%pure_parser %expect 2 %right T_THROW %left T_INCLUDE T_INCLUDE_ONCE T_EVAL T_REQUIRE T_REQUIRE_ONCE %left ',' %left T_LOGICAL_OR %left T_LOGICAL_XOR %left T_LOGICAL_AND %right T_PRINT %right T_YIELD %right T_DOUBLE_ARROW %right T_YIELD_FROM %left '=' T_PLUS_EQUAL T_MINUS_EQUAL T_MUL_EQUAL T_DIV_EQUAL T_CONCAT_EQUAL T_MOD_EQUAL T_AND_EQUAL T_OR_EQUAL T_XOR_EQUAL T_SL_EQUAL T_SR_EQUAL T_POW_EQUAL T_COALESCE_EQUAL %left '?' ':' %right T_COALESCE %left T_BOOLEAN_OR %left T_BOOLEAN_AND %left '|' %left '^' %left T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG %nonassoc T_IS_EQUAL T_IS_NOT_EQUAL T_IS_IDENTICAL T_IS_NOT_IDENTICAL T_SPACESHIP %nonassoc '<' T_IS_SMALLER_OR_EQUAL '>' T_IS_GREATER_OR_EQUAL #if PHP7 %left T_SL T_SR %left '+' '-' '.' #endif #if PHP8 %left '.' %left T_SL T_SR %left '+' '-' #endif %left '*' '/' '%' %right '!' %nonassoc T_INSTANCEOF %right '~' T_INC T_DEC T_INT_CAST T_DOUBLE_CAST T_STRING_CAST T_ARRAY_CAST T_OBJECT_CAST T_BOOL_CAST T_UNSET_CAST '@' %right T_POW %right '[' %nonassoc T_NEW T_CLONE %token T_EXIT %token T_IF %left T_ELSEIF %left T_ELSE %left T_ENDIF %token T_LNUMBER %token T_DNUMBER %token T_STRING %token T_STRING_VARNAME %token T_VARIABLE %token T_NUM_STRING %token T_INLINE_HTML %token T_ENCAPSED_AND_WHITESPACE %token T_CONSTANT_ENCAPSED_STRING %token T_ECHO %token T_DO %token T_WHILE %token T_ENDWHILE %token T_FOR %token T_ENDFOR %token T_FOREACH %token T_ENDFOREACH %token T_DECLARE %token T_ENDDECLARE %token T_AS %token T_SWITCH %token T_MATCH %token T_ENDSWITCH %token T_CASE %token T_DEFAULT %token T_BREAK %token T_CONTINUE %token T_GOTO %token T_FUNCTION %token T_FN %token T_CONST %token T_RETURN %token T_TRY %token T_CATCH %token T_FINALLY %token T_THROW %token T_USE %token T_INSTEADOF %token T_GLOBAL %token T_STATIC T_ABSTRACT T_FINAL T_PRIVATE T_PROTECTED T_PUBLIC T_READONLY %token T_PUBLIC_SET %token T_PROTECTED_SET %token T_PRIVATE_SET %token T_VAR %token T_UNSET %token T_ISSET %token T_EMPTY %token T_HALT_COMPILER %token T_CLASS %token T_TRAIT %token T_INTERFACE %token T_ENUM %token T_EXTENDS %token T_IMPLEMENTS %token T_OBJECT_OPERATOR %token T_NULLSAFE_OBJECT_OPERATOR %token T_DOUBLE_ARROW %token T_LIST %token T_ARRAY %token T_CALLABLE %token T_CLASS_C %token T_TRAIT_C %token T_METHOD_C %token T_FUNC_C %token T_PROPERTY_C %token T_LINE %token T_FILE %token T_START_HEREDOC %token T_END_HEREDOC %token T_DOLLAR_OPEN_CURLY_BRACES %token T_CURLY_OPEN %token T_PAAMAYIM_NEKUDOTAYIM %token T_NAMESPACE %token T_NS_C %token T_DIR %token T_NS_SEPARATOR %token T_ELLIPSIS %token T_NAME_FULLY_QUALIFIED %token T_NAME_QUALIFIED %token T_NAME_RELATIVE %token T_ATTRIBUTE %token T_ENUM %% start: top_statement_list { $$ = $this->handleNamespaces($1); } ; top_statement_list_ex: top_statement_list_ex top_statement { pushNormalizing($1, $2); } | /* empty */ { init(); } ; top_statement_list: top_statement_list_ex { makeZeroLengthNop($nop); if ($nop !== null) { $1[] = $nop; } $$ = $1; } ; ampersand: T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG | T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG ; 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_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_FN | T_MATCH | T_ENUM | T_ECHO { $$ = $1; if ($$ === "emitError(new Error('Cannot use "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 ; top_statement: statement | function_declaration_statement | class_declaration_statement | T_HALT_COMPILER '(' ')' ';' { $$ = Stmt\HaltCompiler[$this->handleHaltCompiler()]; } | T_NAMESPACE namespace_declaration_name semi { $$ = 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 | T_CONST constant_declaration_list semi { $$ = Stmt\Const_[$2]; } ; use_type: