| Current File : //home/tradevaly/prioyshi.com/project/vendor/nikic/php-parser/grammar/php7.y |
%pure_parser
%expect 2
%tokens
%%
start:
top_statement_list { $$ = $this->handleNamespaces($1); }
;
top_statement_list_ex:
top_statement_list_ex top_statement { pushNormalizing($1, $2); }
| /* empty */ { init(); }
;
top_statement_list:
top_statement_list_ex
{ makeZeroLengthNop($nop, $this->lookaheadStartAttributes);
if ($nop !== null) { $1[] = $nop; } $$ = $1; }
;
reserved_non_modifiers:
T_INCLUDE | T_INCLUDE_ONCE | T_EVAL | T_REQUIRE | T_REQUIRE_ONCE | T_LOGICAL_OR | T_LOGICAL_XOR | T_LOGICAL_AND
| T_INSTANCEOF | T_NEW | T_CLONE | T_EXIT | T_IF | T_ELSEIF | T_ELSE | T_ENDIF | T_ECHO | T_DO | T_WHILE
| T_ENDWHILE | T_FOR | T_ENDFOR | T_FOREACH | T_ENDFOREACH | T_DECLARE | T_ENDDECLARE | T_AS | T_TRY | T_CATCH
| T_FINALLY | T_THROW | T_USE | T_INSTEADOF | T_GLOBAL | T_VAR | T_UNSET | T_ISSET | T_EMPTY | T_CONTINUE | T_GOTO
| T_FUNCTION | T_CONST | T_RETURN | T_PRINT | T_YIELD | T_LIST | T_SWITCH | T_ENDSWITCH | T_CASE | T_DEFAULT
| T_BREAK | T_ARRAY | T_CALLABLE | T_EXTENDS | T_IMPLEMENTS | T_NAMESPACE | T_TRAIT | T_INTERFACE | T_CLASS
| T_CLASS_C | T_TRAIT_C | T_FUNC_C | T_METHOD_C | T_LINE | T_FILE | T_DIR | T_NS_C | T_HALT_COMPILER | T_FN
| T_MATCH
;
semi_reserved:
reserved_non_modifiers
| T_STATIC | T_ABSTRACT | T_FINAL | T_PRIVATE | T_PROTECTED | T_PUBLIC
;
identifier_ex:
T_STRING { $$ = Node\Identifier[$1]; }
| semi_reserved { $$ = Node\Identifier[$1]; }
;
identifier:
T_STRING { $$ = Node\Identifier[$1]; }
;
reserved_non_modifiers_identifier:
reserved_non_modifiers { $$ = Node\Identifier[$1]; }
;
namespace_declaration_name:
T_STRING { $$ = Name[$1]; }
| semi_reserved { $$ = Name[$1]; }
| T_NAME_QUALIFIED { $$ = Name[$1]; }
;
namespace_name:
T_STRING { $$ = Name[$1]; }
| T_NAME_QUALIFIED { $$ = Name[$1]; }
;
legacy_namespace_name:
namespace_name { $$ = $1; }
| T_NAME_FULLY_QUALIFIED { $$ = Name[substr($1, 1)]; }
;
plain_variable:
T_VARIABLE { $$ = Expr\Variable[parseVar($1)]; }
;
semi:
';' { /* nothing */ }
| error { /* nothing */ }
;
no_comma:
/* empty */ { /* nothing */ }
| ',' { $this->emitError(new Error('A trailing comma is not allowed here', attributes())); }
;
optional_comma:
/* empty */
| ','
;
attribute_decl:
class_name { $$ = Node\Attribute[$1, []]; }
| class_name argument_list { $$ = Node\Attribute[$1, $2]; }
;
attribute_group:
attribute_decl { init($1); }
| attribute_group ',' attribute_decl { push($1, $3); }
;
attribute:
T_ATTRIBUTE attribute_group optional_comma ']' { $$ = Node\AttributeGroup[$2]; }
;
attributes:
attribute { init($1); }
| attributes attribute { push($1, $2); }
;
optional_attributes:
/* empty */ { $$ = []; }
| attributes { $$ = $1; }
;
top_statement:
statement { $$ = $1; }
| function_declaration_statement { $$ = $1; }
| class_declaration_statement { $$ = $1; }
| T_HALT_COMPILER
{ $$ = Stmt\HaltCompiler[$this->lexer->handleHaltCompiler()]; }
| T_NAMESPACE namespace_declaration_name semi
{ $$ = Stmt\Namespace_[$2, null];
$$->setAttribute('kind', Stmt\Namespace_::KIND_SEMICOLON);
$this->checkNamespace($$); }
| T_NAMESPACE namespace_declaration_name '{' top_statement_list '}'
{ $$ = Stmt\Namespace_[$2, $4];
$$->setAttribute('kind', Stmt\Namespace_::KIND_BRACED);
$this->checkNamespace($$); }
| T_NAMESPACE '{' top_statement_list '}'
{ $$ = Stmt\Namespace_[null, $3];
$$->setAttribute('kind', Stmt\Namespace_::KIND_BRACED);
$this->checkNamespace($$); }
| T_USE use_declarations semi { $$ = Stmt\Use_[$2, Stmt\Use_::TYPE_NORMAL]; }
| T_USE use_type use_declarations semi { $$ = Stmt\Use_[$3, $2]; }
| group_use_declaration semi { $$ = $1; }
| T_CONST constant_declaration_list semi { $$ = Stmt\Const_[$2]; }
;
use_type:
T_FUNCTION { $$ = Stmt\Use_::TYPE_FUNCTION; }
| T_CONST { $$ = Stmt\Use_::TYPE_CONSTANT; }
;
group_use_declaration:
T_USE use_type legacy_namespace_name T_NS_SEPARATOR '{' unprefixed_use_declarations '}'
{ $$ = Stmt\GroupUse[$3, $6, $2]; }
| T_USE legacy_namespace_name T_NS_SEPARATOR '{' inline_use_declarations '}'
