
struct token
{
@@ -137,6 +129,7 @@ b4_syncline([@oline@], [@ofile@])
/// \returns 0 iff parsing succeeded.
virtual int parse ();
+#if YYDEBUG
/// The current debugging stream.
std::ostream& debug_stream () const;
/// Set the current debugging stream.
@@ -148,6 +141,7 @@ b4_syncline([@oline@], [@ofile@])
debug_level_type debug_level () const;
/// Set the current debugging level.
void set_debug_level (debug_level_type l);
+#endif
private:
/// Report a syntax error.
@@ -158,8 +152,7 @@ b4_syncline([@oline@], [@ofile@])
/// Generate an error message.
/// \param state the state where the error occurred.
/// \param tok the lookahead token.
- virtual std::string yysyntax_error_ (int yystate]dnl
-b4_error_verbose_if([, int tok])[);
+ virtual std::string yysyntax_error_ (int yystate, int tok);
#if YYDEBUG
/// \brief Report a symbol value on the debug stream.
@@ -176,7 +169,7 @@ b4_error_verbose_if([, int tok])[);
virtual void yy_symbol_print_ (int yytype,
const semantic_type* yyvaluep,
const location_type* yylocationp);
-#endif /* ! YYDEBUG */
+#endif
/// State numbers.
@@ -195,6 +188,14 @@ b4_error_verbose_if([, int tok])[);
/// The location stack.
location_stack_type yylocation_stack_;
+ /// Whether the given \c yypact_ value indicates a defaulted state.
+ /// \param yyvalue the value to check
+ static bool yy_pact_value_is_default_ (int yyvalue);
+
+ /// Whether the given \c yytable_ value indicates a syntax error.
+ /// \param yyvalue the value to check
+ static bool yy_table_value_is_error_ (int yyvalue);
+
/// Internal symbol numbers.
typedef ]b4_int_type_for([b4_translate])[ token_number_type;
/* Tables. */
@@ -202,7 +203,7 @@ b4_error_verbose_if([, int tok])[);
static const ]b4_int_type_for([b4_pact])[ yypact_[];
static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
- /// For a state, default rule to reduce.
+ /// For a state, default reduction number.
/// Unless\a yytable_ specifies something else to do.
/// Zero means the default is an error.
static const ]b4_int_type_for([b4_defact])[ yydefact_[];
@@ -231,12 +232,10 @@ b4_error_verbose_if([, int tok])[);
#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
/// For a symbol, its name in clear.
static const char* const yytname_[];
-#endif
+#endif]b4_error_verbose_if([
-#if YYERROR_VERBOSE
/// Convert the symbol name \a n to a form suitable for a diagnostic.
- virtual std::string yytnamerr_ (const char *n);
-#endif
+ static std::string yytnamerr_ (const char *n);])[
#if YYDEBUG
/// A type to store symbol numbers and -1.
@@ -253,6 +252,10 @@ b4_error_verbose_if([, int tok])[);
virtual void yy_reduce_print_ (int r);
/// Print the state stack on the debug stream.
virtual void yystack_print_ ();
+
+ /* Debugging. */
+ int yydebug_;
+ std::ostream* yycdebug_;
#endif
/// Convert a scanner token number \a t to a symbol number.
@@ -283,51 +286,43 @@ b4_error_verbose_if([, int tok])[);
static const int yyntokens_;
static const unsigned int yyuser_token_number_max_;
static const token_number_type yyundef_token_;
-
- /* Debugging. */
- int yydebug_;
- std::ostream* yycdebug_;
-
]b4_parse_param_vars[
};
-}
+]b4_namespace_close[
-]m4_ifset([b4_global_tokens_and_yystype],
+]b4_percent_define_flag_if([[global_tokens_and_yystype]],
[b4_token_defines(b4_tokens)
#ifndef YYSTYPE
/* Redirection for backward compatibility. */
-# define YYSTYPE b4_namespace::b4_parser_class_name::semantic_type
+# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type
#endif
])
-m4_ifdef([b4_after_definitions],
-[[/* Copy the %after-definitions blocks. */
-]b4_after_definitions])[]dnl
+b4_percent_code_get([[provides]])[]dnl
[#endif /* ! defined PARSER_HEADER_H */]
])dnl
-@output @output_parser_name@
+@output(b4_parser_file_name@)@
b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
- [2002, 2003, 2004, 2005, 2006])
+ [2002-2010])
+b4_percent_code_get([[top]])[]dnl
m4_if(b4_prefix, [yy], [],
[
// Take the name prefix into account.
