# C++ GLR skeleton for Bison
-# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
# user must initialize the first positions (in particular the
# filename member).
+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]))])])
+
# We require a pure interface.
m4_define([b4_pure_flag], [1])
-# The header is mandatory.
-b4_defines_if([],
- [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
-
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]],
]b4_parse_param_use[]dnl
[ yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
}
-]])
+]])[
+# 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])]))])[
# Hijack the post prologue to insert early definition of YYLLOC_DEFAULT
# and declaration of yyerror.
-m4_append([b4_post_prologue],
+]m4_append([b4_post_prologue],
[b4_syncline([@oline@], [@ofile@])[
]b4_yylloc_default_define[
#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
-]b4_c_ansi_function_decl([yyerror],
+]b4_function_declare([yyerror],
[static void],b4_locations_if([
[[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
[yylocationp]],])
[[const char* msg], [msg]])])
+#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],
+]b4_function_define([yyerror],
[static void],b4_locations_if([
[[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
[yylocationp]],])
]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], [
#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],
- [[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++],
- [2002-2012])[
-
-/* C++ GLR parser skeleton written by Akim Demaille. */
-
-]b4_cpp_guard_open([b4_spec_defines_file])[
-
-]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"]])[
+#include <iostream>]b4_defines_if([
+b4_bison_locations_if([[#include "location.hh"]])])[
]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[
{
const semantic_type* yyvaluep]b4_locations_if([[,
const location_type* yylocationp]])[);
private:
- /* Debugging. */
+ // Debugging.
std::ostream* yycdebug_;
#endif
]b4_namespace_close[
]b4_percent_code_get([[provides]])[
+]m4_popdef([b4_parse_param])dnl
+])
+
+b4_defines_if(
+[b4_output_begin([b4_spec_defines_file])
+b4_copyright([Skeleton interface for Bison GLR parsers in C++],
+ [2002-2013])[
+
+// 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])[
-]m4_divert_pop(0)
+]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])
projects / bison.git / blobdiff