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typedruby.ypp
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typedruby.ypp
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%require "3.0"
%skeleton "lalr1.cc"
%token-table
%code requires {
#include <ruby_parser/builder.hh>
#include <ruby_parser/node.hh>
#include <ruby_parser/token.hh>
#include <ruby_parser/lexer.hh>
#include <ruby_parser/driver.hh>
#include <ruby_parser/state_stack.hh>
#include <iterator>
#include <utility>
#include <cstdlib>
using namespace ruby_parser;
using namespace std::string_literals;
#ifndef YY_NULLPTR
#define YY_NULLPTR nullptr
#endif
}
%param { ruby_parser::typedruby27& driver }
%parse-param { ruby_parser::SelfPtr self }
%define api.namespace {ruby_parser::bison::typedruby27}
%define api.prefix {typedruby27}
%define api.value.type { union parser_value }
%define api.token.constructor false
%define parse.assert
%define parse.error verbose
// mirrored in inc/ruby_parser/token.hh
// if any of these token values are changed here, the header must be updated
// as well.
%token <token>
eof 0 "end of file"
kCLASS 1001 "class"
kMODULE 1002 "module"
kDEF 1003 "def"
kUNDEF 1004 "undef"
kBEGIN 1005 "begin"
kRESCUE 1006 "rescue"
kENSURE 1007 "ensure"
kEND 1008 "end"
kIF 1009 "if"
kUNLESS 1010 "unless"
kTHEN 1011 "then"
kELSIF 1012 "elsif"
kELSE 1013 "else"
kCASE 1014 "case"
kWHEN 1015 "when"
kWHILE 1016 "while"
kUNTIL 1017 "until"
kFOR 1018 "for"
kBREAK 1019 "break"
kNEXT 1020 "next"
kREDO 1021 "redo"
kRETRY 1022 "retry"
kIN 1023 "in"
kDO 1024 "do"
kDO_COND 1025
kDO_BLOCK 1026
kDO_LAMBDA 1027
kRETURN 1028 "return"
kYIELD 1029 "yield"
kSUPER 1030 "super"
kSELF 1031 "self"
kNIL 1032 "nil"
kTRUE 1033 "true"
kFALSE 1034 "false"
kAND 1035 "and"
kOR 1036 "or"
kNOT 1037 "not"
kIF_MOD 1038
kUNLESS_MOD 1039
kWHILE_MOD 1040
kUNTIL_MOD 1041
kRESCUE_MOD 1042
kALIAS 1043 "alias"
kDEFINED 1044 "defined?"
klBEGIN 1045 "BEGIN"
klEND 1046 "END"
k__LINE__ 1047 "__LINE__"
k__FILE__ 1048 "__FILE__"
k__ENCODING__ 1049 "__ENCODING__"
tIDENTIFIER 1050
tFID 1051
tGVAR 1052
tIVAR 1053
tCONSTANT 1054
tLABEL 1055
tCVAR 1056
tNTH_REF 1057
tBACK_REF 1058
tSTRING_CONTENT 1059
tINTEGER 1060
tFLOAT 1061
tUPLUS 1062
tUMINUS 1063
tUNARY_NUM 1064
tPOW 1065
tCMP 1066 "<=>"
tEQ 1067 "=="
tEQQ 1068 "==="
tNEQ 1069 "!="
tEQL 1070 "="
tGEQ 1071 ">="
tLEQ 1072 "<="
tANDOP 1073 "&&"
tOROP 1074 "||"
tMATCH 1075 "=~"
tNMATCH 1076 "!~"
tDOT 1077 "."
tDOT2 1078 ".."
tDOT3 1079 "..."
tAREF 1080 "[]"
tASET 1081 "[]="
tLSHFT 1082 "<<"
tRSHFT 1083 ">>"
tCOLON2 1084 "::"
tCOLON3 1085
tOP_ASGN 1086
tASSOC 1087 "=>"
tLPAREN 1088 "("
tLPAREN2 1089
tRPAREN 1090 ")"
tLPAREN_ARG 1091
tLBRACK 1092 "["
tLBRACK2 1093
tRBRACK 1094 "]"
tLBRACE 1095 "{"
tLBRACE_ARG 1096
tSTAR 1097 "*"
tSTAR2 1098
tAMPER 1099 "&"
tAMPER2 1100
tTILDE 1101 "~"
tPERCENT 1102 "%"
tDIVIDE 1103 "/"
tDSTAR 1104 "**"
tPLUS 1105 "+"
tMINUS 1106 "-"
tLT 1107 "<"
tGT 1108 ">"
tPIPE 1109 "|"
tBANG 1110 "!"