T_FUNCTION { $$ = Stmt\Use_::TYPE_FUNCTION; } | T_CONST { $$ = Stmt\Use_::TYPE_CONSTANT; } ; group_use_declaration: T_USE use_type legacy_namespace_name T_NS_SEPARATOR '{' unprefixed_use_declarations '}' semi { $$ = Stmt\GroupUse[$3, $6, $2]; } | T_USE legacy_namespace_name T_NS_SEPARATOR '{' inline_use_declarations '}' semi { $$ = Stmt\GroupUse[$2, $5, Stmt\Use_::TYPE_UNKNOWN]; } ; unprefixed_use_declarations: non_empty_unprefixed_use_declarations optional_comma ; non_empty_unprefixed_use_declarations: non_empty_unprefixed_use_declarations ',' unprefixed_use_declaration { push($1, $3); } | unprefixed_use_declaration { init($1); } ; use_declarations: non_empty_use_declarations no_comma ; non_empty_use_declarations: non_empty_use_declarations ',' use_declaration { push($1, $3); } | use_declaration { init($1); } ; inline_use_declarations: non_empty_inline_use_declarations optional_comma ; non_empty_inline_use_declarations: non_empty_inline_use_declarations ',' inline_use_declaration { push($1, $3); } | inline_use_declaration { init($1); } ; unprefixed_use_declaration: namespace_name { $$ = Node\UseItem[$1, null, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #1); } | namespace_name T_AS identifier_not_reserved { $$ = Node\UseItem[$1, $3, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #3); } ; use_declaration: legacy_namespace_name { $$ = Node\UseItem[$1, null, Stmt\Use_::TYPE_UNKNOWN]; $this->checkUseUse($$, #1); } | legacy_namespace_name T_AS identifier_not_reserved { $$ = Node\UseItem[$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; $$->type = $1; } ; constant_declaration_list: non_empty_constant_declaration_list no_comma ; non_empty_constant_declaration_list: non_empty_constant_declaration_list ',' constant_declaration { push($1, $3); } | constant_declaration { init($1); } ; constant_declaration: identifier_not_reserved '=' expr { $$ = Node\Const_[$1, $3]; } ; class_const_list: non_empty_class_const_list no_comma ; non_empty_class_const_list: non_empty_class_const_list ',' class_const { push($1, $3); } | class_const { init($1); } ; class_const: T_STRING '=' expr { $$ = Node\Const_[new Node\Identifier($1, stackAttributes(#1)), $3]; } | semi_reserved '=' expr { $$ = Node\Const_[new Node\Identifier($1, stackAttributes(#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); if ($nop !== null) { $1[] = $nop; } $$ = $1; } ; inner_statement: statement | function_declaration_statement | class_declaration_statement | T_HALT_COMPILER { throw new Error('__HALT_COMPILER() can only be used from the outermost scope', attributes()); } ; non_empty_statement: '{' inner_statement_list '}' { $$ = Stmt\Block[$2]; } | T_IF '(' expr ')' blocklike_statement elseif_list else_single { $$ = Stmt\If_[$3, ['stmts' => $5, 'elseifs' => $6, 'else' => $7]]; } | T_IF '(' expr ')' ':' inner_statement_list new_elseif_list new_else_single T_ENDIF ';' { $$ = Stmt\If_[$3, ['stmts' => $6, 'elseifs' => $7, 'else' => $8]]; } | T_WHILE '(' expr ')' while_statement { $$ = Stmt\While_[$3, $5]; } | T_DO blocklike_statement T_WHILE '(' expr ')' ';' { $$ = Stmt\Do_ [$5, $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 { $$ = Stmt\InlineHTML[$1]; $$->setAttribute('hasLeadingNewline', $this->inlineHtmlHasLeadingNewline(#1)); } | expr semi { $$ = Stmt\Expression[$1]; } | T_UNSET '(' variables_list ')' semi { $$ = 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_not_reserved semi { $$ = Stmt\Goto_[$2]; } | identifier_not_reserved ':' { $$ = Stmt\Label[$1]; } | error { $$ = null; /* means: no statement */ } ; statement: non_empty_statement | ';' { makeNop($$); } ; blocklike_statement: statement { toBlock($1); } ; 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 '}' { $$ = Stmt\Finally_[$3]; } ; variables_list: non_empty_variables_list optional_comma ; non_empty_variables_list: variable { init($1); } | non_empty_variables_list ',' variable { push($1, $3); } ; optional_ref: /* empty */ { $$ = false; } | ampersand { $$ = true; } ; optional_arg_ref: /* empty */ { $$ = false; } | T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG { $$ = true; } ; optional_ellipsis: /* empty */ { $$ = false; } | T_ELLIPSIS { $$ = true; } ; block_or_error: '{' inner_statement_list '}' { $$ = $2; } | error { $$ = []; } ; fn_identifier: identifier_not_reserved | T_READONLY { $$ = Node\Identifier[$1]; } | T_EXIT { $$ = Node\Identifier[$1]; } ; function_declaration_statement: T_FUNCTION optional_ref fn_identifier '(' parameter_list ')' optional_return_type block_or_error { $$ = Stmt\Function_[$3, ['byRef' => $2, 'params' => $5, 'returnType' => $7, 'stmts' => $8, 'attrGroups' => []]]; } | attributes T_FUNCTION optional_ref fn_identifier '(' parameter_list ')' optional_return_type block_or_error { $$ = Stmt\Function_[$4, ['byRef' => $3, 'params' => $6, 'returnType' => $8, 'stmts' => $9, 'attrGroups' => $1]]; } ; class_declaration_statement: class_entry_type identifier_not_reserved extends_from implements_list '{' class_statement_list '}' { $$ = Stmt\Class_[$2, ['type' => $1, 'extends' => $3, 'implements' => $4, 'stmts' => $6, 'attrGroups' => []]]; $this->checkClass($$, #2); } | attributes class_entry_type identifier_not_reserved extends_from implements_list '{' class_statement_list '}' { $$ = Stmt\Class_[$3, ['type' => $2, 'extends' => $4, 'implements' => $5, 'stmts' => $7, 'attrGroups' => $1]]; $this->checkClass($$, #3); } | optional_attributes T_INTERFACE identifier_not_reserved interface_extends_list '{' class_statement_list '}' { $$ = Stmt\Interface_[$3, ['extends' => $4, 'stmts' => $6, 'attrGroups' => $1]]; $this->checkInterface($$, #3); } | optional_attributes T_TRAIT identifier_not_reserved '{' class_statement_list '}' { $$ = Stmt\Trait_[$3, ['stmts' => $5, 'attrGroups' => $1]]; } | optional_attributes T_ENUM identifier_not_reserved enum_scalar_type implements_list '{' class_statement_list '}' { $$ = Stmt\Enum_[$3, ['scalarType' => $4, 'implements' => $5, 'stmts' => $7, 'attrGroups' => $1]]; $this->checkEnum($$, #3); } ; enum_scalar_type: /* empty */ { $$ = null; } | ':' type { $$ = $2; } enum_case_expr: /* empty */ { $$ = null; } | '=' expr { $$ = $2; } ; class_entry_type: T_CLASS { $$ = 0; } | class_modifiers T_CLASS ; class_modifiers: class_modifier | class_modifiers class_modifier { $this->checkClassModifier($1, $2, #2); $$ = $1 | $2; } ; class_modifier: T_ABSTRACT { $$ = Modifiers::ABSTRACT; } | T_FINAL { $$ = Modifiers::FINAL; } | T_READONLY { $$ = Modifiers::READONLY; } ; extends_from: /* empty */ { $$ = 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 { $$ = $2; } ; class_name_list: non_empty_class_name_list no_comma ; non_empty_class_name_list: class_name { init($1); } | non_empty_class_name_list ',' class_name { push($1, $3); } ; for_statement: blocklike_statement | ':' inner_statement_list T_ENDFOR ';' { $$ = $2; } ; foreach_statement: blocklike_statement | ':' inner_statement_list T_ENDFOREACH ';' { $$ = $2; } ; declare_statement: non_empty_statement { toBlock($1); } | ';' { $$ = null; } | ':' inner_statement_list T_ENDDECLARE ';' { $$ = $2; } ; declare_list: non_empty_declare_list no_comma ; non_empty_declare_list: declare_list_element { init($1); } | non_empty_declare_list ',' declare_list_element { push($1, $3); } ; declare_list_element: identifier_not_reserved '=' expr { $$ = Node\DeclareItem[$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 ; 