#define yylex b4_prefix[]lex])[
/* First part of user declarations. */
-]b4_pre_prologue
+]b4_user_pre_prologue
-b4_defines_if([
-#include @output_header_name@])[
+b4_defines_if([[
+#include "@basename(]b4_spec_defines_file[@)"]])[
/* User implementation prologue. */
-]b4_post_prologue[
-
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
+]b4_user_post_prologue
+b4_percent_code_get[]dnl
-#ifndef YY_
-# if YYENABLE_NLS
+[#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include /* FIXME: INFRINGES ON USER NAME SPACE */
# define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -341,14 +336,12 @@ b4_syncline([@oline@], [@ofile@])[
/* Suppress unused-variable warnings by "using" E. */
#define YYUSE(e) ((void) (e))
-/* A pseudo ostream that takes yydebug_ into account. */
-# define YYCDEBUG \
- for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \
- (*yycdebug_)
-
/* Enable debugging if requested. */
#if YYDEBUG
+/* A pseudo ostream that takes yydebug_ into account. */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)
+
# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
do { \
if (yydebug_) \
@@ -373,19 +366,22 @@ do { \
#else /* !YYDEBUG */
+# define YYCDEBUG if (false) std::cerr
# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
# define YY_REDUCE_PRINT(Rule)
# define YY_STACK_PRINT()
#endif /* !YYDEBUG */
+#define yyerrok (yyerrstatus_ = 0)
+#define yyclearin (yychar = yyempty_)
+
#define YYACCEPT goto yyacceptlab
#define YYABORT goto yyabortlab
#define YYERROR goto yyerrorlab
+#define YYRECOVERING() (!!yyerrstatus_)
-namespace ]b4_namespace[
-{
-#if YYERROR_VERBOSE
+]b4_namespace_open[]b4_error_verbose_if([[
/* Return YYSTR after stripping away unnecessary quotes and
backslashes, so that it's suitable for yyerror. The heuristic is
@@ -423,13 +419,15 @@ namespace ]b4_namespace[
return yystr;
}
-
-#endif
+]])[
/// Build a parser object.
- ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
- : yydebug_ (false),
- yycdebug_ (&std::cerr)]b4_parse_param_cons[
+ ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
+ :])[
+#if YYDEBUG
+ ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false),
+ yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
{
}
@@ -467,7 +465,7 @@ namespace ]b4_namespace[
yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
*yycdebug_ << ')';
}
-#endif /* ! YYDEBUG */
+#endif
void
]b4_parser_class_name[::yydestruct_ (const char* yymsg,
@@ -495,6 +493,7 @@ namespace ]b4_namespace[
yylocation_stack_.pop (n);
}
+#if YYDEBUG
std::ostream&
]b4_parser_class_name[::debug_stream () const
{
@@ -519,7 +518,19 @@ namespace ]b4_namespace[
{
yydebug_ = l;
}
+#endif
+ inline bool
+ ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
+ {
+ return yyvalue == yypact_ninf_;
+ }
+
+ inline bool
+ ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
+ {
+ return yyvalue == yytable_ninf_;
+ }
int
]b4_parser_class_name[::parse ()
@@ -542,7 +553,7 @@ namespace ]b4_namespace[
/// Location of the lookahead.
location_type yylloc;
/// The locations where the error started and ended.
- location yyerror_range[2];
+ location_type yyerror_range[2];
/// $$.
