-m4_divert(-1) -*- C -*-
-
# C++ GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+
+# 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 <http://www.gnu.org/licenses/>.
# This skeleton produces a C++ class that encapsulates a C glr parser.
#
# The additional arguments are stored as members of the parser
# object, yyparser. The C routines need to carry yyparser
-# throughout the C parser; that easy: just let yyparser become an
+# throughout the C parser; that's easy: make yyparser an
# additional parse-param. But because the C++ skeleton needs to
# know the "real" original parse-param, we save them
# (b4_parse_param_orig). Note that b4_parse_param is overquoted
# The locations
#
# We use location.cc just like lalr1.cc, but because glr.c stores
-# the locations in a (C++) union, the position and location classes
+# the locations in a union, the position and location classes
# must not have a constructor. Therefore, contrary to lalr1.cc, we
# must not define "b4_location_constructors". As a consequence the
# user must initialize the first positions (in particular the
# filename member).
-# We require a pure interface using locations.
-m4_define([b4_locations_flag], [1])
+# We require a pure interface.
m4_define([b4_pure_flag], [1])
-# The header is mandatory.
-b4_defines_if([],
- [m4_fatal(b4_skeleton[: using %defines is mandatory])])
-
m4_include(b4_pkgdatadir/[c++.m4])
-m4_include(b4_pkgdatadir/[location.cc])
+b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
+ [m4_include(b4_pkgdatadir/[location.cc])])])
+m4_define([b4_parser_class_name],
+ [b4_percent_define_get([[parser_class_name]])])
# Save the parse parameters.
m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
-# b4_yy_symbol_print_generate
-# ---------------------------
+# b4_yy_symbol_print_define
+# -------------------------
# Bypass the default implementation to generate the "yy_symbol_print"
# and "yy_symbol_value_print" functions.
-m4_define([b4_yy_symbol_print_generate],
+m4_define([b4_yy_symbol_print_define],
[[
/*--------------------.
| Print this symbol. |
`--------------------*/
-]b4_c_ansi_function_def([yy_symbol_print],
+]b4_function_define([yy_symbol_print],
[static void],
- [[FILE *], []],
- [[int yytype], [yytype]],
- [[const b4_namespace::b4_parser_class_name::semantic_type *yyvaluep],
- [yyvaluep]],
- [[const b4_namespace::b4_parser_class_name::location_type *yylocationp],
- [yylocationp]],
+ [[FILE *], []],
+ [[int yytype], [yytype]],
+ [[const ]b4_namespace_ref::b4_parser_class_name[::semantic_type *yyvaluep],
+ [yyvaluep]][]dnl
+b4_locations_if([,
+ [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+ [yylocationp]]]),
b4_parse_param)[
{
]b4_parse_param_use[]dnl
]])
-# Declare yyerror.
+# Hijack the post prologue to insert early definition of YYLLOC_DEFAULT
+# and declaration of yyerror.
m4_append([b4_post_prologue],
-[b4_syncline([@oline@], [@ofile@])
-
-b4_c_ansi_function_decl([yyerror],
- [static void],
- [[b4_namespace::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+[b4_syncline([@oline@], [@ofile@])[
+]b4_yylloc_default_define[
+#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
+]b4_function_declare([yyerror],
+ [static void],b4_locations_if([
+ [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+ [yylocationp]],])
b4_parse_param,
[[const char* msg], [msg]])])
-# Define yyerror.
+# Hijack the epilogue to define implementations (yyerror, parser member
+# functions etc.).
m4_append([b4_epilogue],
[b4_syncline([@oline@], [@ofile@])[
/*------------------.
| Report an error. |
`------------------*/
-]b4_c_ansi_function_def([yyerror],
- [static void],
- [[b4_namespace::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+]b4_function_define([yyerror],
+ [static void],b4_locations_if([
+ [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+ [yylocationp]],])
b4_parse_param,
[[const char* msg], [msg]])[
{
]b4_parse_param_use[]dnl
-[ yyparser.error (*yylocationp, msg);
+[ yyparser.error (]b4_locations_if([[*yylocationp, ]])[msg);
}
-namespace ]b4_namespace[
-{
-]dnl In this section, the parse param are the original parse_params.
+]b4_namespace_open[
+]dnl In this section, the parse params are the original parse_params.
m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
[ /// Build a parser object.
- ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
- : 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 ]b4_api_PREFIX[DEBUG
+ ]m4_ifset([b4_parse_param], [ ], [ :])[yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
{
}
return ::yyparse (*this]b4_user_args[);
}
-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG
/*--------------------.
| Print this symbol. |
`--------------------*/
inline void
]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
- const semantic_type* yyvaluep, const location_type* yylocationp)
- {
- /* Pacify ``unused variable'' warnings. */
+ const semantic_type* yyvaluep]b4_locations_if([[,
+ const location_type* yylocationp]])[)
+ {]b4_locations_if([[
+ YYUSE (yylocationp);]])[
YYUSE (yyvaluep);
- YYUSE (yylocationp);
+ std::ostream& yyoutput = debug_stream ();
+ std::ostream& yyo = yyoutput;
+ YYUSE (yyo);
switch (yytype)
{
- ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+]b4_symbol_foreach([b4_symbol_printer])dnl
[ default:
- break;
+ break;
}
}
void
]b4_parser_class_name[::yy_symbol_print_ (int yytype,
- const semantic_type* yyvaluep, const location_type* yylocationp)
+ const semantic_type* yyvaluep]b4_locations_if([[,
+ const location_type* yylocationp]])[)
{
*yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
- << ' ' << yytname[yytype] << " ("
- << *yylocationp << ": ";
- yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
+ << ' ' << yytname[yytype] << " ("]b4_locations_if([[
+ << *yylocationp << ": "]])[;
+ yy_symbol_value_print_ (yytype, yyvaluep]b4_locations_if([[, yylocationp]])[);
*yycdebug_ << ')';
}
]b4_parser_class_name[::debug_level_type
]b4_parser_class_name[::debug_level () const
{
- return ::yydebug;
+ return yydebug;
}
void
]b4_parser_class_name[::set_debug_level (debug_level_type l)
{
- ::yydebug = l;
+ // Actually, it is yydebug which is really used.
+ yydebug = l;
}
-#endif /* ! YYDEBUG */
+#endif
]m4_popdef([b4_parse_param])dnl
-[} // namespace ]b4_namespace[
-
-]])
-
-
-# Let glr.c believe that the user arguments include the parser itself.
-m4_ifset([b4_parse_param],
-[m4_pushdef([b4_parse_param],
- m4_dquote([[[b4_namespace::b4_parser_class_name& yyparser], [[yyparser]]],]
-m4_defn([b4_parse_param])))],
-[m4_pushdef([b4_parse_param],
- [[[[b4_namespace::b4_parser_class_name& yyparser], [[yyparser]]]]])
+b4_namespace_close
])
-m4_include(b4_pkgdatadir/[glr.c])
-m4_popdef([b4_parse_param])
-
-@output @output_header_name@
-b4_copyright([Skeleton interface for Bison GLR parsers in C++],
- [2002, 2003, 2004, 2005, 2006])[
-
-/* C++ GLR parser skeleton written by Akim Demaille. */
-
-#ifndef PARSER_HEADER_H
-# define PARSER_HEADER_H
-]m4_ifdef([b4_start_header],
-[[/* Copy the %start-header blocks. */
-]b4_user_start_header])[
+# b4_shared_declarations
+# ----------------------
+# Declaration that might either go into the header (if --defines)
+# or open coded in the parser body.
+m4_define([b4_shared_declarations],
+[dnl In this section, the parse params are the original parse_params.
+m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
+b4_percent_code_get([[requires]])[
+#include <stdexcept>
#include <string>
-#include <iostream>
-
-/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
+#include <iostream>]b4_defines_if([
+b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
+ [[#include "location.hh"]])])])[
-namespace ]b4_namespace[
-{
- class position;
- class location;
-}
+]b4_YYDEBUG_define[
-#include "location.hh"
+]b4_namespace_open[
+]b4_defines_if([],
+[b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
+ [b4_position_define
+b4_location_define])])])[
-/* Enabling traces. */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug_flag[
-#endif
-
-/* Enabling verbose error messages. */
-#ifdef YYERROR_VERBOSE
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#else
-# define YYERROR_VERBOSE ]b4_error_verbose_flag[
-#endif
-
-/* Enabling the token table. */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE ]b4_token_table[
-#endif
-
-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
- If N is 0, then set CURRENT to the empty location which ends
- the previous symbol: RHS[0] (always defined). */
-
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N) \
- do \
- if (N) \
- { \
- (Current).begin = YYRHSLOC (Rhs, 1).begin; \
- (Current).end = YYRHSLOC (Rhs, N).end; \
- } \
- else \
- { \
- (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end; \
- } \
- while (/*CONSTCOND*/ 0)
-#endif
-
-namespace ]b4_namespace[
-{
/// A Bison parser.
class ]b4_parser_class_name[
{
public:
- /// Symbol semantic values.