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: blocklike_statement { $$ = $1; } | ':' inner_statement_list T_ENDWHILE ';' { $$ = $2; } ; elseif_list: /* empty */ { init(); } | elseif_list elseif { push($1, $2); } ; elseif: T_ELSEIF '(' expr ')' blocklike_statement { $$ = Stmt\ElseIf_[$3, $5]; } ; new_elseif_list: /* empty */ { init(); } | new_elseif_list new_elseif { push($1, $2); } ; new_elseif: T_ELSEIF '(' expr ')' ':' inner_statement_list { $$ = Stmt\ElseIf_[$3, $6]; $this->fixupAlternativeElse($$); } ; else_single: /* empty */ { $$ = null; } | T_ELSE blocklike_statement { $$ = Stmt\Else_[$2]; } ; new_else_single: /* empty */ { $$ = null; } | T_ELSE ':' inner_statement_list { $$ = Stmt\Else_[$3]; $this->fixupAlternativeElse($$); } ; foreach_variable: variable { $$ = array($1, false); } | ampersand variable { $$ = array($2, true); } | list_expr { $$ = array($1, false); } | array_short_syntax { $$ = array($this->fixupArrayDestructuring($1), false); } ; parameter_list: non_empty_parameter_list optional_comma | /* empty */ { $$ = array(); } ; non_empty_parameter_list: parameter { init($1); } | non_empty_parameter_list ',' parameter { push($1, $3); } ; optional_property_modifiers: /* empty */ { $$ = 0; } | optional_property_modifiers property_modifier { $this->checkModifier($1, $2, #2); $$ = $1 | $2; } ; property_modifier: T_PUBLIC { $$ = Modifiers::PUBLIC; } | T_PROTECTED { $$ = Modifiers::PROTECTED; } | T_PRIVATE { $$ = Modifiers::PRIVATE; } | T_PUBLIC_SET { $$ = Modifiers::PUBLIC_SET; } | T_PROTECTED_SET { $$ = Modifiers::PROTECTED_SET; } | T_PRIVATE_SET { $$ = Modifiers::PRIVATE_SET; } | T_READONLY { $$ = Modifiers::READONLY; } ; parameter: optional_attributes optional_property_modifiers optional_type_without_static optional_arg_ref optional_ellipsis plain_variable optional_property_hook_list { $$ = new Node\Param($6, null, $3, $4, $5, attributes(), $2, $1, $7); $this->checkParam($$); } | optional_attributes optional_property_modifiers optional_type_without_static optional_arg_ref optional_ellipsis plain_variable '=' expr optional_property_hook_list { $$ = new Node\Param($6, $8, $3, $4, $5, attributes(), $2, $1, $9); $this->checkParam($$); } | optional_attributes optional_property_modifiers optional_type_without_static optional_arg_ref optional_ellipsis error { $$ = new Node\Param(Expr\Error[], null, $3, $4, $5, attributes(), $2, $1); } ; type_expr: type | '?' type { $$ = Node\NullableType[$2]; } | union_type { $$ = Node\UnionType[$1]; } | intersection_type ; type: type_without_static | T_STATIC { $$ = Node\Name['static']; } ; type_without_static: name { $$ = $this->handleBuiltinTypes($1); } | T_ARRAY { $$ = Node\Identifier['array']; } | T_CALLABLE { $$ = Node\Identifier['callable']; } ; union_type_element: type | '(' intersection_type ')' { $$ = $2; } ; union_type: union_type_element '|' union_type_element { init($1, $3); } | union_type '|' union_type_element { push($1, $3); } ; union_type_without_static_element: type_without_static | '(' intersection_type_without_static ')' { $$ = $2; } ; union_type_without_static: union_type_without_static_element '|' union_type_without_static_element { init($1, $3); } | union_type_without_static '|' union_type_without_static_element { push($1, $3); } ; intersection_type_list: type T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type { init($1, $3); } | intersection_type_list T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type { push($1, $3); } ; intersection_type: intersection_type_list { $$ = Node\IntersectionType[$1]; } ; intersection_type_without_static_list: type_without_static T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static { init($1, $3); } | intersection_type_without_static_list