Na}{

File Content: `php5.y`

%pure_parser
%expect 6

%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
;

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_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)]; }
;

top_statement:
      statement                                             { $$ = $1; }
    | function_declaration_statement                        { $$ = $1; }
    | class_declaration_statement                           { $$ = $1; }
    | T_HALT_COMPILER
          { $$ = Stmt\HaltCompiler[$this->lexer->handleHaltCompiler()]; }
    | T_NAMESPACE namespace_name ';'
          { $$ = Stmt\Namespace_[$2, null];
            $$->setAttribute('kind', Stmt\Namespace_::KIND_SEMICOLON);
            $this->checkNamespace($$); }
    | T_NAMESPACE namespace_name '{' top_statement_list '}'
          { $$ = 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($$); }
    | T_USE use_declarations ';'                            { $$ = Stmt\Use_[$2, Stmt\Use_::TYPE_NORMAL]; }
    | T_USE use_type use_declarations ';'                   { $$ = Stmt\Use_[$3, $2]; }
    | group_use_declaration ';'                             { $$ = $1; }
    | T_CONST constant_declaration_list ';'                 { $$ = 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:
      unprefixed_use_declarations ',' unprefixed_use_declaration
          { push($1, $3); }
    | unprefixed_use_declaration                            { init($1); }
;

use_declarations:
      use_declarations ',' use_declaration                  { push($1, $3); }
    | use_declaration                                       { init($1); }
;

inline_use_declarations:
      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:
      constant_declaration_list ',' constant_declaration    { push($1, $3); }
    | constant_declaration                                  { init($1); }
;

constant_declaration:
    identifier '=' static_scalar                            { $$ = Node\Const_[$1, $3]; }
;

class_const_list:
      class_const_list ',' class_const                      { push($1, $3); }
    | class_const                                           { init($1); }
;

class_const:
    identifier_ex '=' static_scalar                         { $$ = 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($$, $this->startAttributeStack[#1], $this->endAttributes);
            if (null === $$) { $$ = array(); }
        }
    }
    | T_IF parentheses_expr statement elseif_list else_single
          { $$ = Stmt\If_[$2, ['stmts' => toArray($3), 'elseifs' => $4, 'else' => $5]]; }
    | T_IF parentheses_expr ':' inner_statement_list new_elseif_list new_else_single T_ENDIF ';'
          { $$ = Stmt\If_[$2, ['stmts' => $4, 'elseifs' => $5, 'else' => $6]]; }
    | T_WHILE parentheses_expr while_statement              { $$ = Stmt\While_[$2, $3]; }
    | T_DO statement T_WHILE parentheses_expr ';'           { $$ = Stmt\Do_   [$4, toArray($2)]; }
    | T_FOR '(' for_expr ';'  for_expr ';' for_expr ')' for_statement
          { $$ = Stmt\For_[['init' => $3, 'cond' => $5, 'loop' => $7, 'stmts' => $9]]; }
    | T_SWITCH parentheses_expr switch_case_list            { $$ = Stmt\Switch_[$2, $3]; }
    | T_BREAK ';'                                           { $$ = Stmt\Break_[null]; }
    | T_BREAK expr ';'                                      { $$ = Stmt\Break_[$2]; }
    | T_CONTINUE ';'                                        { $$ = Stmt\Continue_[null]; }
    | T_CONTINUE expr ';'                                   { $$ = Stmt\Continue_[$2]; }
    | T_RETURN ';'                                          { $$ = Stmt\Return_[null]; }
    | T_RETURN expr ';'                                     { $$ = Stmt\Return_[$2]; }
    | T_GLOBAL global_var_list ';'                          { $$ = Stmt\Global_[$2]; }
    | T_STATIC static_var_list ';'                          { $$ = Stmt\Static_[$2]; }
    | T_ECHO expr_list ';'                                  { $$ = Stmt\Echo_[$2]; }
    | T_INLINE_HTML                                         { $$ = Stmt\InlineHTML[$1]; }
    | yield_expr ';'                                        { $$ = Stmt\Expression[$1]; }
    | expr ';'                                              { $$ = Stmt\Expression[$1]; }
    | T_UNSET '(' variables_list ')' ';'                    { $$ = 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_DECLARE '(' declare_list ')' declare_statement      { $$ = Stmt\Declare_[$3, $5]; }
    | T_TRY '{' inner_statement_list '}' catches optional_finally
          { $$ = Stmt\TryCatch[$3, $5, $6]; $this->checkTryCatch($$); }
    | T_THROW expr ';'                                      { $$ = Stmt\Throw_[$2]; }
    | T_GOTO identifier ';'                                 { $$ = Stmt\Goto_[$2]; }
    | identifier ':'                                        { $$ = Stmt\Label[$1]; }
    | expr error                                            { $$ = Stmt\Expression[$1]; }
    | error                                                 { $$ = 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); }
;