semantic_type yyval;
@@ -557,11 +568,9 @@ namespace ]b4_namespace[
m4_pushdef([b4_at_dollar], [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
/* User initialization code. */
- b4_initial_action
+ b4_user_initial_action
m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
- /* Line __line__ of yacc.c. */
-b4_syncline([@oline@], [@ofile@])])dnl
+m4_popdef([b4_at_dollar])])dnl
[ /* Initialize the stacks. The initial state will be pushed in
yynewstate, since the latter expects the semantical and the
@@ -577,6 +586,11 @@ b4_syncline([@oline@], [@ofile@])])dnl
yynewstate:
yystate_stack_.push (yystate);
YYCDEBUG << "Entering state " << yystate << std::endl;
+
+ /* Accept? */
+ if (yystate == yyfinal_)
+ goto yyacceptlab;
+
goto yybackup;
/* Backup. */
@@ -584,7 +598,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
/* Try to take a decision without lookahead. */
yyn = yypact_[yystate];
- if (yyn == yypact_ninf_)
+ if (yy_pact_value_is_default_ (yyn))
goto yydefault;
/* Read a lookahead token. */
@@ -620,22 +634,17 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
yyn = yytable_[yyn];
if (yyn <= 0)
{
- if (yyn == 0 || yyn == yytable_ninf_)
- goto yyerrlab;
+ if (yy_table_value_is_error_ (yyn))
+ goto yyerrlab;
yyn = -yyn;
goto yyreduce;
}
- /* Accept? */
- if (yyn == yyfinal_)
- goto yyacceptlab;
-
/* Shift the lookahead token. */
YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
- /* Discard the token being shifted unless it is eof. */
- if (yychar != yyeof_)
- yychar = yyempty_;
+ /* Discard the token being shifted. */
+ yychar = yyempty_;
yysemantic_stack_.push (yylval);
yylocation_stack_.push (yylloc);
@@ -680,10 +689,9 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
YY_REDUCE_PRINT (yyn);
switch (yyn)
{
- ]b4_actions
- /* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
- default: break;
+ ]b4_user_actions[
+ default:
+ break;
}
YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc);
@@ -712,8 +720,7 @@ b4_syncline([@oline@], [@ofile@])[
if (!yyerrstatus_)
{
++yynerrs_;
- error (yylloc, yysyntax_error_ (yystate]dnl
-b4_error_verbose_if([, yytoken])[));
+ error (yylloc, yysyntax_error_ (yystate, yytoken));
}
yyerror_range[0] = yylloc;
@@ -768,7 +775,7 @@ b4_error_verbose_if([, yytoken])[));
for (;;)
{
yyn = yypact_[yystate];
- if (yyn != yypact_ninf_)
+ if (!yy_pact_value_is_default_ (yyn))
{
yyn += yyterror_;
if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
@@ -792,9 +799,6 @@ b4_error_verbose_if([, yytoken])[));
YY_STACK_PRINT ();
}
- if (yyn == yyfinal_)
- goto yyacceptlab;
-
yyerror_range[1] = yylloc;
// Using YYLLOC is tempting, but would change the location of
// the lookahead. YYLOC is available though.
@@ -804,7 +808,7 @@ b4_error_verbose_if([, yytoken])[));
/* Shift the error token. */
YY_SYMBOL_PRINT ("Shifting", yystos_[yyn],
- &yysemantic_stack_[0], &yylocation_stack_[0]);
+ &yysemantic_stack_[0], &yylocation_stack_[0]);
yystate = yyn;
goto yynewstate;
@@ -820,7 +824,7 @@ b4_error_verbose_if([, yytoken])[));
goto yyreturn;
yyreturn:
- if (yychar != yyeof_ && yychar != yyempty_)
+ if (yychar != yyempty_)
yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc);
/* Do not reclaim the symbols of the rule which action triggered
@@ -840,52 +844,73 @@ b4_error_verbose_if([, yytoken])[));
// Generate an error message.
std::string
- ]b4_parser_class_name[::yysyntax_error_ (int yystate]dnl
-b4_error_verbose_if([, int tok])[)
+ ]b4_parser_class_name[::yysyntax_error_ (]dnl
+b4_error_verbose_if([int yystate, int yytoken],
+ [int, int])[)
{
- std::string res;
- YYUSE (yystate);
-#if YYERROR_VERBOSE
+ std::string yyres;]b4_error_verbose_if([[
int yyn = yypact_[yystate];
if (yypact_ninf_ < yyn && yyn <= yylast_)
{
/* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
+ YYCHECK. In other words, skip the first -YYN actions for this
+ state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = yylast_ - yyn + 1;
int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
- int count = 0;
- for (int x = yyxbegin; x < yyxend; ++x)
- if (yycheck_[x + yyn] == x && x != yyterror_)
- ++count;
-
- // FIXME: This method of building the message is not compatible
- // with internationalization. It should work like yacc.c does it.