{ $$ = Stmt\GroupUse[$2, $5, Stmt\Use_::TYPE_UNKNOWN]; }
;
unprefixed_use_declarations:
non_empty_unprefixed_use_declarations optional_comma { $$ = $1; }
;
non_empty_unprefixed_use_declarations:
non_empty_unprefixed_use_declarations ',' unprefixed_use_declaration
{ push($1, $3); }
| unprefixed_use_declaration { init($1); }
;
use_declarations:
non_empty_use_declarations no_comma { $$ = $1; }
;
non_empty_use_declarations:
non_empty_use_declarations ',' use_declaration { push($1, $3); }
| use_declaration { init($1); }
;
inline_use_declarations:
non_empty_inline_use_declarations optional_comma { $$ = $1; }
;
non_empty_inline_use_declarations:
non_empty_inline_use_declarations ',' inline_use_declaration
{ push($1, $3); }
| inline_use_declaration { init($1); }
;
unprefixed_use_declaration:
namespace_name
{ $$ = Stmt\UseUse[$1, null, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #1); }
| namespace_name T_AS identifier
{ $$ = Stmt\UseUse[$1, $3, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #3); }
;
use_declaration:
legacy_namespace_name
{ $$ = Stmt\UseUse[$1, null, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #1); }
| legacy_namespace_name T_AS identifier
{ $$ = Stmt\UseUse[$1, $3, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #3); }
;
inline_use_declaration:
unprefixed_use_declaration { $$ = $1; $$->type = Stmt\Use_::TYPE_NORMAL; }
| use_type unprefixed_use_declaration { $$ = $2; $$->type = $1; }
;
constant_declaration_list:
non_empty_constant_declaration_list no_comma { $$ = $1; }
;
non_empty_constant_declaration_list:
non_empty_constant_declaration_list ',' constant_declaration
{ push($1, $3); }
| constant_declaration { init($1); }
;
constant_declaration:
identifier '=' expr { $$ = Node\Const_[$1, $3]; }
;
class_const_list:
non_empty_class_const_list no_comma { $$ = $1; }
;
non_empty_class_const_list:
non_empty_class_const_list ',' class_const { push($1, $3); }
| class_const { init($1); }
;
class_const:
identifier_ex '=' expr { $$ = Node\Const_[$1, $3]; }
;
inner_statement_list_ex:
inner_statement_list_ex inner_statement { pushNormalizing($1, $2); }
| /* empty */ { init(); }
;
inner_statement_list:
inner_statement_list_ex
{ makeZeroLengthNop($nop, $this->lookaheadStartAttributes);
if ($nop !== null) { $1[] = $nop; } $$ = $1; }
;
inner_statement:
statement { $$ = $1; }
| function_declaration_statement { $$ = $1; }
| class_declaration_statement { $$ = $1; }
| T_HALT_COMPILER
{ throw new Error('__HALT_COMPILER() can only be used from the outermost scope', attributes()); }
;
non_empty_statement:
'{' inner_statement_list '}'
{
if ($2) {
$$ = $2; prependLeadingComments($$);
} else {
makeNop($$, $this->startAttributeStack[#1], $this->endAttributes);
if (null === $$) { $$ = array(); }
}
}
| T_IF '(' expr ')' statement elseif_list else_single
{ $$ = Stmt\If_[$3, ['stmts' => toArray($5), 'elseifs' => $6, 'else' => $7]]; }
| T_IF '(' expr ')' ':' inner_statement_list new_elseif_list new_else_single T_ENDIF ';'
{ $$ = Stmt\If_[$3, ['stmts' => $6, 'elseifs' => $7, 'else' => $8]]; }
| T_WHILE '(' expr ')' while_statement { $$ = Stmt\While_[$3, $5]; }
| T_DO statement T_WHILE '(' expr ')' ';' { $$ = Stmt\Do_ [$5, toArray($2)]; }
| T_FOR '(' for_expr ';' for_expr ';' for_expr ')' for_statement
{ $$ = Stmt\For_[['init' => $3, 'cond' => $5, 'loop' => $7, 'stmts' => $9]]; }
| T_SWITCH '(' expr ')' switch_case_list { $$ = Stmt\Switch_[$3, $5]; }
| T_BREAK optional_expr semi { $$ = Stmt\Break_[$2]; }
| T_CONTINUE optional_expr semi { $$ = Stmt\Continue_[$2]; }
| T_RETURN optional_expr semi { $$ = Stmt\Return_[$2]; }
| T_GLOBAL global_var_list semi { $$ = Stmt\Global_[$2]; }
| T_STATIC static_var_list semi { $$ = Stmt\Static_[$2]; }
| T_ECHO expr_list_forbid_comma semi { $$ = Stmt\Echo_[$2]; }
| T_INLINE_HTML { $$ = Stmt\InlineHTML[$1]; }
| expr semi {
$e = $1;
if ($e instanceof Expr\Throw_) {
// For backwards-compatibility reasons, convert throw in statement position into
// Stmt\Throw_ rather than Stmt\Expression(Expr\Throw_).