tCARET 1111 "^"
tLCURLY 1112
tRCURLY 1113
tBACK_REF2 1114 "`"
tSYMBEG 1115
tSTRING_BEG 1116
tXSTRING_BEG 1117
tREGEXP_BEG 1118
tREGEXP_OPT 1119
tWORDS_BEG 1120
tQWORDS_BEG 1121
tSYMBOLS_BEG 1122
tQSYMBOLS_BEG 1123
tSTRING_DBEG 1124
tSTRING_DVAR 1125
tSTRING_END 1126
tSTRING_DEND 1127
tSTRING 1128
tSYMBOL 1129
tNL 1130
tEH 1131 "?"
tCOLON 1132 ":"
tCOMMA 1133 ","
tSPACE 1134
tSEMI 1135 ";"
tLAMBDA 1136 "->"
tLAMBEG 1137
tCHARACTER 1138
tRATIONAL 1139
tIMAGINARY 1140
tLABEL_END 1141
tANDDOT 1142 "&."
tRATIONAL_IMAGINARY 1143
tFLOAT_IMAGINARY 1144
;
%type <node>
arg
arg_rhs
arg_value
assoc
backref
block_arg
block_call
block_command
block_param_def
bodystmt
bvar
command
command_asgn
command_call
command_rhs
compstmt
cpath
dsym
expr
expr_value
f_arg_item
f_arglist
f_block_kw
f_block_opt
f_kw
f_larglist
f_marg
f_opt
f_rest_marg
fitem
for_var
keyword_variable
lhs
literal
method_call
mlhs
mlhs_inner
mlhs_item
mlhs_node
mrhs_arg
none
numeric
opt_block_param
primary
primary_value
qsymbols
qwords
regexp
ssym
simple_numeric
singleton
stmt
stmt_or_begin
string1
string_content
string_dvar
strings
symbol
symbols
top_compstmt
top_stmt
user_variable
var_lhs
var_ref
words
xstring
rel_expr
%type <list>
aref_args
args
args_tail
assoc_list
assocs
block_args_tail
block_param
bv_decls
call_args
command_args
exc_list
f_arg
f_args
f_block_arg
f_block_kwarg
f_block_optarg
f_kwarg
f_kwrest
f_marg_list
f_margs
f_optarg
f_no_kwarg
f_rest_arg
list_none
mlhs_basic
mlhs_head
mlhs_post
mrhs
opt_args_tail
opt_block_arg
opt_block_args_tail
opt_bv_decl
opt_call_args
opt_f_block_arg
opt_rescue
qsym_list
qword_list
regexp_contents
stmts
string
string_contents
symbol_list
top_stmts
undef_list
word
word_list
xstring_contents
%type <token>
blkarg_mark
call_op
cname
do
dot_or_colon
f_arg_asgn
f_bad_arg
f_label
f_norm_arg
fcall
fname
kwrest_mark
op
operation
operation2
operation3
rbracket
restarg_mark
reswords
rparen
term
then
relop
k_return
%type <delimited_list>
opt_paren_args
paren_args
%type <delimited_block>
brace_block
brace_body
cmd_brace_block
do_block
do_body
lambda
lambda_body
begin_block
%type <with_token>
exc_var
if_tail
opt_else
opt_ensure
superclass
expr_value_do
%type <case_body>
case_body
cases
%nonassoc tLOWEST
%nonassoc tLBRACE_ARG
%nonassoc kIF_MOD kUNLESS_MOD kWHILE_MOD kUNTIL_MOD
%left kOR kAND
%right kNOT
%nonassoc kDEFINED
%right tEQL tOP_ASGN
%left kRESCUE_MOD
%right tEH tCOLON
%nonassoc tDOT2 tDOT3
%left tOROP
%left tANDOP
%nonassoc tCMP tEQ tEQQ tNEQ tMATCH tNMATCH
%left tGT tGEQ tLT tLEQ
%left tPIPE tCARET
%left tAMPER2
%left tLSHFT tRSHFT
%left tPLUS tMINUS
%left tSTAR2 tDIVIDE tPERCENT
%right tUNARY_NUM tUMINUS
%right tPOW
%right tBANG tTILDE tUPLUS
%code requires {
union parser_value {
ruby_parser::token *token;
ruby_parser::delimited_node_list *delimited_list;
ruby_parser::delimited_block *delimited_block;
ruby_parser::node_with_token *with_token;
ruby_parser::case_body *case_body;
ruby_parser::ForeignPtr node;
ruby_parser::node_list *list;
ruby_parser::state_stack *stack;
size_t size;
bool boolean;
};
}
%code {
namespace ruby_parser {
namespace bison {
