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symbol::token.

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This is allows the user to get the type of a token return by
yylex.

	* data/lalr1.cc (symbol::token): New.
	(yytoknum_): Define when %define lex_symbol, independently of
	%debug.
	(yytoken_number_): Move into...
	(symbol::token): here, since that's the only use.
	The other one is YYPRINT which was not officially supported
	by lalr1.cc, and anyway it did not work since YYPRINT uses this
	array under a different name (yytoknum).
This commit is contained in:
Akim Demaille
2008-09-01 10:51:46 +02:00
parent fc2476c7cd
commit 202598d3ab
2 changed files with 33 additions and 9 deletions
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27
data/lalr1.cc
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@@ -346,6 +346,21 @@ m4_define([b4_symbol_constructor_definitions],
{
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.
@@ -727,9 +742,6 @@ m4_ifdef([b4_stype],
#if YYDEBUG
/// For each rule, its source line number.
static const ]b4_int_type_for([b4_rline])[ yyrline_[];
/// (External) token number corresponding to the (internal) symbol
/// number (which must be that of a token).
static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[];
/// Report on the debug stream that the rule \a r is going to be reduced.
virtual void yy_reduce_print_ (int r);
/// Print the state stack on the debug stream.
@@ -810,6 +822,9 @@ m4_ifdef([b4_stype],
/// Return the type corresponding to this state.
inline int type_get_ () const;
/// Its token.
inline token_type token () const;
};
]b4_symbol_constructor_declarations[
@@ -1564,12 +1579,6 @@ b4_error_verbose_if([int yystate, int yytoken],
symbol of state STATE-NUM. */
]b4_table_define([stos], [b4_stos])[;
#if YYDEBUG
/* YYTOKNUM[NUM] -- (External) token number corresponding to the
(internal) symbol number NUM (which must be that of a token). */
]b4_table_define([token_number], [b4_toknum])[;
#endif
/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
]b4_table_define([r1], [b4_r1])[;