# C++ skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-# Free Software Foundation, Inc.
+# 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
## Default values. ##
## ---------------- ##
-# Default parser class name.
b4_percent_define_default([[parser_class_name]], [[parser]])
-b4_percent_define_default([[location_type]], [[location]])
+
+# Don't do that so that we remember whether we're using a user
+# request, or the default value.
+#
+# b4_percent_define_default([[location_type]], [[location]])
+
b4_percent_define_default([[filename_type]], [[std::string]])
-b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
+b4_percent_define_default([[api.namespace]], m4_defn([b4_prefix]))
+
b4_percent_define_default([[global_tokens_and_yystype]], [[false]])
b4_percent_define_default([[define_location_comparison]],
[m4_if(b4_percent_define_get([[filename_type]]),
[std::string], [[true]], [[false]])])
+
## ----------- ##
## Namespace. ##
## ----------- ##
-m4_define([b4_namespace_ref], [b4_percent_define_get([[namespace]])])
+m4_define([b4_namespace_ref], [b4_percent_define_get([[api.namespace]])])
+
# Don't permit an empty b4_namespace_ref. Any `::parser::foo' appended to it
# would compile as an absolute reference with `parser' in the global namespace.
# include the header, which is always generated. If we ever need to permit
# internal linkage somehow, surely we can find a cleaner approach.
m4_if(m4_bregexp(b4_namespace_ref, [^[ ]*$]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference is empty]])])
# Instead of assuming the C++ compiler will do it, Bison should reject any
# Specifically, don't allow empty names as b4_namespace_open would just convert
# those into anonymous namespaces, and that might tempt some users.
m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*::]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference has consecutive "::"]])])
m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*$]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference has a trailing "::"]])])
m4_define([b4_namespace_open],
-[b4_user_code([b4_percent_define_get_syncline([[namespace]])
+[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
[^\(.\)[ ]*::], [\1])),
[::], [ { namespace ])[ {]])])
m4_define([b4_namespace_close],
-[b4_user_code([b4_percent_define_get_syncline([[namespace]])
-m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
- [^\(.\)[ ]*\(::\)?\([^][:]\|:[^][:]\)*],
+[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
+m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
+ [^\(.\)[ ]*\(::\)?\([^][:]\|:[^:]\)*],
[\1])),
- [::\([^][:]\|:[^][:]\)*], [} ])[} // ]b4_namespace_ref])])
+ [::\([^][:]\|:[^:]\)*], [} ])[} // ]b4_namespace_ref])])
# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
])
+
+
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
typedef YYSTYPE semantic_type;
#endif]b4_locations_if([
/// Symbol locations.
- typedef b4_percent_define_get([[location_type]]) location_type;])[
+ typedef b4_percent_define_get([[location_type]],
+ [[location]]) location_type;])[
+
+ /// Syntax errors thrown from user actions.
+ struct syntax_error : std::runtime_error
+ {
+ syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m);]b4_locations_if([
+ location_type location;])[
+ };
/// Tokens.
struct token
/// Default constructor.
inline symbol_type ();
- /// Constructor.
- inline symbol_type (]b4_args([int t],
+ /// Constructor for tokens with semantic value.
+ inline symbol_type (]b4_args([token_type t],
[const semantic_type& v],
b4_locations_if([const location_type& l]))[);
- inline symbol_type (]b4_args([int t],
+ /// Constructor for valueless tokens.
+ inline symbol_type (]b4_args([token_type t],
b4_locations_if([const location_type& l]))[);
/// The symbol type.
int type;
- /// Return the type corresponding to this state.
+ /// The symbol type.
inline int type_get_ () const;
- /// Its token.
+ /// The token.
inline token_type token () const;
};
]b4_symbol_constructor_declare])
# ----------------------
# Provide the implementation needed by the public types.
m4_define([b4_public_types_define],
-[[ // symbol_base_type.
+[[ inline
+ ]b4_parser_class_name[::syntax_error::syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m)
+ : std::runtime_error (m)]b4_locations_if([
+ , location (l)])[
+ {}
+
+ // symbol_base_type.
template <typename Exact>
+ inline
]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type ()
: value()]b4_locations_if([
, location()])[
}]b4_locations_if([[
template <typename Exact>
+ inline
]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (const location_type& l)
: value()
, location(l)
}]])[
template <typename Exact>
+ inline
]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (]b4_args(
[const semantic_type& v],
b4_locations_if([const location_type& l]))[)
}
template <typename Exact>
+ inline
const Exact&
]b4_parser_class_name[::symbol_base_type<Exact>::self () const
{
}
template <typename Exact>
+ inline
Exact&
]b4_parser_class_name[::symbol_base_type<Exact>::self ()
{
}
template <typename Exact>
+ inline
int
]b4_parser_class_name[::symbol_base_type<Exact>::type_get () const
{
}
// symbol_type.
+ inline
]b4_parser_class_name[::symbol_type::symbol_type ()
: super_type ()
, type ()
{
}
+ inline
]b4_parser_class_name[::symbol_type::symbol_type (]b4_args(
- [int t],
+ [token_type t],
b4_locations_if([const location_type& l]))[)
: super_type (]b4_locations_if([l])[)
- , type (t)
+ , type (yytranslate_ (t))
{
}
+ inline
]b4_parser_class_name[::symbol_type::symbol_type (]b4_args(
- [int t],
+ [token_type t],
[const semantic_type& v],
b4_locations_if([const location_type& l]))[)
: super_type (v]b4_locations_if([, l])[)
- , type (t)
+ , type (yytranslate_ (t))
{
}
+ inline
int
]b4_parser_class_name[::symbol_type::type_get_ () const
{
return type;
}
]b4_lex_symbol_if([[
+ inline
]b4_parser_class_name[::token_type
]b4_parser_class_name[::symbol_type::token () const
{
m4_define([b4_symbol_constructor_define], [])
+# b4_yytranslate_define
+# ---------------------
+# Define yytranslate_. Sometimes used in the header file,
+# sometimes in the cc file.
+m4_define([b4_yytranslate_define],
+[[ // 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_;
+ }
+]])
+
# b4_lhs_value([TYPE])
# --------------------
# Extra initialisations of the constructor.
m4_define([b4_parse_param_cons],
[m4_ifset([b4_parse_param],
- [
+ [
b4_cc_constructor_calls(b4_parse_param)])])
m4_define([b4_cc_constructor_calls],
- [m4_map_sep([b4_cc_constructor_call], [,
+ [m4_map_sep([b4_cc_constructor_call], [,
], [$@])])
m4_define([b4_cc_constructor_call],
- [$2 ($2_yyarg)])
+ [$2 ($2_yyarg)])
# b4_parse_param_vars
# -------------------
# Extra instance variables.
m4_define([b4_parse_param_vars],
[m4_ifset([b4_parse_param],
- [
+ [
/* User arguments. */
b4_cc_var_decls(b4_parse_param)])])
m4_define([b4_cc_var_decls],
- [m4_map_sep([b4_cc_var_decl], [
+ [m4_map_sep([b4_cc_var_decl], [
], [$@])])
m4_define([b4_cc_var_decl],
- [ $1;])
+ [ $1;])
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