catch:
    T_CATCH '(' name plain_variable ')' '{' inner_statement_list '}'
        { $$ = Stmt\Catch_[array($3), $4, $7]; }
;

optional_finally:
      /* empty */                                           { $$ = null; }
    | T_FINALLY '{' inner_statement_list '}'                { $$ = Stmt\Finally_[$3]; }
;

variables_list:
      variable                                              { init($1); }
    | 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; }
;

identifier_maybe_readonly:
      identifier                                            { $$ = $1; }
    | T_READONLY                                            { $$ = Node\Identifier[$1]; }
;

function_declaration_statement:
    T_FUNCTION optional_ref identifier_maybe_readonly '(' parameter_list ')' optional_return_type '{' inner_statement_list '}'
        { $$ = Stmt\Function_[$3, ['byRef' => $2, 'params' => $5, 'returnType' => $7, 'stmts' => $9]]; }
;

class_declaration_statement:
      class_entry_type identifier extends_from implements_list '{' class_statement_list '}'
          { $$ = Stmt\Class_[$2, ['type' => $1, 'extends' => $3, 'implements' => $4, 'stmts' => $6]];
            $this->checkClass($$, #2); }
    | T_INTERFACE identifier interface_extends_list '{' class_statement_list '}'
          { $$ = Stmt\Interface_[$2, ['extends' => $3, 'stmts' => $5]];
            $this->checkInterface($$, #2); }
    | T_TRAIT identifier '{' class_statement_list '}'
          { $$ = Stmt\Trait_[$2, ['stmts' => $4]]; }
;

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:
      class_name                                            { init($1); }
    | 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:
      declare_list_element                                  { init($1); }
    | declare_list ',' declare_list_element                 { push($1, $3); }
;

declare_list_element:
      identifier '=' static_scalar                          { $$ = 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:
      ':'
    | ';'
;

while_statement:
      statement                                             { $$ = toArray($1); }
    | ':' inner_statement_list T_ENDWHILE ';'               { $$ = $2; }
;

elseif_list:
      /* empty */                                           { init(); }
    | elseif_list elseif                                    { push($1, $2); }
;

elseif:
      T_ELSEIF parentheses_expr statement                   { $$ = Stmt\ElseIf_[$2, toArray($3)]; }
;

new_elseif_list:
      /* empty */                                           { init(); }
    | new_elseif_list new_elseif                            { push($1, $2); }
;

new_elseif:
     T_ELSEIF parentheses_expr ':' inner_statement_list     { $$ = Stmt\ElseIf_[$2, $4]; }
;

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); }
;

parameter_list:
      non_empty_parameter_list                              { $$ = $1; }
    | /* empty */                                           { $$ = array(); }
;

non_empty_parameter_list:
      parameter                                             { init($1); }
    | non_empty_parameter_list ',' parameter                { push($1, $3); }
;

parameter:
      optional_param_type optional_arg_ref optional_ellipsis plain_variable
          { $$ = Node\Param[$4, null, $1, $2, $3]; $this->checkParam($$); }
    | optional_param_type optional_arg_ref optional_ellipsis plain_variable '=' static_scalar
          { $$ = Node\Param[$4, $6, $1, $2, $3]; $this->checkParam($$); }
;

type:
      name                                                  { $$ = $1; }
    | T_ARRAY                                               { $$ = Node\Identifier['array']; }
    | T_CALLABLE                                            { $$ = Node\Identifier['callable']; }
;

optional_param_type:
      /* empty */                                           { $$ = null; }
    | type                                                  { $$ = $1; }
;

optional_return_type:
      /* empty */                                           { $$ = null; }
    | ':' type                                              { $$ = $2; }
;

argument_list:
      '(' ')'                                               { $$ = array(); }
    | '(' non_empty_argument_list ')'                       { $$ = $2; }
    | '(' yield_expr ')'                                    { $$ = array(Node\Arg[$2, false, false]); }
;