$$ = Stmt\Throw_[$e->expr];
} else {
$$ = Stmt\Expression[$e];
}
}
| T_UNSET '(' variables_list ')' semi { $$ = Stmt\Unset_[$3]; }
| T_FOREACH '(' expr T_AS foreach_variable ')' foreach_statement
{ $$ = Stmt\Foreach_[$3, $5[0], ['keyVar' => null, 'byRef' => $5[1], 'stmts' => $7]]; }
| T_FOREACH '(' expr T_AS variable T_DOUBLE_ARROW foreach_variable ')' foreach_statement
{ $$ = Stmt\Foreach_[$3, $7[0], ['keyVar' => $5, 'byRef' => $7[1], 'stmts' => $9]]; }
| T_FOREACH '(' expr error ')' foreach_statement
{ $$ = Stmt\Foreach_[$3, new Expr\Error(stackAttributes(#4)), ['stmts' => $6]]; }
| T_DECLARE '(' declare_list ')' declare_statement { $$ = Stmt\Declare_[$3, $5]; }
| T_TRY '{' inner_statement_list '}' catches optional_finally
{ $$ = Stmt\TryCatch[$3, $5, $6]; $this->checkTryCatch($$); }
| T_GOTO identifier semi { $$ = Stmt\Goto_[$2]; }
| identifier ':' { $$ = Stmt\Label[$1]; }
| error { $$ = array(); /* means: no statement */ }
;
statement:
non_empty_statement { $$ = $1; }
| ';'
{ makeNop($$, $this->startAttributeStack[#1], $this->endAttributes);
if ($$ === null) $$ = array(); /* means: no statement */ }
;
catches:
/* empty */ { init(); }
| catches catch { push($1, $2); }
;
name_union:
name { init($1); }
| name_union '|' name { push($1, $3); }
;
catch:
T_CATCH '(' name_union optional_plain_variable ')' '{' inner_statement_list '}'
{ $$ = Stmt\Catch_[$3, $4, $7]; }
;
optional_finally:
/* empty */ { $$ = null; }
| T_FINALLY '{' inner_statement_list '}' { $$ = Stmt\Finally_[$3]; }
;
variables_list:
non_empty_variables_list optional_comma { $$ = $1; }
;
non_empty_variables_list:
variable { init($1); }
| non_empty_variables_list ',' variable { push($1, $3); }
;
optional_ref:
/* empty */ { $$ = false; }
| '&' { $$ = true; }
;
optional_ellipsis:
/* empty */ { $$ = false; }
| T_ELLIPSIS { $$ = true; }
;
block_or_error:
'{' inner_statement_list '}' { $$ = $2; }
| error { $$ = []; }
;
function_declaration_statement:
T_FUNCTION optional_ref identifier '(' parameter_list ')' optional_return_type block_or_error
{ $$ = Stmt\Function_[$3, ['byRef' => $2, 'params' => $5, 'returnType' => $7, 'stmts' => $8, 'attrGroups' => []]]; }
| attributes T_FUNCTION optional_ref identifier '(' parameter_list ')' optional_return_type block_or_error
{ $$ = Stmt\Function_[$4, ['byRef' => $3, 'params' => $6, 'returnType' => $8, 'stmts' => $9, 'attrGroups' => $1]]; }
;
class_declaration_statement:
optional_attributes class_entry_type identifier extends_from implements_list '{' class_statement_list '}'
{ $$ = Stmt\Class_[$3, ['type' => $2, 'extends' => $4, 'implements' => $5, 'stmts' => $7, 'attrGroups' => $1]];
$this->checkClass($$, #3); }
| optional_attributes T_INTERFACE identifier interface_extends_list '{' class_statement_list '}'
{ $$ = Stmt\Interface_[$3, ['extends' => $4, 'stmts' => $6, 'attrGroups' => $1]];
$this->checkInterface($$, #3); }
| optional_attributes T_TRAIT identifier '{' class_statement_list '}'
{ $$ = Stmt\Trait_[$3, ['stmts' => $5, 'attrGroups' => $1]]; }
;
class_entry_type:
T_CLASS { $$ = 0; }
| T_ABSTRACT T_CLASS { $$ = Stmt\Class_::MODIFIER_ABSTRACT; }
| T_FINAL T_CLASS { $$ = Stmt\Class_::MODIFIER_FINAL; }
;
extends_from:
/* empty */ { $$ = null; }
| T_EXTENDS class_name { $$ = $2; }
;
interface_extends_list:
/* empty */ { $$ = array(); }
| T_EXTENDS class_name_list { $$ = $2; }
;
implements_list:
/* empty */ { $$ = array(); }
| T_IMPLEMENTS class_name_list { $$ = $2; }
;
class_name_list:
non_empty_class_name_list no_comma { $$ = $1; }
;
non_empty_class_name_list:
class_name { init($1); }
| non_empty_class_name_list ',' class_name { push($1, $3); }
;
for_statement:
statement { $$ = toArray($1); }
| ':' inner_statement_list T_ENDFOR ';' { $$ = $2; }
;
foreach_statement:
statement { $$ = toArray($1); }
| ':' inner_statement_list T_ENDFOREACH ';' { $$ = $2; }
;
declare_statement:
non_empty_statement { $$ = toArray($1); }
| ';' { $$ = null; }
| ':' inner_statement_list T_ENDDECLARE ';' { $$ = $2; }
;
declare_list:
non_empty_declare_list no_comma { $$ = $1; }
;
non_empty_declare_list:
declare_list_element { init($1); }
| non_empty_declare_list ',' declare_list_element { push($1, $3); }
;
declare_list_element:
identifier '=' expr { $$ = Stmt\DeclareDeclare[$1, $3]; }
;
switch_case_list:
'{' case_list '}' { $$ = $2; }
| '{' ';' case_list '}' { $$ = $3; }
| ':' case_list T_ENDSWITCH ';' { $$ = $2; }
| ':' ';' case_list T_ENDSWITCH ';' { $$ = $3; }
;
case_list:
/* empty */ { init(); }
| case_list case { push($1, $2); }
;
case:
T_CASE expr case_separator inner_statement_list_ex { $$ = Stmt\Case_[$2, $4]; }
| T_DEFAULT case_separator inner_statement_list_ex { $$ = Stmt\Case_[null, $3]; }
;
case_separator:
':'
| ';'
;
match:
T_MATCH '(' expr ')' '{' match_arm_list '}' { $$ = Expr\Match_[$3, $6]; }
;
match_arm_list:
/* empty */ { $$ = []; }
| non_empty_match_arm_list optional_comma { $$ = $1; }
;
non_empty_match_arm_list:
match_arm { init($1); }
| non_empty_match_arm_list ',' match_arm { push($1, $3); }
;
match_arm:
expr_list_allow_comma T_DOUBLE_ARROW expr { $$ = Node\MatchArm[$1, $3]; }
| T_DEFAULT optional_comma T_DOUBLE_ARROW expr { $$ = Node\MatchArm[null, $4]; }
;
while_statement:
statement { $$ = toArray($1); }
| ':' inner_statement_list T_ENDWHILE ';' { $$ = $2; }
;
elseif_list:
/* empty */ { init(); }
| elseif_list elseif { push($1, $2); }
;
elseif:
T_ELSEIF '(' expr ')' statement { $$ = Stmt\ElseIf_[$3, toArray($5)]; }
;
new_elseif_list:
/* empty */ { init(); }
| new_elseif_list new_elseif { push($1, $2); }
;
new_elseif:
T_ELSEIF '(' expr ')' ':' inner_statement_list { $$ = Stmt\ElseIf_[$3, $6]; }
;
else_single:
/* empty */ { $$ = null; }
| T_ELSE statement { $$ = Stmt\Else_[toArray($2)]; }
;
new_else_single:
/* empty */ { $$ = null; }
| T_ELSE ':' inner_statement_list { $$ = Stmt\Else_[$3]; }
;
foreach_variable:
variable { $$ = array($1, false); }
| '&' variable { $$ = array($2, true); }
| list_expr { $$ = array($1, false); }
| array_short_syntax { $$ = array($1, false); }
;
parameter_list:
non_empty_parameter_list optional_comma { $$ = $1; }
| /* empty */ { $$ = array(); }
;
non_empty_parameter_list:
parameter { init($1); }
| non_empty_parameter_list ',' parameter { push($1, $3); }
;
optional_visibility_modifier:
/* empty */ { $$ = 0; }
| T_PUBLIC { $$ = Stmt\Class_::MODIFIER_PUBLIC; }
| T_PROTECTED { $$ = Stmt\Class_::MODIFIER_PROTECTED; }
| T_PRIVATE { $$ = Stmt\Class_::MODIFIER_PRIVATE; }
;
parameter:
optional_attributes optional_visibility_modifier optional_type_without_static optional_ref optional_ellipsis plain_variable
{ $$ = new Node\Param($6, null, $3, $4, $5, attributes(), $2, $1);
$this->checkParam($$); }
| optional_attributes optional_visibility_modifier optional_type_without_static optional_ref optional_ellipsis plain_variable '=' expr
{ $$ = new Node\Param($6, $8, $3, $4, $5, attributes(), $2, $1);
$this->checkParam($$); }
| optional_attributes optional_visibility_modifier optional_type_without_static optional_ref optional_ellipsis error
{ $$ = new Node\Param(Expr\Error[], null, $3, $4, $5, attributes(), $2, $1); }
;
type_expr:
type { $$ = $1; }
| '?' type { $$ = Node\NullableType[$2]; }
| union_type { $$ = Node\UnionType[$1]; }
;
type:
type_without_static { $$ = $1; }
| T_STATIC { $$ = Node\Name['static']; }
;
type_without_static:
name { $$ = $this->handleBuiltinTypes($1); }
| T_ARRAY { $$ = Node\Identifier['array']; }
| T_CALLABLE { $$ = Node\Identifier['callable']; }
;
union_type:
type '|' type { init($1, $3); }
| union_type '|' type { push($1, $3); }
;
union_type_without_static:
type_without_static '|' type_without_static { init($1, $3); }
| union_type_without_static '|' type_without_static { push($1, $3); }
;
type_expr_without_static:
type_without_static { $$ = $1; }
| '?' type_without_static { $$ = Node\NullableType[$2]; }
| union_type_without_static { $$ = Node\UnionType[$1]; }
;
optional_type_without_static:
/* empty */ { $$ = null; }
| type_expr_without_static { $$ = $1; }
;
optional_return_type:
/* empty */ { $$ = null; }
| ':' type_expr { $$ = $2; }
| ':' error { $$ = null; }
;
argument_list:
'(' ')' { $$ = array(); }
| '(' non_empty_argument_list optional_comma ')' { $$ = $2; }
;
non_empty_argument_list:
argument { init($1); }
| non_empty_argument_list ',' argument { push($1, $3); }
;
argument:
expr { $$ = Node\Arg[$1, false, false]; }
| '&' variable { $$ = Node\Arg[$2, true, false]; }
| T_ELLIPSIS expr { $$ = Node\Arg[$2, false, true]; }
| identifier_ex ':' expr
{ $$ = new Node\Arg($3, false, false, attributes(), $1); }
;
global_var_list:
non_empty_global_var_list no_comma { $$ = $1; }
;
non_empty_global_var_list:
non_empty_global_var_list ',' global_var { push($1, $3); }
| global_var { init($1); }
;
global_var:
simple_variable { $$ = $1; }
;
static_var_list:
non_empty_static_var_list no_comma { $$ = $1; }
;
non_empty_static_var_list:
non_empty_static_var_list ',' static_var { push($1, $3); }
| static_var { init($1); }
;
static_var:
plain_variable { $$ = Stmt\StaticVar[$1, null]; }
| plain_variable '=' expr { $$ = Stmt\StaticVar[$1, $3]; }
;
class_statement_list_ex:
class_statement_list_ex class_statement { if ($2 !== null) { push($1, $2); } }
| /* empty */ { init(); }
;
class_statement_list:
class_statement_list_ex
{ makeZeroLengthNop($nop, $this->lookaheadStartAttributes);
if ($nop !== null) { $1[] = $nop; } $$ = $1; }
;
class_statement:
