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c++: improvements on symbol kinds

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Instead of

    /// (Internal) symbol kind.
    enum symbol_kind_type
    {
      YYNTOKENS = 5, ///< Number of tokens.
      YYSYMBOL_YYEMPTY = -2,
      YYSYMBOL_YYEOF = 0,                      // END_OF_FILE
      YYSYMBOL_YYERROR = 1,                    // error
      YYSYMBOL_YYUNDEF = 2,                    // $undefined
      YYSYMBOL_TEXT = 3,                       // TEXT
      YYSYMBOL_NUMBER = 4,                     // NUMBER
      YYSYMBOL_YYACCEPT = 5,                   // $accept
      YYSYMBOL_result = 6,                     // result
      YYSYMBOL_list = 7,                       // list
      YYSYMBOL_item = 8                        // item
    };

generate

    /// Symbol kinds.
    struct symbol_kind
    {
      enum symbol_kind_type
      {
        YYNTOKENS = 5, ///< Number of tokens.
        S_YYEMPTY = -2,
        S_YYEOF = 0,                             // END_OF_FILE
        S_YYERROR = 1,                           // error
        S_YYUNDEF = 2,                           // $undefined
        S_TEXT = 3,                              // TEXT
        S_NUMBER = 4,                            // NUMBER
        S_YYACCEPT = 5,                          // $accept
        S_result = 6,                            // result
        S_list = 7,                              // list
        S_item = 8                               // item
      };
    };

* data/skeletons/c++.m4 (api.symbol.prefix): Define to S_.
Adjust all the uses.
(b4_public_types_declare): Nest the enum inside 'struct symbol_kind'.
* data/skeletons/glr.cc, data/skeletons/lalr1.cc,
* tests/headers.at, tests/local.at: Adjust.
This commit is contained in:
Akim Demaille
2020-04-09 08:19:40 +02:00
parent 6c5f690da4
commit 00a654c8ad
5 changed files with 38 additions and 26 deletions
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36
data/skeletons/c++.m4
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@@ -22,6 +22,8 @@ b4_percent_define_ifdef([[api.value.union.name]],
[b4_complain_at(b4_percent_define_get_loc([[api.value.union.name]]),
[named %union is invalid in C++])])
b4_percent_define_default([[api.symbol.prefix]], [[S_]])
m4_include(b4_skeletonsdir/[c.m4])
b4_percent_define_check_kind([api.namespace], [code], [deprecated])
@@ -187,12 +189,11 @@ m4_define([b4_token_enums],
# to use a signed type, which matters for yytoken.
m4_define([b4_declare_symbol_enum],
[[enum symbol_kind_type
{
YYNTOKENS = ]b4_tokens_number[, ///< Number of tokens.
]b4_symbol_kind([-2])[ = -2,
]b4_symbol_foreach([ b4_symbol_enum])[
};
]])
{
YYNTOKENS = ]b4_tokens_number[, ///< Number of tokens.
]b4_symbol_kind([-2])[ = -2,
]b4_symbol_foreach([ b4_symbol_enum])dnl
[ };]])
@@ -252,7 +253,7 @@ m4_define([b4_public_types_declare],
location_type location;])[
};
/// Token numbers.
/// Token kinds.
struct token
{
]b4_token_enums[
@@ -261,8 +262,17 @@ m4_define([b4_public_types_declare],
/// (External) token kind, as returned by yylex.
typedef token::yytokentype token_type;
/// Symbol kinds.
struct symbol_kind
{
]b4_declare_symbol_enum[
};
/// (Internal) symbol kind.
]b4_declare_symbol_enum[
typedef symbol_kind::symbol_kind_type symbol_kind_type;
/// The number of tokens.
static const symbol_kind_type YYNTOKENS = symbol_kind::YYNTOKENS;
]])
@@ -456,7 +466,7 @@ m4_define([b4_public_types_define],
bool
]b4_parser_class[::basic_symbol<Base>::empty () const YY_NOEXCEPT
{
return Base::type_get () == ]b4_symbol_prefix[YYEMPTY;
return Base::type_get () == symbol_kind::]b4_symbol_prefix[YYEMPTY;
}
template <typename Base>
@@ -472,7 +482,7 @@ m4_define([b4_public_types_define],
// by_type.
]b4_inline([$1])b4_parser_class[::by_type::by_type ()
: type (]b4_symbol_prefix[YYEMPTY)
: type (symbol_kind::]b4_symbol_prefix[YYEMPTY)
{}
#if 201103L <= YY_CPLUSPLUS
@@ -494,7 +504,7 @@ m4_define([b4_public_types_define],
]b4_inline([$1])[void
]b4_parser_class[::by_type::clear ()
{
type = ]b4_symbol_prefix[YYEMPTY;
type = symbol_kind::]b4_symbol_prefix[YYEMPTY;
}
]b4_inline([$1])[void
@@ -540,11 +550,11 @@ m4_define([b4_yytranslate_define],
const int user_token_number_max_ = ]b4_user_token_number_max[;
if (t <= 0)
return ]b4_symbol_prefix[YYEOF;
return symbol_kind::]b4_symbol_prefix[YYEOF;
else if (t <= user_token_number_max_)
return YY_CAST (symbol_kind_type, translate_table[t]);
else
return ]b4_symbol_prefix[YYUNDEF;]])[
return symbol_kind::]b4_symbol_prefix[YYUNDEF;]])[
}
]])