- -*- C -*-
-
# C++ GLR skeleton for Bison
# Copyright (C) 2002-2012 Free Software Foundation, Inc.
#
# 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])
-m4_define([b4_pure_flag], [1])
+b4_token_ctor_if([b4_variant_if([],
+ [b4_fatal_at(b4_percent_define_get_loc(api.token.constructor),
+ [cannot use '%s' without '%s'],
+ [%define api.token.constructor],
+ [%define api.value.type variant]))])])
-# The header is mandatory.
-b4_defines_if([],
- [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
+# We require a pure interface.
+m4_define([b4_pure_flag], [1])
m4_include(b4_pkgdatadir/[c++.m4])
-b4_percent_define_ifdef([[location_type]], [],
- [m4_include(b4_pkgdatadir/[location.cc])])
+b4_bison_locations_if([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_parse_param_wrap
+# -------------------
+# New ones.
+m4_ifset([b4_parse_param],
+[m4_define([b4_parse_param_wrap],
+ [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]],]
+m4_defn([b4_parse_param]))],
+[m4_define([b4_parse_param_wrap],
+ [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]]])
+])
+
-# 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_ref::b4_parser_class_name::semantic_type *yyvaluep],
- [yyvaluep]],
- [[const b4_namespace_ref::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
[ yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
}
-]])
-
+]])[
-# Declare yyerror.
-m4_append([b4_post_prologue],
-[b4_syncline([@oline@], [@ofile@])
+# Hijack the initial action to initialize the locations.
+]b4_bison_locations_if([m4_define([b4_initial_action],
+[yylloc.initialize ();]m4_ifdef([b4_initial_action], [
+m4_defn([b4_initial_action])]))])[
-b4_c_ansi_function_decl([yyerror],
- [static void],
- [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
- [yylocationp]],
+# 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_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.
+#undef yynerrs
+#undef yychar
+#undef yylval]b4_locations_if([
+#undef yylloc])
+
+m4_if(b4_prefix, [yy], [],
+[[/* Substitute the variable and function names. */
+#define yyparse ]b4_prefix[parse
+#define yylex ]b4_prefix[lex
+#define yyerror ]b4_prefix[error
+#define yydebug ]b4_prefix[debug
+]]b4_pure_if([], [[
+#define yylval ]b4_prefix[lval
+#define yychar ]b4_prefix[char
+#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
+#define yylloc ]b4_prefix[lloc]])]))
+
+# 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],
- [[const b4_namespace_ref::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);
}
]b4_namespace_open[
-]dnl In this section, the parse param are the original parse_params.
+]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[)]m4_ifset([b4_parse_param], [
:])[
-#if YYDEBUG
- ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false),
- yycdebug_ (&std::cerr)]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)
- {
- YYUSE (yylocationp);
+ const semantic_type* yyvaluep]b4_locations_if([[,
+ const location_type* yylocationp]])[)
+ {]b4_locations_if([[
+ YYUSE (yylocationp);]])[
YYUSE (yyvaluep);
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;
}
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
]m4_popdef([b4_parse_param])dnl
-b4_namespace_close[
-
-]])
-
-
-# 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_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]]]]])
+b4_namespace_close
])
-m4_include(b4_pkgdatadir/[glr.c])
-m4_popdef([b4_parse_param])
-
-m4_divert_push(0)
-@output(b4_spec_defines_file@)@
-b4_copyright([Skeleton interface for Bison GLR parsers in C++],
- [2002-2006, 2009-2012])[
-
-/* C++ GLR parser skeleton written by Akim Demaille. */
-
-#ifndef PARSER_HEADER_H
-# define PARSER_HEADER_H
-]b4_percent_code_get([[requires]])[
+# 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],
+[m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
+b4_percent_code_get([[requires]])[
+#include <cstdlib> // abort
+#include <stdexcept>
#include <string>
-#include <iostream>
-]b4_percent_define_ifdef([[location_type]], [],
- [[#include "location.hh"]])[
-
-/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
-
-/* Enabling traces. */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug_flag[
-#endif
+#include <iostream>]b4_defines_if([
+b4_bison_locations_if([[#include "location.hh"]])])[
-/* 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
+]b4_YYDEBUG_define[
]b4_namespace_open[
+]b4_defines_if([],
+[b4_bison_locations_if([b4_position_define
+b4_location_define])])[
+
/// 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_percent_define_get([[location_type]],
- [[location]])[ 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:
- /* Debugging. */
- int yydebug_;
+ // Debugging.
std::ostream* yycdebug_;
#endif
]dnl Redirections for glr.c.
b4_percent_define_flag_if([[global_tokens_and_yystype]],
-[b4_token_defines(b4_tokens)])
+[b4_token_defines])
[
-#ifndef YYSTYPE
-# define YYSTYPE ]b4_namespace_ref[::]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_ref[::]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_percent_code_get([[provides]])[]dnl
+b4_defines_if(
+[b4_output_begin([b4_spec_defines_file])
+b4_copyright([Skeleton interface for Bison GLR parsers in C++],
+ [2002-2012])[
-[#endif /* ! defined PARSER_HEADER_H */]
-m4_divert_pop(0)
+// C++ GLR parser skeleton written by Akim Demaille.
+
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]b4_output_end()])
+
+# Let glr.c (and b4_shared_declarations) believe that the user
+# arguments include the parser itself.
+m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_wrap]))
+m4_include(b4_pkgdatadir/[glr.c])
+m4_popdef([b4_parse_param])
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