# C++ skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
# Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
m4_copy([b4_symbol_value], [b4_symbol_value_template])
-# b4_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT])
-# ----------------------------------------------------------------
-m4_define([b4_lex_symbol_if],
-[b4_percent_define_ifdef([[lex_symbol]], [$1], [$2])])
-
-
-# b4_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
-# ------------------------------------------------
-m4_define([b4_assert_if],
-[b4_percent_define_ifdef([[assert]], [$1], [$2])])
-
-
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
m4_popdef([b4_dollar_dollar])dnl
])])
-# b4_symbol_constructor_declaration_(SYMBOL-NUMBER)
-# -------------------------------------------------
-# Declare the overloaded version of make_symbol for the (common) type of
-# these SYMBOL-NUMBERS. Use at class-level.
-m4_define([b4_symbol_constructor_declaration_],
-[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
-[ static inline
- symbol_type
- make_[]b4_symbol_([$1], [id]) (dnl
-b4_args(b4_symbol_if([$1], [has_type],
- [const b4_symbol([$1], [type])& v]),
- b4_locations_if([const location_type& l])));
-
-])])])
-
-
-# b4_symbol_constructor_declarations
-# ----------------------------------
-# Declare symbol constructors for all the value types.
-# Use at class-level.
-m4_define([b4_symbol_constructor_declarations],
-[b4_variant_if([
- // Symbol constructors declarations.
-b4_symbol_foreach([b4_symbol_constructor_declaration_])])])
-
-
-
-# b4_symbol_constructor_definition_(SYMBOL-NUMBER)
-# ------------------------------------------------
-# Define symbol constructor for this SYMBOL-NUMBER.
-m4_define([b4_symbol_constructor_definition_],
-[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
-[ b4_parser_class_name::symbol_type
- b4_parser_class_name::make_[]b4_symbol_([$1], [id]) (dnl
-b4_args(b4_symbol_if([$1], [has_type],
- [const b4_symbol([$1], [type])& v]),
- b4_locations_if([const location_type& l])))
- {
- return symbol_type (b4_args([yytranslate_ (token::b4_symbol([$1], [id]))],
- b4_symbol_if([$1], [has_type], [v]),
- b4_locations_if([l])));
- }
-
-])])])
-
-
-# b4_symbol_constructor_definitions
-# ----------------------------------
-# Define the overloaded versions of make_symbol for all the value types.
-m4_define([b4_symbol_constructor_definitions],
-[[ // symbol_base_type.
- template <typename Exact>
- ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type ()
- : value()]b4_locations_if([
- , location()])[
- {
- }]b4_locations_if([[
-
- template <typename Exact>
- ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (const location_type& l)
- : value()
- , location(l)
- {
- }]])[
-
- template <typename Exact>
- ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (]b4_args(
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[)
- : value(v)]b4_locations_if([
- , location(l)])[
- {
- }
-
- template <typename Exact>
- const Exact&
- ]b4_parser_class_name[::symbol_base_type<Exact>::self () const
- {
- return static_cast<const Exact&>(*this);
- }
-
- template <typename Exact>
- Exact&
- ]b4_parser_class_name[::symbol_base_type<Exact>::self ()
- {
- return static_cast<Exact&>(*this);
- }
-
- template <typename Exact>
- int
- ]b4_parser_class_name[::symbol_base_type<Exact>::type_get () const
- {
- return self ().type_get_ ();
- }
-
- // symbol_type.
