diff options
Diffstat (limited to 'vendor/nikic/php-parser/grammar/php7.y')
| -rw-r--r-- | vendor/nikic/php-parser/grammar/php7.y | 1196 |
1 files changed, 1196 insertions, 0 deletions
diff --git a/vendor/nikic/php-parser/grammar/php7.y b/vendor/nikic/php-parser/grammar/php7.y new file mode 100644 index 000000000..eac68d095 --- /dev/null +++ b/vendor/nikic/php-parser/grammar/php7.y @@ -0,0 +1,1196 @@ +%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; } +; + +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_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 | T_ENUM +; + +semi_reserved: + reserved_non_modifiers + | T_STATIC | T_ABSTRACT | T_FINAL | T_PRIVATE | T_PROTECTED | T_PUBLIC | T_READONLY +; + +identifier_maybe_reserved: + T_STRING { $$ = Node\Identifier[$1]; } + | semi_reserved { $$ = Node\Identifier[$1]; } +; + +identifier_not_reserved: + 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($$, #1); } + | namespace_name T_AS identifier_not_reserved + { $$ = 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($$, #1); } + | legacy_namespace_name T_AS identifier_not_reserved + { $$ = 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_not_reserved '=' 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_maybe_reserved '=' 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_not_reserved semi { $$ = Stmt\Goto_[$2]; } + | identifier_not_reserved ':' { $$ = 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; } + | 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 { $$ = []; } +; + +function_declaration_statement: + T_FUNCTION optional_ref identifier_not_reserved '(' parameter_list ')' optional_return_type block_or_error + { $$ = Stmt\Function_[$3, ['byRef' => $2, 'params' => $5, 'returnType' => $7, 'stmts' => $8, 'attrGroups' => []]]; } + | attributes T_FUNCTION optional_ref identifier_not_reserved '(' parameter_list ')' optional_return_type block_or_error + { $$ = Stmt\Function_[$4, ['byRef' => $3, 'params' => $6, 'returnType' => $8, 'stmts' => $9, 'attrGroups' => $1]]; } +; + +class_declaration_statement: + optional_attributes class_entry_type identifier_not_reserved extends_from implements_list '{' class_statement_list '}' + { $$ = 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 { $$ = 0; } + | T_ABSTRACT T_CLASS { $$ = 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_not_reserved '=' 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 { $$ = array($1, false); } + | ampersand variable { $$ = 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_property_modifiers: + /* empty */ { $$ = 0; } + | optional_property_modifiers property_modifier + { $this->checkModifier($1, $2, #2); $$ = $1 | $2; } +; + +property_modifier: + T_PUBLIC { $$ = Stmt\Class_::MODIFIER_PUBLIC; } + | T_PROTECTED { $$ = Stmt\Class_::MODIFIER_PROTECTED; } + | T_PRIVATE { $$ = Stmt\Class_::MODIFIER_PRIVATE; } + | T_READONLY { $$ = Stmt\Class_::MODIFIER_READONLY; } +; + +parameter: + optional_attributes optional_property_modifiers optional_type_without_static + optional_arg_ref optional_ellipsis plain_variable + { $$ = new Node\Param($6, null, $3, $4, $5, attributes(), $2, $1); + $this->checkParam($$); } + | optional_attributes optional_property_modifiers optional_type_without_static + optional_arg_ref optional_ellipsis plain_variable '=' expr + { $$ = new Node\Param($6, $8, $3, $4, $5, attributes(), $2, $1); + $this->checkParam($$); } + | optional_attributes optional_property_modifiers optional_type_without_static + optional_arg_ref optional_ellipsis error + { $$ = new Node\Param(Expr\Error[], null, $3, $4, $5, attributes(), $2, $1); } +; + +type_expr: + type { $$ = $1; } + | '?' type { $$ = Node\NullableType[$2]; } + | union_type { $$ = Node\UnionType[$1]; } + | intersection_type { $$ = Node\IntersectionType[$1]; } +; + +type: + type_without_static { $$ = $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); } +; + +intersection_type: + type T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type { init($1, $3); } + | intersection_type T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type + { push($1, $3); } +; + +intersection_type_without_static: + type_without_static T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static + { init($1, $3); } + | intersection_type_without_static T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static + { push($1, $3); } +; + +type_expr_without_static: + type_without_static { $$ = $1; } + | '?' type_without_static { $$ = Node\NullableType[$2]; } + | union_type_without_static { $$ = Node\UnionType[$1]; } + | intersection_type_without_static { $$ = Node\IntersectionType[$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 ')' { $$ = $2; } + | '(' variadic_placeholder ')' { init($2); } +; + +variadic_placeholder: + T_ELLIPSIS { $$ = 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 { $$ = $1; } +; + +non_empty_global_var_list: + non_empty_global_var_list ',' global_var { push($1, $3); } + | global_var { init($1); } +; + +global_var: + simple_variable { $$ = $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_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 { $$ = array($1, $3); } +; +trait_method_reference: + trait_method_reference_fully_qualified { $$ = $1; } + | identifier_maybe_reserved { $$ = array(null, $1); } +; + +method_body: + ';' /* abstract method */ { $$ = 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 { $$ = Stmt\Class_::MODIFIER_FINAL; } + | T_READONLY { $$ = Stmt\Class_::MODIFIER_READONLY; } +; + +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 '=' ampersand 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 { $$ = Expr\BinaryOp\BitwiseOr [$1, $3]; } + | expr T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG expr { $$ = 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 { $$ = Expr\Cast\Unset_ [$2]; } + | T_EXIT exit_expr + { $attrs = attributes(); + $attrs['kind'] = strtolower($1) === 'exit' ? Expr\Exit_::KIND_EXIT : Expr\Exit_::KIND_DIE; + $$ = 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 { $$ = Expr\Throw_[$2]; } + + | T_FN optional_ref '(' parameter_list ')' optional_return_type T_DOUBLE_ARROW expr %prec T_THROW + { $$ = 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 + { $$ = Expr\Closure[['static' => true, 'byRef' => $4, 'params' => $6, 'uses' => $8, 'returnType' => $9, 'stmts' => $10, 'attrGroups' => $1]]; } +; + +anonymous_class: + optional_attributes T_CLASS ctor_arguments extends_from implements_list '{' class_statement_list '}' + { $$ = 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_maybe_reserved + { $$ = Expr\ClassConstFetch[$1, $3]; } + /* We interpret an isolated FOO:: as an unfinished class constant fetch. It could also be + an unfinished static property fetch or unfinished scoped call. */ + | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM error + { $$ = 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 + { $$ = Expr\StaticPropertyFetch[$1, $3]; } +; + +member_name: + identifier_maybe_reserved { $$ = $1; } + | '{' expr '}' { $$ = $2; } + | simple_variable { $$ = $1; } +; + +property_name: + identifier_not_reserved { $$ = $1; } + | '{' expr '}' { $$ = $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 { $$ = Expr\ArrayItem[$1, null, false]; } + | ampersand variable { $$ = 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 ampersand 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_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 { $$ = $this->parseNumString('-' . $2, attributes()); } + | plain_variable { $$ = $1; } +; + +%% |