namespace typedruby27 {
#define DIAGCHECK() do { \
if (driver.pending_error) { \
driver.pending_error = false; \
YYERROR; \
} \
} while(false);
void parser::error(const std::string &msg) {
std::string error_message = msg;
int token_type = static_cast<int>(driver.last_token->type());
const char* token_str_name = yytname_[yytranslate_(token_type)];
if (token_str_name != nullptr) {
error_message = token_str_name;
}
driver.diagnostics.emplace_back(
dlevel::ERROR, dclass::UnexpectedToken,
diagnostic::range(driver.lex.last_token_s, driver.lex.last_token_e),
error_message);
}
int yylex(parser::semantic_type *lval, ruby_parser::typedruby27 &driver) {
auto token = driver.lex.advance();
driver.last_token = token;
int token_type = static_cast<int>(token->type());
assert(token_type >= 0);
lval->token = token;
return token_type;
}
}}} // namespace
} // %code
%%
program: top_compstmt
{
driver.ast = $1;
}
top_compstmt: top_stmts opt_terms
{
$$ = driver.build.compstmt(self, $1);
}
top_stmts: // nothing
{
$$ = driver.alloc.node_list();
}
| top_stmt
{
$$ = driver.alloc.node_list($1);
}
| top_stmts terms top_stmt
{
$1->emplace_back($3);
$$ = $1;
}
| error top_stmt
{
$$ = driver.alloc.node_list($2);
}
top_stmt: stmt
| klBEGIN begin_block
{
auto &delimited_block = $2;
$$ = driver.build.preexe(self, $1, delimited_block->body, delimited_block->end);
}
begin_block: tLCURLY top_compstmt tRCURLY
{
$$ = driver.alloc.delimited_block($1, nullptr, $2, $3);
}
bodystmt: compstmt opt_rescue opt_else opt_ensure
{
auto &rescueBodies = $2;
auto &else_ = $3;
auto &ensure = $4;
if (rescueBodies->size() == 0 && else_ != nullptr) {
driver.diagnostics.emplace_back(
dlevel::ERROR,
dclass::UselessElse,
else_->tok
);
}
$$ = driver.build.beginBody(
self,
$1,
rescueBodies,
else_ ? else_->tok : nullptr,
else_ ? else_->nod : nullptr,
ensure ? ensure->tok : nullptr,
ensure ? ensure->nod : nullptr
);
}
compstmt: stmts opt_terms
{
$$ = driver.build.compstmt(self, $1);
}
stmts: // nothing
{
$$ = driver.alloc.node_list();
}
| stmt_or_begin
{
$$ = driver.alloc.node_list($1);
}
| stmts terms stmt_or_begin
{
$1->emplace_back($3);
$$ = $1;
}
| error
{
$$ = driver.alloc.node_list();
}
stmt_or_begin: stmt
| klBEGIN begin_block
{
driver.diagnostics.emplace_back(
dlevel::ERROR,
dclass::BeginInMethod,
$1
);
YYERROR;
}
stmt: kALIAS fitem
{
driver.lex.set_state_expr_fname();
}
fitem
{
$$ = driver.build.alias(self, $1, $2, $4);
}
| kALIAS tGVAR tGVAR
{
$$ = driver.build.alias(self, $1, driver.build.gvar(self, $2), driver.build.gvar(self, $3));
}
| kALIAS tGVAR tBACK_REF
{
$$ = driver.build.alias(self, $1, driver.build.gvar(self, $2), driver.build.backRef(self, $3));
}
| kALIAS tGVAR tNTH_REF
{
driver.diagnostics.emplace_back(dlevel::ERROR, dclass::NthRefAlias, $3);
YYERROR;
}
| kUNDEF undef_list
{
$$ = driver.build.undefMethod(self, $1, $2);
}
| stmt kIF_MOD expr_value
{
$$ = driver.build.conditionMod(self, $1, nullptr, $3);
}
| stmt kUNLESS_MOD expr_value
{
$$ = driver.build.conditionMod(self, nullptr, $1, $3);
}
| stmt kWHILE_MOD expr_value
{
$$ = driver.build.loop_while_mod(self, $1, $3);