T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static { push($1, $3); } ; intersection_type_without_static: intersection_type_without_static_list { $$ = Node\IntersectionType[$1]; } ; type_expr_without_static: type_without_static | '?' type_without_static { $$ = Node\NullableType[$2]; } | union_type_without_static { $$ = Node\UnionType[$1]; } | intersection_type_without_static ; optional_type_without_static: /* empty */ { $$ = null; } | type_expr_without_static ; optional_return_type: /* empty */ { $$ = null; } | ':' type_expr { $$ = $2; } | ':' error { $$ = null; } ; argument_list: '(' ')' { $$ = array(); } | '(' non_empty_argument_list optional_comma ')' { $$ = $2; } | '(' variadic_placeholder ')' { init($2); } ; variadic_placeholder: T_ELLIPSIS { $$ = Node\VariadicPlaceholder[]; } ; non_empty_argument_list: argument { init($1); } | non_empty_argument_list ',' argument { push($1, $3); } ; argument: expr { $$ = Node\Arg[$1, false, false]; } | ampersand variable { $$ = Node\Arg[$2, true, false]; } | T_ELLIPSIS expr { $$ = Node\Arg[$2, false, true]; } | identifier_maybe_reserved ':' expr { $$ = new Node\Arg($3, false, false, attributes(), $1); } ; global_var_list: non_empty_global_var_list no_comma ; non_empty_global_var_list: non_empty_global_var_list ',' global_var { push($1, $3); } | global_var { init($1); } ; global_var: simple_variable ; static_var_list: non_empty_static_var_list no_comma ; non_empty_static_var_list: non_empty_static_var_list ',' static_var { push($1, $3); } | static_var { init($1); } ; static_var: plain_variable { $$ = Node\StaticVar[$1, null]; } | plain_variable '=' expr { $$ = Node\StaticVar[$1, $3]; } ; class_statement_list_ex: class_statement_list_ex class_statement { if ($2 !== null) { push($1, $2); } else { $$ = $1; } } | /* empty */ { init(); } ; class_statement_list: class_statement_list_ex { makeZeroLengthNop($nop); if ($nop !== null) { $1[] = $nop; } $$ = $1; } ; class_statement: optional_attributes variable_modifiers optional_type_without_static property_declaration_list semi { $$ = new Stmt\Property($2, $4, attributes(), $3, $1); } #if PHP8 | optional_attributes variable_modifiers optional_type_without_static property_declaration_list '{' property_hook_list '}' { $$ = new Stmt\Property($2, $4, attributes(), $3, $1, $6); $this->checkPropertyHookList($6, #5); } #endif | 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_CONST type_expr class_const_list semi { $$ = new Stmt\ClassConst($5, $2, attributes(), $1, $4); $this->checkClassConst($$, #2); } | optional_attributes method_modifiers T_FUNCTION optional_ref identifier_maybe_reserved '(' 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 { $$ = Stmt\TraitUse[$2, $3]; } | optional_attributes T_CASE identifier_maybe_reserved enum_case_expr semi { $$ = Stmt\EnumCase[$3, $4, $1]; } | 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_maybe_reserved ';' { $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], $3, $4]; } | trait_method_reference T_AS member_modifier ';' { $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], $3, null]; } | trait_method_reference T_AS identifier_not_reserved ';' { $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], null, $3]; } | trait_method_reference T_AS reserved_non_modifiers_identifier ';' { $$ = Stmt\TraitUseAdaptation\Alias[$1[0], $1[1], null, $3]; } ; trait_method_reference_fully_qualified: name T_PAAMAYIM_NEKUDOTAYIM identifier_maybe_reserved { $$ = array($1, $3); } ; trait_method_reference: trait_method_reference_fully_qualified | identifier_maybe_reserved { $$ = array(null, $1); } ; method_body: ';' /* abstract method */ { $$ = null; } | block_or_error ; variable_modifiers: non_empty_member_modifiers | T_VAR { $$ = 0; } ; method_modifiers: /* empty */ { $$ = 0; } | non_empty_member_modifiers ; non_empty_member_modifiers: member_modifier | non_empty_member_modifiers member_modifier { $this->checkModifier($1, $2, #2); $$ = $1 | $2; } ; member_modifier: T_PUBLIC { $$ = Modifiers::PUBLIC; } | T_PROTECTED { $$ = Modifiers::PROTECTED; } | T_PRIVATE { $$ = Modifiers::PRIVATE; } | T_PUBLIC_SET { $$ = Modifiers::PUBLIC_SET; } | T_PROTECTED_SET { $$ = Modifiers::PROTECTED_SET; } | T_PRIVATE_SET { $$ = Modifiers::PRIVATE_SET; } | T_STATIC { $$ = Modifiers::STATIC; } | T_ABSTRACT { $$ = Modifiers::ABSTRACT; } | T_FINAL { $$ = Modifiers::FINAL; } | T_READONLY { $$ = Modifiers::READONLY; } ; property_declaration_list: non_empty_property_declaration_list no_comma ; non_empty_property_declaration_list: property_declaration { init($1); } | non_empty_property_declaration_list ',' property_declaration { push($1, $3); } ; property_decl_name: T_VARIABLE { $$ = Node\VarLikeIdentifier[parseVar($1)]; } ; property_declaration: property_decl_name { $$ = Node\PropertyItem[$1, null]; } | property_decl_name '=' expr { $$ = Node\PropertyItem[$1, $3]; } ; property_hook_list: /* empty */ { $$ = []; } | property_hook_list property_hook { push($1, $2); } ; optional_property_hook_list: /* empty */ { $$ = []; } #if PHP8 | '{' property_hook_list '}' { $$ = $2; $this->checkPropertyHookList($2, #1); } #endif ; property_hook: optional_attributes property_hook_modifiers optional_ref identifier_not_reserved property_hook_body { $$ = Node\PropertyHook[$4, $5, ['flags' => $2, 'byRef' => $3, 'params' => [], 'attrGroups' => $1]]; $this->checkPropertyHook($$, null); } | optional_attributes property_hook_modifiers optional_ref identifier_not_reserved '(' parameter_list ')' property_hook_body { $$ = Node\PropertyHook[$4, $8, ['flags' => $2, 'byRef' => $3, 'params' => $6, 'attrGroups' => $1]]; $this->checkPropertyHook($$, #5); } ; property_hook_body: ';' { $$ = null; } | '{' inner_statement_list '}' { $$ = $2; } | T_DOUBLE_ARROW expr ';' { $$ = $2; } ; property_hook_modifiers: /* empty */ { $$ = 0; } | property_hook_modifiers member_modifier { $this->checkPropertyHookModifiers($1, $2, #2); $$ = $1 | $2; } ; expr_list_forbid_comma: non_empty_expr_list no_comma ; expr_list_allow_comma: non_empty_expr_list optional_comma ; non_empty_expr_list: non_empty_expr_list ',' expr { push($1, $3); } | expr { init($1); } ; for_expr: /* empty */ { $$ = array(); } | expr_list_forbid_comma ; expr: variable | list_expr '=' expr { $$ = Expr\Assign[$1, $3]; } | array_short_syntax '=' expr { $$ = Expr\Assign[$this->fixupArrayDestructuring($1), $3]; } | variable '=' expr { $$ = Expr\Assign[$1, $3]; } | variable '=' ampersand variable { $$ = Expr\AssignRef[$1, $4]; } | variable '=' ampersand new_expr { $$ = Expr\AssignRef[$1, $4]; if (!$this->phpVersion->allowsAssignNewByReference()) { $this->emitError(new Error('Cannot assign new by reference', attributes())); } } | new_expr | match | T_CLONE expr { $$ = 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 { $$ = Expr\BinaryOp\BitwiseOr [$1, $3]; } | expr T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG expr { $$ = Expr\BinaryOp\BitwiseAnd[$1, $3]; } | expr T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG 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 { $$ = Expr\Cast\Unset_ [$2]; } | T_EXIT ctor_arguments { $$ = $this->createExitExpr($1, #1, $2, attributes()); } | '@' expr { $$ = Expr\ErrorSuppress[$2]; } | scalar | '`' backticks_expr '`' { $$ = 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 %prec T_THROW { $$ = Expr\ArrowFunction[['static' => false, 'byRef' => $2, 'params' => $4, 