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]; }
;

global_var_list:
      global_var_list ',' global_var                        { push($1, $3); }
    | global_var                                            { init($1); }
;

global_var:
      plain_variable                                        { $$ = $1; }
    | '$' variable                                          { $$ = Expr\Variable[$2]; }
    | '$' '{' expr '}'                                      { $$ = Expr\Variable[$3]; }
;

static_var_list:
      static_var_list ',' static_var                        { push($1, $3); }
    | static_var                                            { init($1); }
;

static_var:
      plain_variable                                        { $$ = Stmt\StaticVar[$1, null]; }
    | plain_variable '=' static_scalar                      { $$ = 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:
      variable_modifiers property_declaration_list ';'
          { $$ = Stmt\Property[$1, $2]; $this->checkProperty($$, #1); }
    | T_CONST class_const_list ';'                          { $$ = Stmt\ClassConst[$2, 0]; }
    | method_modifiers T_FUNCTION optional_ref identifier_ex '(' parameter_list ')' optional_return_type method_body
          { $$ = Stmt\ClassMethod[$4, ['type' => $1, 'byRef' => $3, 'params' => $6, 'returnType' => $8, 'stmts' => $9]];
            $this->checkClassMethod($$, #1); }
    | T_USE class_name_list trait_adaptations               { $$ = Stmt\TraitUse[$2, $3]; }
;

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 */                             { $$ = null; }
    | '{' inner_statement_list '}'                          { $$ = $2; }
;

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:
      property_declaration                                  { init($1); }
    | property_declaration_list ',' property_declaration    { push($1, $3); }
;

property_decl_name:
      T_VARIABLE                                            { $$ = Node\VarLikeIdentifier[parseVar($1)]; }
;

property_declaration:
      property_decl_name                                    { $$ = Stmt\PropertyProperty[$1, null]; }
    | property_decl_name '=' static_scalar                  { $$ = Stmt\PropertyProperty[$1, $3]; }
;

expr_list:
      expr_list ',' expr                                    { push($1, $3); }
    | expr                                                  { init($1); }
;

for_expr:
      /* empty */                                           { $$ = array(); }
    | expr_list                                             { $$ = $1; }
;

expr:
      variable                                              { $$ = $1; }
    | list_expr '=' expr                                    { $$ = Expr\Assign[$1, $3]; }
    | variable '=' expr                                     { $$ = Expr\Assign[$1, $3]; }
    | variable '=' ampersand variable                       { $$ = Expr\AssignRef[$1, $4]; }
    | variable '=' ampersand new_expr                       { $$ = Expr\AssignRef[$1, $4]; }
    | new_expr                                              { $$ = $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]; }
    | parentheses_expr                                      { $$ = $1; }
    /* we need a separate '(' new_expr ')' rule to avoid problems caused by a s/r conflict */
    | '(' new_expr ')'                                      { $$ = $2; }
    | expr '?' expr ':' expr                                { $$ = Expr\Ternary[$1, $3,   $5]; }
    | expr '?' ':' expr                                     { $$ = Expr\Ternary[$1, null, $4]; }
    | expr T_COALESCE expr                                  { $$ = Expr\BinaryOp\Coalesce[$1, $3]; }
    | T_ISSET '(' variables_list ')'                        { $$ = Expr\Isset_[$3]; }
    | T_EMPTY '(' expr ')'                                  { $$ = Expr\Empty_[$3]; }
    | T_INCLUDE expr                                        { $$ = Expr\Include_[$2, Expr\Include_::TYPE_INCLUDE]; }
    | T_INCLUDE_ONCE expr                                   { $$ = Expr\Include_[$2, Expr\Include_::TYPE_INCLUDE_ONCE]; }
    | T_EVAL parentheses_expr                               { $$ = Expr\Eval_[$2]; }
    | 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; }
    | array_expr                                            { $$ = $1; }
    | scalar_dereference                                    { $$ = $1; }
    | '`' backticks_expr '`'                                { $$ = Expr\ShellExec[$2]; }
    | T_PRINT expr                                          { $$ = Expr\Print_[$2]; }
    | T_YIELD                                               { $$ = Expr\Yield_[null, null]; }
    | T_YIELD_FROM expr                                     { $$ = Expr\YieldFrom[$2]; }
    | T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type
      '{' inner_statement_list '}'
          { $$ = Expr\Closure[['static' => false, 'byRef' => $2, 'params' => $4, 'uses' => $6, 'returnType' => $7, 'stmts' => $9]]; }
    | T_STATIC T_FUNCTION optional_ref '(' parameter_list ')' lexical_vars optional_return_type
      '{' inner_statement_list '}'
          { $$ = Expr\Closure[['static' => true, 'byRef' => $3, 'params' => $5, 'uses' => $7, 'returnType' => $8, 'stmts' => $10]]; }
;