}
| stmt kUNTIL_MOD expr_value
{
$$ = driver.build.loopUntil_mod(self, $1, $3);
}
| stmt kRESCUE_MOD stmt
{
ruby_parser::node_list rescue_body(
driver.build.rescue_body(self, $2, nullptr, nullptr, nullptr, nullptr, $3));
$$ = driver.build.beginBody(self, $1, &rescue_body, nullptr, nullptr, nullptr, nullptr);
}
| klEND tLCURLY compstmt tRCURLY
{
$$ = driver.build.postexe(self, $1, $3, $4);
}
| command_asgn
| mlhs tEQL command_call
{
$$ = driver.build.multi_assign(self, $1, $3);
}
| lhs tEQL mrhs
{
$$ = driver.build.assign(self, $1, $2, driver.build.array(self, nullptr, $3, nullptr));
}
| mlhs tEQL mrhs_arg kRESCUE_MOD stmt
{
ruby_parser::node_list rescue_body(
driver.build.rescue_body(self, $4, nullptr, nullptr, nullptr, nullptr, $5));
auto begin_body = driver.build.beginBody(self, $3, &rescue_body, nullptr, nullptr, nullptr, nullptr);
$$ = driver.build.multi_assign(self, $1, begin_body);
}
| mlhs tEQL mrhs_arg
{
$$ = driver.build.multi_assign(self, $1, $3);
}
| expr
command_asgn: lhs tEQL command_rhs
{
$$ = driver.build.assign(self, $1, $2, $3);
}
| var_lhs tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, $1, $2, $3);
DIAGCHECK();
}
| primary_value tLBRACK2 opt_call_args rbracket tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, driver.build.index(self, $1, $2, $3, $4), $5, $6);
DIAGCHECK();
}
| primary_value call_op tIDENTIFIER tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, driver.build.call_method(self, $1, $2, $3, nullptr, nullptr, nullptr), $4, $5);
DIAGCHECK();
}
| primary_value call_op tCONSTANT tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, driver.build.call_method(self, $1, $2, $3, nullptr, nullptr, nullptr), $4, $5);
DIAGCHECK();
}
| primary_value tCOLON2 tCONSTANT tOP_ASGN command_rhs
{
auto const_node = driver.build.constOpAssignable(self, driver.build.constFetch(self, $1, $2, $3));
$$ = driver.build.op_assign(self, const_node, $4, $5);
DIAGCHECK();
}
| primary_value tCOLON2 tIDENTIFIER tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, driver.build.call_method(self, $1, $2, $3, nullptr, nullptr, nullptr), $4, $5);
DIAGCHECK();
}
| backref tOP_ASGN command_rhs
{
$$ = driver.build.op_assign(self, $1, $2, $3);
DIAGCHECK();
}
command_rhs: command_call %prec tOP_ASGN
| command_call kRESCUE_MOD stmt
{
node_list rescue_body(
driver.build.rescue_body(self, $2, nullptr, nullptr, nullptr, nullptr, $3)
);
$$ = driver.build.beginBody(self, $1, &rescue_body, nullptr, nullptr, nullptr, nullptr);
}
| command_asgn
expr: command_call
| expr kAND expr
{
$$ = driver.build.logicalAnd(self, $1, $2, $3);
}
| expr kOR expr
{
$$ = driver.build.logicalOr(self, $1, $2, $3);
}
| kNOT opt_nl expr
{
$$ = driver.build.not_op(self, $1, nullptr, $3, nullptr);
}
| tBANG command_call
{
$$ = driver.build.not_op(self, $1, nullptr, $2, nullptr);
}
| arg
expr_value: expr
expr_value_do: {
driver.lex.cond.push(true);
}
expr_value do
{
driver.lex.cond.pop();
$$ = driver.alloc.node_with_token($3, $2);
}
command_call: command
| block_command
block_command: block_call
| block_call dot_or_colon operation2 command_args
{