optional_attributes variable_modifiers optional_type_without_static property_declaration_list semi
{ $$ = new Stmt\Property($2, $4, attributes(), $3, $1);
$this->checkProperty($$, #2); }
| optional_attributes method_modifiers T_CONST class_const_list semi
{ $$ = new Stmt\ClassConst($4, $2, attributes(), $1);
$this->checkClassConst($$, #2); }
| optional_attributes method_modifiers T_FUNCTION optional_ref identifier_ex '(' parameter_list ')' optional_return_type method_body
{ $$ = Stmt\ClassMethod[$5, ['type' => $2, 'byRef' => $4, 'params' => $7, 'returnType' => $9, 'stmts' => $10, 'attrGroups' => $1]];
$this->checkClassMethod($$, #2); }
| T_USE class_name_list trait_adaptations { $$ = Stmt\TraitUse[$2, $3]; }
| error { $$ = null; /* will be skipped */ }
;
trait_adaptations:
';' { $$ = array(); }
| '{' trait_adaptation_list '}' { $$ = $2; }
;
trait_adaptation_list:
/* empty */ { init(); }
| trait_adaptation_list trait_adaptation { push($1, $2); }
;
trait_adaptation:
trait_method_reference_fully_qualified T_INSTEADOF class_name_list ';'
{ $$ = Stmt\TraitUseAdaptation\Precedence[$1[0], $1[1], $3]; }
| trait_method_reference T_AS member_modifier identifier_ex ';'
{ $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], $3, $4]; }
| trait_method_reference T_AS member_modifier ';'
{ $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], $3, null]; }
| trait_method_reference T_AS identifier ';'
{ $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], null, $3]; }
| trait_method_reference T_AS reserved_non_modifiers_identifier ';'
{ $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], null, $3]; }
;
trait_method_reference_fully_qualified:
name T_PAAMAYIM_NEKUDOTAYIM identifier_ex { $$ = array($1, $3); }
;
trait_method_reference:
trait_method_reference_fully_qualified { $$ = $1; }
| identifier_ex { $$ = array(null, $1); }
;
method_body:
';' /* abstract method */ { $$ = null; }
| block_or_error { $$ = $1; }
;
variable_modifiers:
non_empty_member_modifiers { $$ = $1; }
| T_VAR { $$ = 0; }
;
method_modifiers:
/* empty */ { $$ = 0; }
| non_empty_member_modifiers { $$ = $1; }
;
non_empty_member_modifiers:
member_modifier { $$ = $1; }
| non_empty_member_modifiers member_modifier { $this->checkModifier($1, $2, #2); $$ = $1 | $2; }
;
member_modifier:
T_PUBLIC { $$ = Stmt\Class_::MODIFIER_PUBLIC; }
| T_PROTECTED { $$ = Stmt\Class_::MODIFIER_PROTECTED; }
| T_PRIVATE { $$ = Stmt\Class_::MODIFIER_PRIVATE; }
| T_STATIC { $$ = Stmt\Class_::MODIFIER_STATIC; }
| T_ABSTRACT { $$ = Stmt\Class_::MODIFIER_ABSTRACT; }
| T_FINAL { $$ = Stmt\Class_::MODIFIER_FINAL; }
;
property_declaration_list:
non_empty_property_declaration_list no_comma { $$ = $1; }
;
non_empty_property_declaration_list:
property_declaration { init($1); }
| non_empty_property_declaration_list ',' property_declaration
{ push($1, $3); }
;
property_decl_name:
T_VARIABLE { $$ = Node\VarLikeIdentifier[parseVar($1)]; }
;
property_declaration:
property_decl_name { $$ = Stmt\PropertyProperty[$1, null]; }
| property_decl_name '=' expr { $$ = Stmt\PropertyProperty[$1, $3]; }
;
expr_list_forbid_comma:
non_empty_expr_list no_comma { $$ = $1; }
;
expr_list_allow_comma:
non_empty_expr_list optional_comma { $$ = $1; }
;
non_empty_expr_list:
non_empty_expr_list ',' expr { push($1, $3); }
| expr { init($1); }
;
for_expr:
/* empty */ { $$ = array(); }
| expr_list_forbid_comma { $$ = $1; }
;
expr:
variable { $$ = $1; }
| list_expr '=' expr { $$ = Expr\Assign[$1, $3]; }
| array_short_syntax '=' expr { $$ = Expr\Assign[$1, $3]; }
| variable '=' expr { $$ = Expr\Assign[$1, $3]; }
| variable '=' '&' variable { $$ = Expr\AssignRef[$1, $4]; }
| new_expr { $$ = $1; }
| match { $$ = $1; }
| T_CLONE expr { $$ = Expr\Clone_[$2]; }
| variable T_PLUS_EQUAL expr { $$ = Expr\AssignOp\Plus [$1, $3]; }
| variable T_MINUS_EQUAL expr { $$ = Expr\AssignOp\Minus [$1, $3]; }
| variable T_MUL_EQUAL expr { $$ = Expr\AssignOp\Mul [$1, $3]; }
| variable T_DIV_EQUAL expr { $$ = Expr\AssignOp\Div [$1, $3]; }
| variable T_CONCAT_EQUAL expr { $$ = Expr\AssignOp\Concat [$1, $3]; }
| variable T_MOD_EQUAL expr { $$ = Expr\AssignOp\Mod [$1, $3]; }
| variable T_AND_EQUAL expr { $$ = Expr\AssignOp\BitwiseAnd[$1, $3]; }
| variable T_OR_EQUAL expr { $$ = Expr\AssignOp\BitwiseOr [$1, $3]; }
| variable T_XOR_EQUAL expr { $$ = Expr\AssignOp\BitwiseXor[$1, $3]; }
| variable T_SL_EQUAL expr { $$ = Expr\AssignOp\ShiftLeft [$1, $3]; }
| variable T_SR_EQUAL expr { $$ = Expr\AssignOp\ShiftRight[$1, $3]; }
| variable T_POW_EQUAL expr { $$ = Expr\AssignOp\Pow [$1, $3]; }
| variable T_COALESCE_EQUAL expr { $$ = Expr\AssignOp\Coalesce [$1, $3]; }
| variable T_INC { $$ = Expr\PostInc[$1]; }
| T_INC variable { $$ = Expr\PreInc [$2]; }
| variable T_DEC { $$ = Expr\PostDec[$1]; }