-#ifndef YYSTYPE
-]m4_ifdef([b4_stype],
-[ union 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;
- /// Tokens.
- struct token
- {
- ]b4_token_enums(b4_tokens)[
- };
- /// Token type.
- typedef token::yytokentype token_type;
+]b4_public_types_declare[
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[);
/// Set the current debugging level.
void set_debug_level (debug_level_type l);
- private:
-
public:
- /// Report a syntax error.
- /// \param loc where the syntax error is found.
+ /// Report a syntax error.]b4_locations_if([[
+ /// \param loc where the syntax error is found.]])[
/// \param msg a description of the syntax error.
- virtual void error (const location_type& loc, const std::string& msg);
- private:
+ virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);
-#if YYDEBUG
+# if ]b4_api_PREFIX[DEBUG
public:
/// \brief Report a symbol value on the debug stream.
/// \param yytype The token type.
- /// \param yyvaluep Its semantic value.
- /// \param yylocationp Its location.
+ /// \param yyvaluep Its semantic value.]b4_locations_if([[
+ /// \param yylocationp Its location.]])[
virtual void yy_symbol_value_print_ (int yytype,
- const semantic_type* yyvaluep,
- const location_type* yylocationp);
+ const semantic_type* yyvaluep]b4_locations_if([[,
+ const location_type* yylocationp]])[);
/// \brief Report a symbol on the debug stream.
/// \param yytype The token type.
- /// \param yyvaluep Its semantic value.
- /// \param yylocationp Its location.
+ /// \param yyvaluep Its semantic value.]b4_locations_if([[
+ /// \param yylocationp Its location.]])[
virtual void yy_symbol_print_ (int yytype,
- const semantic_type* yyvaluep,
- const location_type* yylocationp);
+ const semantic_type* yyvaluep]b4_locations_if([[,
+ const location_type* yylocationp]])[);
private:
-#endif /* ! YYDEBUG */
-
-
- /// \brief Reclaim the memory associated to a symbol.
- /// \param yymsg Why this token is reclaimed.
- /// \param yytype The symbol type.
- /// \param yyvaluep Its semantic value.
- /// \param yylocationp Its location.
- inline void yydestruct_ (const char* yymsg,
- int yytype,
- semantic_type* yyvaluep,
- location_type* yylocationp);
-
/* Debugging. */
std::ostream* yycdebug_;
+#endif
+
]b4_parse_param_vars[
};
]dnl Redirections for glr.c.
-m4_ifset([b4_global_tokens_and_yystype],
-[b4_token_defines(b4_tokens)])
+b4_percent_define_flag_if([[global_tokens_and_yystype]],
+[b4_token_defines])
[
-#ifndef YYSTYPE
-# define YYSTYPE ]b4_namespace[::]b4_parser_class_name[::semantic_type
+#ifndef ]b4_api_PREFIX[STYPE
+# define ]b4_api_PREFIX[STYPE ]b4_namespace_ref[::]b4_parser_class_name[::semantic_type
#endif
-#ifndef YYLTYPE
-# define YYLTYPE ]b4_namespace[::]b4_parser_class_name[::location_type
+#ifndef ]b4_api_PREFIX[LTYPE
+# define ]b4_api_PREFIX[LTYPE ]b4_namespace_ref[::]b4_parser_class_name[::location_type
#endif
-}
+]b4_namespace_close[
+]b4_percent_code_get([[provides]])[
+]m4_popdef([b4_parse_param])dnl
+])
+
+b4_defines_if(
+[m4_changecom()dnl
+m4_divert_push(0)dnl
+@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison GLR parsers in C++],
+ [2002-2012])[
-]m4_ifdef([b4_end_header],
-[[/* Copy the %end-header blocks. */
-]b4_end_header])[]dnl
+/* C++ GLR parser skeleton written by Akim Demaille. */
-[#endif /* ! defined PARSER_HEADER_H */]
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]m4_divert_pop(0)
+m4_changecom[#])])
+
+# Let glr.c (and b4_shared_declarations) believe that the user
+# arguments include the parser itself.
+m4_ifset([b4_parse_param],
+[m4_pushdef([b4_parse_param],
+ [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]],]
+m4_defn([b4_parse_param]))],
+[m4_pushdef([b4_parse_param],
+ [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]]])
+])
+m4_include(b4_pkgdatadir/[glr.c])
+m4_popdef([b4_parse_param])
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