'returnType' => $6, 'expr' => $8, 'attrGroups' => []]]; } | T_STATIC T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr %prec T_THROW { $$ = 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 %prec T_THROW { $$ = Expr\ArrowFunction[['static' => false, 'byRef' => $3, 'params' => $5, 'returnType' => $7, 'expr' => $9, 'attrGroups' => $1]]; } | attributes T_STATIC T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr %prec T_THROW { $$ = 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 class_entry_type ctor_arguments extends_from implements_list '{' class_statement_list '}' { $$ = array(Stmt\Class_[null, ['type' => $2, 'extends' => $4, 'implements' => $5, 'stmts' => $7, 'attrGroups' => $1]], $3); $this->checkClass($$[0], -1); } ; new_dereferenceable: T_NEW class_name_reference argument_list { $$ = Expr\New_[$2, $3]; } | T_NEW anonymous_class { list($class, $ctorArgs) = $2; $$ = Expr\New_[$class, $ctorArgs]; } ; new_non_dereferenceable: T_NEW class_name_reference { $$ = Expr\New_[$2, []]; } ; new_expr: new_dereferenceable | new_non_dereferenceable ; lexical_vars: /* empty */ { $$ = array(); } | T_USE '(' lexical_var_list ')' { $$ = $3; } ; lexical_var_list: non_empty_lexical_var_list optional_comma ; non_empty_lexical_var_list: lexical_var { init($1); } | non_empty_lexical_var_list ',' lexical_var { push($1, $3); } ; lexical_var: optional_ref plain_variable { $$ = Node\ClosureUse[$2, $1]; } ; name_readonly: T_READONLY { $$ = Name[$1]; } ; function_call: name argument_list { $$ = Expr\FuncCall[$1, $2]; } | name_readonly 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 ; 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 | new_variable | '(' expr ')' { $$ = $2; } | error { $$ = Expr\Error[]; $this->errorState = 2; } ; class_name_or_var: class_name | fully_dereferenceable ; backticks_expr: /* empty */ { $$ = array(); } | encaps_string_part { $$ = array($1); parseEncapsed($$, '`', $this->phpVersion->supportsUnicodeEscapes()); } | encaps_list { parseEncapsed($1, '`', $this->phpVersion->supportsUnicodeEscapes()); $$ = $1; } ; ctor_arguments: /* empty */ { $$ = array(); } | argument_list ; constant: name { $$ = 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_[]; } | T_PROPERTY_C { $$ = Scalar\MagicConst\Property[]; } ; class_constant: class_name_or_var T_PAAMAYIM_NEKUDOTAYIM identifier_maybe_reserved { $$ = Expr\ClassConstFetch[$1, $3]; } | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM '{' expr '}' { $$ = Expr\ClassConstFetch[$1, $4]; } /* We interpret an isolated FOO:: as an unfinished class constant fetch. It could also be an unfinished static property fetch or unfinished scoped call. */ | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM error { $$ = 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; $$ = new Expr\Array_($2, $attrs); } ; dereferenceable_scalar: T_ARRAY '(' array_pair_list ')' { $attrs = attributes(); $attrs['kind'] = Expr\Array_::KIND_LONG; $$ = new Expr\Array_($3, $attrs); $this->createdArrays->attach($$); } | array_short_syntax { $$ = $1; $this->createdArrays->attach($$); } | T_CONSTANT_ENCAPSED_STRING { $$ = Scalar\String_::fromString($1, attributes(), $this->phpVersion->supportsUnicodeEscapes()); } | '"' encaps_list '"' { $attrs = attributes(); $attrs['kind'] = Scalar\String_::KIND_DOUBLE_QUOTED; parseEncapsed($2, '"', $this->phpVersion->supportsUnicodeEscapes()); $$ = new Scalar\InterpolatedString($2, $attrs); } ; scalar: T_LNUMBER { $$ = $this->parseLNumber($1, attributes(), $this->phpVersion->allowsInvalidOctals()); } | T_DNUMBER { $$ = Scalar\Float_::fromString($1, attributes()); } | dereferenceable_scalar | constant | class_constant | T_START_HEREDOC T_ENCAPSED_AND_WHITESPACE