parentheses_expr:
      '(' expr ')'                                          { $$ = $2; }
    | '(' yield_expr ')'                                    { $$ = $2; }
;

yield_expr:
      T_YIELD expr                                          { $$ = Expr\Yield_[$2, null]; }
    | T_YIELD expr T_DOUBLE_ARROW expr                      { $$ = Expr\Yield_[$4, $2]; }
;

array_expr:
      T_ARRAY '(' array_pair_list ')'
          { $attrs = attributes(); $attrs['kind'] = Expr\Array_::KIND_LONG;
            $$ = new Expr\Array_($3, $attrs); }
    | '[' array_pair_list ']'
          { $attrs = attributes(); $attrs['kind'] = Expr\Array_::KIND_SHORT;
            $$ = new Expr\Array_($2, $attrs); }
;

scalar_dereference:
      array_expr '[' dim_offset ']'                         { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | T_CONSTANT_ENCAPSED_STRING '[' dim_offset ']'         { $$ = Expr\ArrayDimFetch[Scalar\String_::fromString($1, attributes()), $3]; }
    | constant '[' dim_offset ']'                           { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | scalar_dereference '[' dim_offset ']'                 { $$ = Expr\ArrayDimFetch[$1, $3]; }
    /* alternative array syntax missing intentionally */
;

anonymous_class:
      T_CLASS ctor_arguments extends_from implements_list '{' class_statement_list '}'
          { $$ = array(Stmt\Class_[null, ['type' => 0, 'extends' => $3, 'implements' => $4, 'stmts' => $6]], $2);
            $this->checkClass($$[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:
      lexical_var                                           { init($1); }
    | lexical_var_list ',' lexical_var                      { push($1, $3); }
;

lexical_var:
      optional_ref plain_variable                           { $$ = Expr\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]; }
    | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM identifier_ex argument_list
          { $$ = Expr\StaticCall[$1, $3, $4]; }
    | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM '{' expr '}' argument_list
          { $$ = Expr\StaticCall[$1, $4, $6]; }
    | static_property argument_list
          { $$ = $this->fixupPhp5StaticPropCall($1, $2, attributes()); }
    | variable_without_objects argument_list
          { $$ = Expr\FuncCall[$1, $2]; }
    | function_call '[' dim_offset ']'                      { $$ = Expr\ArrayDimFetch[$1, $3]; }
      /* alternative array syntax missing intentionally */
;

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                                            { $$ = $1; }
    | dynamic_class_name_reference                          { $$ = $1; }
;

dynamic_class_name_reference:
      object_access_for_dcnr                                { $$ = $1; }
    | base_variable                                         { $$ = $1; }
;

class_name_or_var:
      class_name                                            { $$ = $1; }
    | reference_variable                                    { $$ = $1; }
;

object_access_for_dcnr:
      base_variable T_OBJECT_OPERATOR object_property
          { $$ = Expr\PropertyFetch[$1, $3]; }
    | object_access_for_dcnr T_OBJECT_OPERATOR object_property
          { $$ = Expr\PropertyFetch[$1, $3]; }
    | object_access_for_dcnr '[' dim_offset ']'             { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | object_access_for_dcnr '{' expr '}'                   { $$ = Expr\ArrayDimFetch[$1, $3]; }
;

exit_expr:
      /* empty */                                           { $$ = null; }
    | '(' ')'                                               { $$ = null; }
    | parentheses_expr                                      { $$ = $1; }
;

backticks_expr:
      /* empty */                                           { $$ = array(); }
    | T_ENCAPSED_AND_WHITESPACE
          { $$ = array(Scalar\EncapsedStringPart[Scalar\String_::parseEscapeSequences($1, '`', false)]); }
    | encaps_list                                           { parseEncapsed($1, '`', false); $$ = $1; }
;