- ]b4_parser_class_name[::symbol_type::symbol_type ()
- : super_type ()
- , type ()
- {
- }
-
- ]b4_parser_class_name[::symbol_type::symbol_type (]b4_args(
- [int t],
- b4_locations_if([const location_type& l]))[)
- : super_type (]b4_locations_if([l])[)
- , type (t)
- {
- }
-
- ]b4_parser_class_name[::symbol_type::symbol_type (]b4_args(
- [int t],
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[)
- : super_type (v]b4_locations_if([, l])[)
- , type (t)
- {
- }
-
- int
- ]b4_parser_class_name[::symbol_type::type_get_ () const
- {
- return type;
- }
-]b4_lex_symbol_if([[
- ]b4_parser_class_name[::token_type
- ]b4_parser_class_name[::symbol_type::token () const
- {
- // YYTOKNUM[NUM] -- (External) token number corresponding to the
- // (internal) symbol number NUM (which must be that of a token). */
- static
- const ]b4_int_type_for([b4_toknum])[
- yytoken_number_[] =
- {
- ]b4_toknum[
- };
- return static_cast<token_type> (yytoken_number_[type]);
- }
-]])[
-
-]b4_variant_if(
-[ // Implementation of make_symbol for each symbol type.
-b4_symbol_foreach([b4_symbol_constructor_definition_])])])
-
-
-# b4_yytranslate_definition
-# -------------------------
-# Define yytranslate_. Sometimes we want it in the header file,
-# sometimes the cc file suffices.
-m4_define([b4_yytranslate_definition],
-[[ // Symbol number corresponding to token number t.
- ]b4_parser_class_name[::token_number_type
- ]b4_parser_class_name[::yytranslate_ (]b4_lex_symbol_if([token_type],
- [int])[ t)
- {
- static
- const token_number_type
- translate_table[] =
- {
-]b4_translate[
- };
- const unsigned int user_token_number_max_ = ]b4_user_token_number_max[;
- const token_number_type undef_token_ = ]b4_undef_token_number[;
-
- if (static_cast<int>(t) <= yyeof_)
- return yyeof_;
- else if (static_cast<unsigned int> (t) <= user_token_number_max_)
- return translate_table[t];
- else
- return undef_token_;
- }
-]])
-
m4_pushdef([b4_copyright_years],
- [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009])
m4_define([b4_parser_class_name],
[b4_percent_define_get([[parser_class_name]])])
]b4_percent_code_get([[requires]])[
-]b4_assert_if([#include <cassert>])[
+]b4_parse_assert_if([#include <cassert>])[
#include <string>
#include <iostream>
#include "stack.hh"
]b4_namespace_open[
]b4_locations_if([ class position;
class location;])[
-]b4_variant_if([b4_variant_definition])[
+]b4_variant_if([b4_variant_define])[
]b4_namespace_close[
]b4_locations_if([#include "location.hh"])[
/* Enabling traces. */
#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug_flag[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
#endif
/* Enabling verbose error messages. */
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
-# define YYERROR_VERBOSE ]b4_error_verbose_flag[
+# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
/* Enabling the token table. */
class ]b4_parser_class_name[
{
public:
-#ifndef YYSTYPE
-]b4_variant_if(
-[ /// An auxiliary type to compute the largest semantic type.
- union union_type
- {]b4_type_foreach([b4_char_sizeof])[};
-
- /// Symbol semantic values.
- typedef variant<sizeof(union_type)> semantic_type;],
-[ /// Symbol semantic values.
-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]b4_locations_if([
- /// Symbol locations.
- typedef b4_percent_define_get([[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[);
virtual ~]b4_parser_class_name[ ();
void set_debug_level (debug_level_type l);
#endif
- private:
/// 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 (]b4_locations_if([const location_type& loc, ])[const std::string& msg);
+ private:
/// Generate an error message.
/// \param state the state where the error occurred.
/// \param tok the lookahead token.
/// Convert a scanner token number \a t to a symbol number.
static inline token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t);
- /// A complete symbol, with its type.
- template <typename Exact>
- struct symbol_base_type
- {
- /// Default constructor.
- inline symbol_base_type ();
-
- /// Constructor.]b4_locations_if([
- inline symbol_base_type (const location_type& l)])[;
- inline symbol_base_type (]b4_args(
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[);
-
- /// Return this with its exact type.
- const Exact& self () const;
- Exact& self ();
-
- /// Return the type of this symbol.
- int type_get () const;
-
- /// The semantic value.
- semantic_type value;]b4_locations_if([
-
- /// The location.
- location_type location;])[
- };
-
#if YYDEBUG
/// \brief Display a symbol type, value and location.