- // That is, first build a string that looks like this:
- // "syntax error, unexpected %s or %s or %s"
- // Then, invoke YY_ on this string.
- // Finally, use the string as a format to output
- // yytname_[tok], etc.
- // Until this gets fixed, this message appears in English only.
- res = "syntax error, unexpected ";
- res += yytnamerr_ (yytname_[tok]);
- if (count < 5)
- {
- count = 0;
- for (int x = yyxbegin; x < yyxend; ++x)
- if (yycheck_[x + yyn] == x && x != yyterror_)
- {
- res += (!count++) ? ", expecting " : " or ";
- res += yytnamerr_ (yytname_[x]);
- }
- }
+
+ // Number of reported tokens (one for the "unexpected", one per
+ // "expected").
+ size_t yycount = 0;
+ // Its maximum.
+ enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+ // Arguments of yyformat.
+ char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+ yyarg[yycount++] = yytname_[yytoken];
+ for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
+ if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
+ && !yy_table_value_is_error_ (yytable_[yyx + yyn]))
+ {
+ if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+ {
+ yycount = 1;
+ break;
+ }
+ else
+ yyarg[yycount++] = yytname_[yyx];
+ }
+
+ char const* yyformat = 0;
+ switch (yycount)
+ {
+#define YYCASE_(N, S) \
+ case N: \
+ yyformat = S; \
+ break
+ YYCASE_(1, YY_("syntax error, unexpected %s"));
+ YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+ YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+ YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+ YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+ }
+ // Argument number.
+ size_t yyi = 0;
+ for (char const* yyp = yyformat; *yyp; ++yyp)
+ if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)
+ {
+ yyres += yytnamerr_ (yyarg[yyi++]);
+ ++yyp;
+ }
+ else
+ yyres += *yyp;
}
else
-#endif
- res = YY_("syntax error");
- return res;
+ ]])dnl
+[ yyres = YY_("syntax error");
+ return yyres;
}
@@ -898,9 +923,9 @@ b4_error_verbose_if([, int tok])[)
]b4_pact[
};
- /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
- doesn't specify something else to do. Zero means the default is an
- error. */
+ /* YYDEFACT[S] -- default reduction number in state S. Performed when
+ YYTABLE doesn't specify something else to do. Zero means the
+ default is an error. */
const ]b4_int_type_for([b4_defact])[
]b4_parser_class_name[::yydefact_[] =
{
@@ -923,7 +948,7 @@ b4_error_verbose_if([, int tok])[)
/* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
positive, shift that token. If negative, reduce the rule which
- number is the opposite. If zero, do what YYDEFACT says. */
+ number is the opposite. If YYTABLE_NINF_, syntax error. */
const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
const ]b4_int_type_for([b4_table])[
]b4_parser_class_name[::yytable_[] =
@@ -1022,7 +1047,7 @@ b4_error_verbose_if([, int tok])[)
int yynrhs = yyr2_[yyrule];
/* Print the symbols being reduced, and their result. */
*yycdebug_ << "Reducing stack by rule " << yyrule - 1
- << " (line " << yylno << "), ";
+ << " (line " << yylno << "):" << std::endl;
/* The symbols being reduced. */
for (int yyi = 0; yyi < yynrhs; yyi++)
YY_SYMBOL_PRINT (" $" << yyi + 1 << " =",
@@ -1060,21 +1085,20 @@ b4_error_verbose_if([, int tok])[)
const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[;
const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;
-} // namespace ]b4_namespace[
+]b4_namespace_close[
]b4_epilogue
dnl
-@output b4_dir_prefix[]stack.hh
+@output(b4_dir_prefix[]stack.hh@)@
b4_copyright([Stack handling for Bison parsers in C++],
- [2002, 2003, 2004, 2005, 2006])[
+ [2002-2010])[
#ifndef BISON_STACK_HH
# define BISON_STACK_HH
#include
-namespace ]b4_namespace[
-{
+]b4_namespace_open[
template >
class stack
{
@@ -1160,7 +1184,8 @@ namespace ]b4_namespace[
const S& stack_;
unsigned int range_;
};
-}
+]b4_namespace_close[
-#endif // not BISON_STACK_HH]
-m4_divert(-1)
+#endif // not BISON_STACK_HH[]dnl
+]
+m4_divert_pop(0)