| T_DEC variable { $$ = Expr\PreDec [$2]; }
| expr T_BOOLEAN_OR expr { $$ = Expr\BinaryOp\BooleanOr [$1, $3]; }
| expr T_BOOLEAN_AND expr { $$ = Expr\BinaryOp\BooleanAnd[$1, $3]; }
| expr T_LOGICAL_OR expr { $$ = Expr\BinaryOp\LogicalOr [$1, $3]; }
| expr T_LOGICAL_AND expr { $$ = Expr\BinaryOp\LogicalAnd[$1, $3]; }
| expr T_LOGICAL_XOR expr { $$ = Expr\BinaryOp\LogicalXor[$1, $3]; }
| expr '|' expr { $$ = Expr\BinaryOp\BitwiseOr [$1, $3]; }
| expr '&' expr { $$ = Expr\BinaryOp\BitwiseAnd[$1, $3]; }
| expr '^' expr { $$ = Expr\BinaryOp\BitwiseXor[$1, $3]; }
| expr '.' expr { $$ = Expr\BinaryOp\Concat [$1, $3]; }
| expr '+' expr { $$ = Expr\BinaryOp\Plus [$1, $3]; }
| expr '-' expr { $$ = Expr\BinaryOp\Minus [$1, $3]; }
| expr '*' expr { $$ = Expr\BinaryOp\Mul [$1, $3]; }
| expr '/' expr { $$ = Expr\BinaryOp\Div [$1, $3]; }
| expr '%' expr { $$ = Expr\BinaryOp\Mod [$1, $3]; }
| expr T_SL expr { $$ = Expr\BinaryOp\ShiftLeft [$1, $3]; }
| expr T_SR expr { $$ = Expr\BinaryOp\ShiftRight[$1, $3]; }
| expr T_POW expr { $$ = Expr\BinaryOp\Pow [$1, $3]; }
| '+' expr %prec T_INC { $$ = Expr\UnaryPlus [$2]; }
| '-' expr %prec T_INC { $$ = Expr\UnaryMinus[$2]; }
| '!' expr { $$ = Expr\BooleanNot[$2]; }
| '~' expr { $$ = Expr\BitwiseNot[$2]; }
| expr T_IS_IDENTICAL expr { $$ = Expr\BinaryOp\Identical [$1, $3]; }
| expr T_IS_NOT_IDENTICAL expr { $$ = Expr\BinaryOp\NotIdentical [$1, $3]; }
| expr T_IS_EQUAL expr { $$ = Expr\BinaryOp\Equal [$1, $3]; }
| expr T_IS_NOT_EQUAL expr { $$ = Expr\BinaryOp\NotEqual [$1, $3]; }
| expr T_SPACESHIP expr { $$ = Expr\BinaryOp\Spaceship [$1, $3]; }
| expr '<' expr { $$ = Expr\BinaryOp\Smaller [$1, $3]; }
| expr T_IS_SMALLER_OR_EQUAL expr { $$ = Expr\BinaryOp\SmallerOrEqual[$1, $3]; }
| expr '>' expr { $$ = Expr\BinaryOp\Greater [$1, $3]; }
| expr T_IS_GREATER_OR_EQUAL expr { $$ = Expr\BinaryOp\GreaterOrEqual[$1, $3]; }
| expr T_INSTANCEOF class_name_reference { $$ = Expr\Instanceof_[$1, $3]; }
| '(' expr ')' { $$ = $2; }
| expr '?' expr ':' expr { $$ = Expr\Ternary[$1, $3, $5]; }
| expr '?' ':' expr { $$ = Expr\Ternary[$1, null, $4]; }
| expr T_COALESCE expr { $$ = Expr\BinaryOp\Coalesce[$1, $3]; }
| T_ISSET '(' expr_list_allow_comma ')' { $$ = Expr\Isset_[$3]; }
| T_EMPTY '(' expr ')' { $$ = Expr\Empty_[$3]; }
| T_INCLUDE expr { $$ = Expr\Include_[$2, Expr\Include_::TYPE_INCLUDE]; }
| T_INCLUDE_ONCE expr { $$ = Expr\Include_[$2, Expr\Include_::TYPE_INCLUDE_ONCE]; }
| T_EVAL '(' expr ')' { $$ = Expr\Eval_[$3]; }
| T_REQUIRE expr { $$ = Expr\Include_[$2, Expr\Include_::TYPE_REQUIRE]; }
| T_REQUIRE_ONCE expr { $$ = Expr\Include_[$2, Expr\Include_::TYPE_REQUIRE_ONCE]; }
| T_INT_CAST expr { $$ = Expr\Cast\Int_ [$2]; }
| T_DOUBLE_CAST expr
{ $attrs = attributes();
$attrs['kind'] = $this->getFloatCastKind($1);
$$ = new Expr\Cast\Double($2, $attrs); }
| T_STRING_CAST expr { $$ = Expr\Cast\String_ [$2]; }
| T_ARRAY_CAST expr { $$ = Expr\Cast\Array_ [$2]; }
| T_OBJECT_CAST expr { $$ = Expr\Cast\Object_ [$2]; }
| T_BOOL_CAST expr { $$ = Expr\Cast\Bool_ [$2]; }
| T_UNSET_CAST expr { $$ = Expr\Cast\Unset_ [$2]; }
| T_EXIT exit_expr
{ $attrs = attributes();
$attrs['kind'] = strtolower($1) === 'exit' ? Expr\Exit_::KIND_EXIT : Expr\Exit_::KIND_DIE;
$$ = new Expr\Exit_($2, $attrs); }
| '@' expr { $$ = Expr\ErrorSuppress[$2]; }
| scalar { $$ = $1; }
| '`' backticks_expr '`' { $$ = Expr\ShellExec[$2]; }
| T_PRINT expr { $$ = Expr\Print_[$2]; }
| T_YIELD { $$ = Expr\Yield_[null, null]; }
| T_YIELD expr { $$ = Expr\Yield_[$2, null]; }
| T_YIELD expr T_DOUBLE_ARROW expr { $$ = Expr\Yield_[$4, $2]; }
| T_YIELD_FROM expr { $$ = Expr\YieldFrom[$2]; }
| T_THROW expr { $$ = Expr\Throw_[$2]; }
| T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr
{ $$ = Expr\ArrowFunction[['static' => false, 'byRef' => $2, 'params' => $4, 'returnType' => $6, 'expr' => $8, 'attrGroups' => []]]; }
| T_STATIC T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr
{ $$ = Expr\ArrowFunction[['static' => true, 'byRef' => $3, 'params' => $5, 'returnType' => $7, 'expr' => $9, 'attrGroups' => []]]; }
| T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type block_or_error
{ $$ = Expr\Closure[['static' => false, 'byRef' => $2, 'params' => $4, 'uses' => $6, 'returnType' => $7, 'stmts' => $8, 'attrGroups' => []]]; }
| T_STATIC T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type block_or_error
{ $$ = Expr\Closure[['static' => true, 'byRef' => $3, 'params' => $5, 'uses' => $7, 'returnType' => $8, 'stmts' => $9, 'attrGroups' => []]]; }
| attributes T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr
{ $$ = Expr\ArrowFunction[['static' => false, 'byRef' => $3, 'params' => $5, 'returnType' => $7, 'expr' => $9, 'attrGroups' => $1]]; }