/// \param yyo The output stream.
inline void yy_destroy_ (const char* yymsg,
symbol_base_type<Exact>& yysym) const;
- public:
- /// Element of the stack: a state and its attributes.
- struct symbol_type : symbol_base_type<symbol_type>
- {
- /// The parent class.
- typedef symbol_base_type<symbol_type> super_type;
-
- /// Default constructor.
- inline symbol_type ();
-
- /// Constructor.
- inline symbol_type (]b4_args([int t],
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[);
-
- inline symbol_type (]b4_args([int t],
- b4_locations_if([const location_type& l]))[);
-
- /// The symbol type.
- int type;
-
- /// Return the type corresponding to this state.
- inline int type_get_ () const;
-
- /// Its token.
- inline token_type token () const;
- };
-
-]b4_symbol_constructor_declarations[
-
private:
/// Element of the stack: a state and its attributes.
struct stack_symbol_type : symbol_base_type<stack_symbol_type>
]b4_parse_param_vars[
};
-]b4_lex_symbol_if([b4_yytranslate_definition])[
-]b4_lex_symbol_if([b4_symbol_constructor_definitions])[
+]b4_lex_symbol_if([b4_yytranslate_define
+b4_public_types_define])[
]b4_namespace_close[
]b4_percent_define_flag_if([[global_tokens_and_yystype]],
| Symbol types. |
`---------------*/
-]b4_lex_symbol_if([], [b4_symbol_constructor_definitions])[
+]b4_lex_symbol_if([], [b4_public_types_define])[
// stack_symbol_type.
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
yyreduce:
yylen = yyr2_[yyn];]b4_variant_if([
/* Variants are always initialized to an empty instance of the
- correct type. The default $$=$1 rule is NOT applied when using
- variants */
+ correct type. The default $$=$1 action is NOT applied when using
+ variants. */
]b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build]),[
/* If YYLEN is nonzero, implement the default value of the action:
`$$ = $1'. Otherwise, use the top of the stack.
yylhs.state = yystate;
YY_SYMBOL_PRINT ("-> $$ =", yylhs);
]b4_variant_if([[
- // Destroy the lhs symbols.
+ // Destroy the rhs symbols.
for (int i = 0; i < yylen; ++i)
- // Destroy a variant which value may have be swapped with
- // yylhs.value. The value of yylhs.value (hence maybe one of
- // these lhs symbols) depends on what does the default
- // contruction for this type. In the case of pointers for
- // instance, nothing is done, so the value is junk. Therefore
- // do not try to report the content in the debug trace, it's
- // junk. Hence yymsg = 0. Besides, that keeps exactly the same
- // traces as with the other Bison skeletons.
+ // Destroy a variant which value may have been swapped with
+ // yylhs.value (for instance if the action was "std::swap($$,
+ // $1)"). The value of yylhs.value (hence possibly one of these
+ // rhs symbols) depends on the default contruction for this
+ // type. In the case of pointers for instance, no
+ // initialization is done, so the value is junk. Therefore do
+ // not try to report the value of symbols about to be destroyed
+ // in the debug trace, it's possibly junk. Hence yymsg = 0.
+ // Besides, that keeps exactly the same traces as with the other
+ // Bison skeletons.
yy_destroy_ (0, yystack_[i]);]])[
yypop_ (yylen);
yypush_ (0, yylhs);
goto yynewstate;
- /*------------------------------------.
- | yyerrlab -- here on detecting error |
- `------------------------------------*/
+ /*--------------------------------------.
+ | yyerrlab -- here on detecting error. |
+ `--------------------------------------*/
yyerrlab:
/* If not already recovering from an error, report this error. */
if (!yyerrstatus_)
}
#endif // YYDEBUG
-]b4_lex_symbol_if([], [b4_yytranslate_definition])[
+]b4_lex_symbol_if([], [b4_yytranslate_define])[
]b4_namespace_close[
]b4_epilogue[]dnl
m4_divert_pop(0)
projects / bison.git / blobdiff