T_END_HEREDOC { $$ = $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 */ { $$ = null; } | expr ; fully_dereferenceable: variable | '(' expr ')' { $$ = $2; } | dereferenceable_scalar | class_constant | new_dereferenceable ; array_object_dereferenceable: fully_dereferenceable | constant ; callable_expr: callable_variable | '(' expr ')' { $$ = $2; } | dereferenceable_scalar | new_dereferenceable ; callable_variable: simple_variable | array_object_dereferenceable '[' optional_expr ']' { $$ = Expr\ArrayDimFetch[$1, $3]; } #if PHP7 | array_object_dereferenceable '{' expr '}' { $$ = Expr\ArrayDimFetch[$1, $3]; } #endif | function_call | array_object_dereferenceable T_OBJECT_OPERATOR property_name argument_list { $$ = Expr\MethodCall[$1, $3, $4]; } | array_object_dereferenceable T_NULLSAFE_OBJECT_OPERATOR property_name argument_list { $$ = Expr\NullsafeMethodCall[$1, $3, $4]; } ; optional_plain_variable: /* empty */ { $$ = null; } | plain_variable ; variable: callable_variable | static_member | array_object_dereferenceable T_OBJECT_OPERATOR property_name { $$ = Expr\PropertyFetch[$1, $3]; } | array_object_dereferenceable T_NULLSAFE_OBJECT_OPERATOR property_name { $$ = Expr\NullsafePropertyFetch[$1, $3]; } ; simple_variable: plain_variable | '$' '{' 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 { $$ = Expr\StaticPropertyFetch[$1, $3]; } ; new_variable: simple_variable | new_variable '[' optional_expr ']' { $$ = Expr\ArrayDimFetch[$1, $3]; } #if PHP7 | new_variable '{' expr '}' { $$ = Expr\ArrayDimFetch[$1, $3]; } #endif | new_variable T_OBJECT_OPERATOR property_name { $$ = 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 { $$ = Expr\StaticPropertyFetch[$1, $3]; } ; member_name: identifier_maybe_reserved | '{' expr '}' { $$ = $2; } | simple_variable ; property_name: identifier_not_reserved | '{' expr '}' { $$ = $2; } | simple_variable | error { $$ = Expr\Error[]; $this->errorState = 2; } ; list_expr: T_LIST '(' inner_array_pair_list ')' { $$ = Expr\List_[$3]; $$->setAttribute('kind', Expr\List_::KIND_LIST); $this->postprocessList($$); } ; array_pair_list: inner_array_pair_list { $$ = $1; $end = count($$)-1; if ($$[$end]->value instanceof Expr\Error) 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 { $$ = Node\ArrayItem[$1, null, false]; } | ampersand variable { $$ = Node\ArrayItem[$2, null, true]; } | list_expr { $$ = Node\ArrayItem[$1, null, false]; } | expr T_DOUBLE_ARROW expr { $$ = Node\ArrayItem[$3, $1, false]; } | expr T_DOUBLE_ARROW ampersand variable { $$ = Node\ArrayItem[$4, $1, true]; } | expr T_DOUBLE_ARROW list_expr { $$ = Node\ArrayItem[$3, $1, false]; } | T_ELLIPSIS expr { $$ = new Node\ArrayItem($2, null, false, attributes(), true); } | /* empty */ { /* Create an Error node now to remember the position. We'll later either report an error, or convert this into a null element, depending on whether this is a creation or destructuring context. */ $attrs = $this->createEmptyElemAttributes($this->tokenPos); $$ = new Node\ArrayItem(new Expr\Error($attrs), null, false, $attrs); } ; 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 { $attrs = attributes(); $attrs['rawValue'] = $1; $$ = new Node\InterpolatedStringPart($1, $attrs); } ; encaps_str_varname: T_STRING_VARNAME { $$ = Expr\Variable[$1]; } ; encaps_var: plain_variable | plain_variable '[' encaps_var_offset ']' { $$ = Expr\ArrayDimFetch[$1, $3]; } | plain_variable T_OBJECT_OPERATOR identifier_not_reserved { $$ = Expr\PropertyFetch[$1, $3]; } | plain_variable T_NULLSAFE_OBJECT_OPERATOR identifier_not_reserved { $$ = Expr\NullsafePropertyFetch[$1, $3]; } | T_DOLLAR_OPEN_CURLY_BRACES expr '}' { $$ = 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 ; %%