| attributes T_STATIC T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr
{ $$ = Expr\ArrowFunction[['static' => true, 'byRef' => $4, 'params' => $6, 'returnType' => $8, 'expr' => $10, 'attrGroups' => $1]]; }
| attributes T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type block_or_error
{ $$ = Expr\Closure[['static' => false, 'byRef' => $3, 'params' => $5, 'uses' => $7, 'returnType' => $8, 'stmts' => $9, 'attrGroups' => $1]]; }
| attributes T_STATIC T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type block_or_error
{ $$ = Expr\Closure[['static' => true, 'byRef' => $4, 'params' => $6, 'uses' => $8, 'returnType' => $9, 'stmts' => $10, 'attrGroups' => $1]]; }
;
anonymous_class:
optional_attributes T_CLASS ctor_arguments extends_from implements_list '{' class_statement_list '}'
{ $$ = array(Stmt\Class_[null, ['type' => 0, 'extends' => $4, 'implements' => $5, 'stmts' => $7, 'attrGroups' => $1]], $3);
$this->checkClass($$[0], -1); }
;
new_expr:
T_NEW class_name_reference ctor_arguments { $$ = Expr\New_[$2, $3]; }
| T_NEW anonymous_class
{ list($class, $ctorArgs) = $2; $$ = Expr\New_[$class, $ctorArgs]; }
;
lexical_vars:
/* empty */ { $$ = array(); }
| T_USE '(' lexical_var_list ')' { $$ = $3; }
;
lexical_var_list:
non_empty_lexical_var_list optional_comma { $$ = $1; }
;
non_empty_lexical_var_list:
lexical_var { init($1); }
| non_empty_lexical_var_list ',' lexical_var { push($1, $3); }
;
lexical_var:
optional_ref plain_variable { $$ = Expr\ClosureUse[$2, $1]; }
;
function_call:
name argument_list { $$ = Expr\FuncCall[$1, $2]; }
| callable_expr argument_list { $$ = Expr\FuncCall[$1, $2]; }
| class_name_or_var T_PAAMAYIM_NEKUDOTAYIM member_name argument_list
{ $$ = Expr\StaticCall[$1, $3, $4]; }
;
class_name:
T_STATIC { $$ = Name[$1]; }
| name { $$ = $1; }
;
name:
T_STRING { $$ = Name[$1]; }
| T_NAME_QUALIFIED { $$ = Name[$1]; }
| T_NAME_FULLY_QUALIFIED { $$ = Name\FullyQualified[substr($1, 1)]; }
| T_NAME_RELATIVE { $$ = Name\Relative[substr($1, 10)]; }
;
class_name_reference:
class_name { $$ = $1; }
| new_variable { $$ = $1; }
| '(' expr ')' { $$ = $2; }
| error { $$ = Expr\Error[]; $this->errorState = 2; }
;
class_name_or_var:
class_name { $$ = $1; }
| fully_dereferencable { $$ = $1; }
;
exit_expr:
/* empty */ { $$ = null; }
| '(' optional_expr ')' { $$ = $2; }
;
backticks_expr:
/* empty */ { $$ = array(); }
| T_ENCAPSED_AND_WHITESPACE
{ $$ = array(Scalar\EncapsedStringPart[Scalar\String_::parseEscapeSequences($1, '`')]); }
| encaps_list { parseEncapsed($1, '`', true); $$ = $1; }
;
ctor_arguments:
/* empty */ { $$ = array(); }
| argument_list { $$ = $1; }
;
constant:
name { $$ = Expr\ConstFetch[$1]; }
| T_LINE { $$ = Scalar\MagicConst\Line[]; }
| T_FILE { $$ = Scalar\MagicConst\File[]; }
| T_DIR { $$ = Scalar\MagicConst\Dir[]; }
| T_CLASS_C { $$ = Scalar\MagicConst\Class_[]; }
| T_TRAIT_C { $$ = Scalar\MagicConst\Trait_[]; }
| T_METHOD_C { $$ = Scalar\MagicConst\Method[]; }
| T_FUNC_C { $$ = Scalar\MagicConst\Function_[]; }
| T_NS_C { $$ = Scalar\MagicConst\Namespace_[]; }
;
class_constant:
class_name_or_var T_PAAMAYIM_NEKUDOTAYIM identifier_ex
{ $$ = Expr\ClassConstFetch[$1, $3]; }
/* We interpret an isolated FOO:: as an unfinished class constant fetch. It could also be
an unfinished static property fetch or unfinished scoped call. */
| class_name_or_var T_PAAMAYIM_NEKUDOTAYIM error
{ $$ = Expr\ClassConstFetch[$1, new Expr\Error(stackAttributes(#3))]; $this->errorState = 2; }
;
array_short_syntax:
'[' array_pair_list ']'
{ $attrs = attributes(); $attrs['kind'] = Expr\Array_::KIND_SHORT;
$$ = new Expr\Array_($2, $attrs); }
;
dereferencable_scalar:
T_ARRAY '(' array_pair_list ')'
{ $attrs = attributes(); $attrs['kind'] = Expr\Array_::KIND_LONG;
$$ = new Expr\Array_($3, $attrs); }
| array_short_syntax { $$ = $1; }
| T_CONSTANT_ENCAPSED_STRING
{ $attrs = attributes(); $attrs['kind'] = strKind($1);
$$ = new Scalar\String_(Scalar\String_::parse($1), $attrs); }
| '"' encaps_list '"'
{ $attrs = attributes(); $attrs['kind'] = Scalar\String_::KIND_DOUBLE_QUOTED;
parseEncapsed($2, '"', true); $$ = new Scalar\Encapsed($2, $attrs); }
;
scalar:
T_LNUMBER { $$ = $this->parseLNumber($1, attributes()); }
| T_DNUMBER { $$ = Scalar\DNumber[Scalar\DNumber::parse($1)]; }
| dereferencable_scalar { $$ = $1; }
| constant { $$ = $1; }
| class_constant { $$ = $1; }
| T_START_HEREDOC T_ENCAPSED_AND_WHITESPACE T_END_HEREDOC
{ $$ = $this->parseDocString($1, $2, $3, attributes(), stackAttributes(#3), true); }
| T_START_HEREDOC T_END_HEREDOC
{ $$ = $this->parseDocString($1, '', $2, attributes(), stackAttributes(#2), true); }
| T_START_HEREDOC encaps_list T_END_HEREDOC