$$ = driver.build.call_method(self, $1, $2, $3, nullptr, $4, nullptr);
}
cmd_brace_block: tLBRACE_ARG
{
driver.lex.context.push(Context::State::BLOCK);
}
brace_body tRCURLY
{
auto &block = $3;
block->begin = $1;
block->end = $4;
$$ = block;
driver.lex.context.pop();
}
fcall: operation
command: fcall command_args %prec tLOWEST
{
$$ = driver.build.call_method(self, nullptr, nullptr, $1, nullptr, $2, nullptr);
}
| fcall command_args cmd_brace_block
{
auto method_call = driver.build.call_method(self, nullptr, nullptr, $1, nullptr, $2, nullptr);
auto &delimited_block = $3;
$$ = driver.build.block(self, method_call,
delimited_block->begin,
delimited_block->args,
delimited_block->body,
delimited_block->end);
DIAGCHECK();
}
| primary_value call_op operation2 command_args %prec tLOWEST
{
$$ = driver.build.call_method(self, $1, $2, $3, nullptr, $4, nullptr);
}
| primary_value call_op operation2 command_args cmd_brace_block
{
auto method_call = driver.build.call_method(self, $1, $2, $3, nullptr, $4, nullptr);
auto &delimited_block = $5;
$$ = driver.build.block(self, method_call,
delimited_block->begin,
delimited_block->args,
delimited_block->body,
delimited_block->end);
DIAGCHECK();
}
| primary_value tCOLON2 operation2 command_args %prec tLOWEST
{
$$ = driver.build.call_method(self, $1, $2, $3, nullptr, $4, nullptr);
}
| primary_value tCOLON2 operation2 command_args cmd_brace_block
{
auto method_call = driver.build.call_method(self, $1, $2, $3, nullptr, $4, nullptr);
auto &delimited_block = $5;
$$ = driver.build.block(self, method_call,
delimited_block->begin,
delimited_block->args,
delimited_block->body,
delimited_block->end);
DIAGCHECK();
}
| kSUPER command_args
{
$$ = driver.build.keywordSuper(self, $1, nullptr, $2, nullptr);
}
| kYIELD command_args
{
$$ = driver.build.keywordYield(self, $1, nullptr, $2, nullptr);
DIAGCHECK();
}
| k_return call_args
{
$$ = driver.build.keywordReturn(self, $1, nullptr, $2, nullptr);
}
| kBREAK call_args
{
$$ = driver.build.keywordBreak(self, $1, nullptr, $2, nullptr);
}
| kNEXT call_args
{
$$ = driver.build.keywordNext(self, $1, nullptr, $2, nullptr);
}
mlhs: mlhs_basic
{
$$ = driver.build.multi_lhs(self, nullptr, $1, nullptr);
}
| tLPAREN mlhs_inner rparen
{
$$ = driver.build.begin(self, $1, $2, $3);
}
mlhs_inner: mlhs_basic
{
$$ = driver.build.multi_lhs(self, nullptr, $1, nullptr);
}
| tLPAREN mlhs_inner rparen
{
$$ = driver.build.multi_lhs1(self, $1, $2, $3);
}
mlhs_basic: mlhs_head
| mlhs_head mlhs_item
{
auto &list = $1;
list->emplace_back($2);
$$ = list;
}
| mlhs_head tSTAR mlhs_node
{
auto &list = $1;
list->emplace_back(driver.build.splat_mlhs(self, $2, $3));
$$ = list;
}
| mlhs_head tSTAR mlhs_node tCOMMA mlhs_post
{
auto &head = $1;
head->emplace_back(driver.build.splat_mlhs(self, $2, $3));
head->concat($5);
$$ = head;
}
| mlhs_head tSTAR
{
auto &list = $1;
list->emplace_back(driver.build.splat_mlhs(self, $2, nullptr));
$$ = list;
}
| mlhs_head tSTAR tCOMMA mlhs_post
{
auto &head = $1;
head->emplace_back(driver.build.splat_mlhs(self, $2, nullptr));
head->concat($4);
$$ = head;
}
| tSTAR mlhs_node
{
