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lalr1.cc: provide %printer-based syntax-error messages.

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* data/c++.m4: .
	* data/lalr1.cc: .
	* data/variant.hh: .
This commit is contained in:
Akim Demaille
2009-08-26 11:16:04 +02:00
parent a57ca64a80
commit 2b63a84a5b
3 changed files with 94 additions and 37 deletions
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72
data/c++.m4
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@@ -148,6 +148,16 @@ m4_define([b4_public_types_declare],
[const semantic_type& v],
b4_locations_if([const location_type& l]))[);
/// Release the memory allocated to members.
/// Reclaim the semantic value using the %destructor directive.
void clear ();
/// Print the semantic value using the %printer directive.
std::ostream& print (std::ostream& o) const;
/// Print everything about the symbol (type, value, location).
std::ostream& dump (std::ostream& o) const;
/// Return this with its exact type.
const Exact& self () const;
Exact& self ();
@@ -155,6 +165,11 @@ m4_define([b4_public_types_declare],
/// Return the type of this symbol.
int type_get () const;
#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
/// The name for the type.
const char *type_name () const;
#endif
/// The semantic value.
semantic_type value;]b4_locations_if([
@@ -186,7 +201,7 @@ m4_define([b4_public_types_declare],
inline int type_get_ () const;
/// Its token.
inline token_type token () const;
token_type token () const;
};
]b4_symbol_constructor_declare])
@@ -219,6 +234,53 @@ m4_define([b4_public_types_define],
{
}
template <typename Exact>
void
]b4_parser_class_name[::symbol_base_type<Exact>::clear ()
{
int yytype = type_get ();
// User destructor.
switch (yytype)
{
]b4_symbol_foreach([b4_symbol_destructor])dnl
[ default:
break;
}]b4_variant_if([
// Type destructor.
b4_symbol_variant([[yytype]], [[value]], [[template destroy]])])[
}
template <typename Exact>
std::ostream&
]b4_parser_class_name[::symbol_base_type<Exact>::print (std::ostream& yystream) const
{
#define debug_stream() yystream
switch (type_get ())
{
]b4_symbol_foreach([b4_symbol_printer])dnl
[ default:
break;
}
#undef debug_stream
return yystream;
}
template <typename Exact>
std::ostream&
]b4_parser_class_name[::symbol_base_type<Exact>::dump (std::ostream& yystream) const
{
int yytype = type_get ();
yystream << (yytype < yyntokens_ ? "token" : "nterm")
#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
<< ' ' << type_name ()
#endif
<< " ("]b4_locations_if([
<< location << ": "])[;
print (yystream);
return yystream << ')';
}
template <typename Exact>
const Exact&
]b4_parser_class_name[::symbol_base_type<Exact>::self () const
@@ -240,6 +302,14 @@ m4_define([b4_public_types_define],
return self ().type_get_ ();
}
#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
template <typename Exact>
const char *
]b4_parser_class_name[::symbol_base_type<Exact>::type_name () const
{
return ]b4_parser_class_name[::yytname_[type_get ()];
}
#endif
// symbol_type.
]b4_parser_class_name[::symbol_type::symbol_type ()
: super_type ()