{ $$ = $this->parseDocString($1, $2, $3, attributes(), stackAttributes(#3), true); }
;
optional_expr:
/* empty */ { $$ = null; }
| expr { $$ = $1; }
;
fully_dereferencable:
variable { $$ = $1; }
| '(' expr ')' { $$ = $2; }
| dereferencable_scalar { $$ = $1; }
| class_constant { $$ = $1; }
;
array_object_dereferencable:
fully_dereferencable { $$ = $1; }
| constant { $$ = $1; }
;
callable_expr:
callable_variable { $$ = $1; }
| '(' expr ')' { $$ = $2; }
| dereferencable_scalar { $$ = $1; }
;
callable_variable:
simple_variable { $$ = $1; }
| array_object_dereferencable '[' optional_expr ']' { $$ = Expr\ArrayDimFetch[$1, $3]; }
| array_object_dereferencable '{' expr '}' { $$ = Expr\ArrayDimFetch[$1, $3]; }
| function_call { $$ = $1; }
| array_object_dereferencable T_OBJECT_OPERATOR property_name argument_list
{ $$ = Expr\MethodCall[$1, $3, $4]; }
| array_object_dereferencable T_NULLSAFE_OBJECT_OPERATOR property_name argument_list
{ $$ = Expr\NullsafeMethodCall[$1, $3, $4]; }
;
optional_plain_variable:
/* empty */ { $$ = null; }
| plain_variable { $$ = $1; }
;
variable:
callable_variable { $$ = $1; }
| static_member { $$ = $1; }
| array_object_dereferencable T_OBJECT_OPERATOR property_name
{ $$ = Expr\PropertyFetch[$1, $3]; }
| array_object_dereferencable T_NULLSAFE_OBJECT_OPERATOR property_name
{ $$ = Expr\NullsafePropertyFetch[$1, $3]; }
;
simple_variable:
plain_variable { $$ = $1; }
| '$' '{' expr '}' { $$ = Expr\Variable[$3]; }
| '$' simple_variable { $$ = Expr\Variable[$2]; }
| '$' error { $$ = Expr\Variable[Expr\Error[]]; $this->errorState = 2; }
;
static_member_prop_name:
simple_variable
{ $var = $1->name; $$ = \is_string($var) ? Node\VarLikeIdentifier[$var] : $var; }
;
static_member:
class_name_or_var T_PAAMAYIM_NEKUDOTAYIM static_member_prop_name
{ $$ = Expr\StaticPropertyFetch[$1, $3]; }
;
new_variable:
simple_variable { $$ = $1; }
| new_variable '[' optional_expr ']' { $$ = Expr\ArrayDimFetch[$1, $3]; }
| new_variable '{' expr '}' { $$ = Expr\ArrayDimFetch[$1, $3]; }
| new_variable T_OBJECT_OPERATOR property_name { $$ = Expr\PropertyFetch[$1, $3]; }
| new_variable T_NULLSAFE_OBJECT_OPERATOR property_name { $$ = Expr\NullsafePropertyFetch[$1, $3]; }
| class_name T_PAAMAYIM_NEKUDOTAYIM static_member_prop_name
{ $$ = Expr\StaticPropertyFetch[$1, $3]; }
| new_variable T_PAAMAYIM_NEKUDOTAYIM static_member_prop_name
{ $$ = Expr\StaticPropertyFetch[$1, $3]; }
;
member_name:
identifier_ex { $$ = $1; }
| '{' expr '}' { $$ = $2; }
| simple_variable { $$ = $1; }
;
property_name:
identifier { $$ = $1; }
| '{' expr '}' { $$ = $2; }
| simple_variable { $$ = $1; }
| error { $$ = Expr\Error[]; $this->errorState = 2; }
;
list_expr:
T_LIST '(' inner_array_pair_list ')' { $$ = Expr\List_[$3]; }
;
array_pair_list:
inner_array_pair_list
{ $$ = $1; $end = count($$)-1; if ($$[$end] === null) array_pop($$); }
;
comma_or_error:
','
| error
{ /* do nothing -- prevent default action of $$=$1. See #551. */ }
;
inner_array_pair_list:
inner_array_pair_list comma_or_error array_pair { push($1, $3); }
| array_pair { init($1); }
;
array_pair:
expr { $$ = Expr\ArrayItem[$1, null, false]; }
| '&' variable { $$ = Expr\ArrayItem[$2, null, true]; }
| list_expr { $$ = Expr\ArrayItem[$1, null, false]; }
| expr T_DOUBLE_ARROW expr { $$ = Expr\ArrayItem[$3, $1, false]; }
| expr T_DOUBLE_ARROW '&' variable { $$ = Expr\ArrayItem[$4, $1, true]; }
| expr T_DOUBLE_ARROW list_expr { $$ = Expr\ArrayItem[$3, $1, false]; }
| T_ELLIPSIS expr { $$ = Expr\ArrayItem[$2, null, false, attributes(), true]; }
| /* empty */ { $$ = null; }
;
encaps_list:
encaps_list encaps_var { push($1, $2); }
| encaps_list encaps_string_part { push($1, $2); }
| encaps_var { init($1); }
| encaps_string_part encaps_var { init($1, $2); }
;
encaps_string_part:
T_ENCAPSED_AND_WHITESPACE { $$ = Scalar\EncapsedStringPart[$1]; }
;
encaps_str_varname:
T_STRING_VARNAME { $$ = Expr\Variable[$1]; }
;
encaps_var:
plain_variable { $$ = $1; }
| plain_variable '[' encaps_var_offset ']' { $$ = Expr\ArrayDimFetch[$1, $3]; }
| plain_variable T_OBJECT_OPERATOR identifier { $$ = Expr\PropertyFetch[$1, $3]; }
| plain_variable T_NULLSAFE_OBJECT_OPERATOR identifier { $$ = Expr\NullsafePropertyFetch[$1, $3]; }
| T_DOLLAR_OPEN_CURLY_BRACES expr '}' { $$ = Expr\Variable[$2]; }
| T_DOLLAR_OPEN_CURLY_BRACES T_STRING_VARNAME '}' { $$ = Expr\Variable[$2]; }
| T_DOLLAR_OPEN_CURLY_BRACES encaps_str_varname '[' expr ']' '}'
{ $$ = Expr\ArrayDimFetch[$2, $4]; }
| T_CURLY_OPEN variable '}' { $$ = $2; }
;
encaps_var_offset:
T_STRING { $$ = Scalar\String_[$1]; }
| T_NUM_STRING { $$ = $this->parseNumString($1, attributes()); }
| '-' T_NUM_STRING { $$ = $this->parseNumString('-' . $2, attributes()); }
| plain_variable { $$ = $1; }
;
%%