$$ = driver.alloc.node_list(driver.build.splat_mlhs(self, $1, $2));
}
| tSTAR mlhs_node tCOMMA mlhs_post
{
node_list *items = driver.alloc.node_list(driver.build.splat_mlhs(self, $1, $2));
items->concat($4);
$$ = items;
}
| tSTAR
{
$$ = driver.alloc.node_list(driver.build.splat_mlhs(self, $1, nullptr));
}
| tSTAR tCOMMA mlhs_post
{
node_list *items = driver.alloc.node_list(driver.build.splat_mlhs(self, $1, nullptr));
items->concat($3);
$$ = items;
}
mlhs_item: mlhs_node
| tLPAREN mlhs_inner rparen
{
$$ = driver.build.begin(self, $1, $2, $3);
}
mlhs_head: mlhs_item tCOMMA
{
$$ = driver.alloc.node_list($1);
}
| mlhs_head mlhs_item tCOMMA
{
auto &list = $1;
list->emplace_back($2);
$$ = list;
}
mlhs_post: mlhs_item
{
$$ = driver.alloc.node_list($1);
}
| mlhs_post tCOMMA mlhs_item
{
auto &list = $1;
list->emplace_back($3);
$$ = list;
}
mlhs_node: user_variable
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
| keyword_variable
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
| primary_value tLBRACK2 opt_call_args rbracket
{
$$ = driver.build.indexAsgn(self, $1, $2, $3, $4);
}
| primary_value call_op tIDENTIFIER
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, true);
}
| primary_value tCOLON2 tIDENTIFIER
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, false);
}
| primary_value call_op tCONSTANT
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, true);
}
| primary_value tCOLON2 tCONSTANT
{
$$ = driver.build.assignable(self, driver.build.constFetch(self, $1, $2, $3));
DIAGCHECK();
}
| tCOLON3 tCONSTANT
{
$$ = driver.build.assignable(self, driver.build.constGlobal(self, $1, $2));
DIAGCHECK();
}
| backref
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
lhs: user_variable
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
| keyword_variable
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
| primary_value tLBRACK2 opt_call_args rbracket
{
$$ = driver.build.indexAsgn(self, $1, $2, $3, $4);
}
| primary_value call_op tIDENTIFIER
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, false);
}
| primary_value tCOLON2 tIDENTIFIER
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, false);
}
| primary_value call_op tCONSTANT
{
$$ = driver.build.attrAsgn(self, $1, $2, $3, false);
}
| primary_value tCOLON2 tCONSTANT
{
$$ = driver.build.assignable(self, driver.build.constFetch(self, $1, $2, $3));
DIAGCHECK();
}
| tCOLON3 tCONSTANT
{
$$ = driver.build.assignable(self, driver.build.constGlobal(self, $1, $2));
DIAGCHECK();
}
| backref
{
$$ = driver.build.assignable(self, $1);
DIAGCHECK();
}
cname: tIDENTIFIER
{
driver.diagnostics.emplace_back(dlevel::ERROR, dclass::ModuleNameConst, $1);
YYERROR;
}
| tCONSTANT
cpath: tCOLON3 cname
{
$$ = driver.build.constGlobal(self, $1, $2);
}
| cname
{
$$ = driver.build.const_(self, $1);
}
| primary_value tCOLON2 cname
{
$$ = driver.build.constFetch(self, $1, $2, $3);
}
fname: tIDENTIFIER | tCONSTANT | tFID
| op
| reswords
fitem: fname
{
$$ = driver.build.symbol(self, $1);
}
| symbol
undef_list: fitem
{
$$ = driver.alloc.node_list($1);
}
| undef_list tCOMMA
{
driver.lex.set_state_expr_fname();