ctor_arguments:
      /* empty */                                           { $$ = array(); }
    | argument_list                                         { $$ = $1; }
;

common_scalar:
      T_LNUMBER                                             { $$ = $this->parseLNumber($1, attributes(), true); }
    | T_DNUMBER                                             { $$ = Scalar\DNumber::fromString($1, attributes()); }
    | T_CONSTANT_ENCAPSED_STRING                            { $$ = Scalar\String_::fromString($1, attributes(), false); }
    | T_LINE                                                { $$ = 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                                                { $$ = Scalar\MagicConst\Namespace_[]; }
    | T_START_HEREDOC T_ENCAPSED_AND_WHITESPACE T_END_HEREDOC
          { $$ = $this->parseDocString($1, $2, $3, attributes(), stackAttributes(#3), false); }
    | T_START_HEREDOC T_END_HEREDOC
          { $$ = $this->parseDocString($1, '', $2, attributes(), stackAttributes(#2), false); }
;

static_scalar:
      common_scalar                                         { $$ = $1; }
    | class_name T_PAAMAYIM_NEKUDOTAYIM identifier_ex       { $$ = Expr\ClassConstFetch[$1, $3]; }
    | name                                                  { $$ = Expr\ConstFetch[$1]; }
    | T_ARRAY '(' static_array_pair_list ')'                { $$ = Expr\Array_[$3]; }
    | '[' static_array_pair_list ']'                        { $$ = Expr\Array_[$2]; }
    | static_operation                                      { $$ = $1; }
;

static_operation:
      static_scalar T_BOOLEAN_OR static_scalar              { $$ = Expr\BinaryOp\BooleanOr [$1, $3]; }
    | static_scalar T_BOOLEAN_AND static_scalar             { $$ = Expr\BinaryOp\BooleanAnd[$1, $3]; }
    | static_scalar T_LOGICAL_OR static_scalar              { $$ = Expr\BinaryOp\LogicalOr [$1, $3]; }
    | static_scalar T_LOGICAL_AND static_scalar             { $$ = Expr\BinaryOp\LogicalAnd[$1, $3]; }
    | static_scalar T_LOGICAL_XOR static_scalar             { $$ = Expr\BinaryOp\LogicalXor[$1, $3]; }
    | static_scalar '|' static_scalar                       { $$ = Expr\BinaryOp\BitwiseOr [$1, $3]; }
    | static_scalar T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG static_scalar
          { $$ = Expr\BinaryOp\BitwiseAnd[$1, $3]; }
    | static_scalar T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG static_scalar
          { $$ = Expr\BinaryOp\BitwiseAnd[$1, $3]; }
    | static_scalar '^' static_scalar                       { $$ = Expr\BinaryOp\BitwiseXor[$1, $3]; }
    | static_scalar '.' static_scalar                       { $$ = Expr\BinaryOp\Concat    [$1, $3]; }
    | static_scalar '+' static_scalar                       { $$ = Expr\BinaryOp\Plus      [$1, $3]; }
    | static_scalar '-' static_scalar                       { $$ = Expr\BinaryOp\Minus     [$1, $3]; }
    | static_scalar '*' static_scalar                       { $$ = Expr\BinaryOp\Mul       [$1, $3]; }
    | static_scalar '/' static_scalar                       { $$ = Expr\BinaryOp\Div       [$1, $3]; }
    | static_scalar '%' static_scalar                       { $$ = Expr\BinaryOp\Mod       [$1, $3]; }
    | static_scalar T_SL static_scalar                      { $$ = Expr\BinaryOp\ShiftLeft [$1, $3]; }
    | static_scalar T_SR static_scalar                      { $$ = Expr\BinaryOp\ShiftRight[$1, $3]; }
    | static_scalar T_POW static_scalar                     { $$ = Expr\BinaryOp\Pow       [$1, $3]; }
    | '+' static_scalar %prec T_INC                         { $$ = Expr\UnaryPlus [$2]; }
    | '-' static_scalar %prec T_INC                         { $$ = Expr\UnaryMinus[$2]; }
    | '!' static_scalar                                     { $$ = Expr\BooleanNot[$2]; }
    | '~' static_scalar                                     { $$ = Expr\BitwiseNot[$2]; }
    | static_scalar T_IS_IDENTICAL static_scalar            { $$ = Expr\BinaryOp\Identical     [$1, $3]; }
    | static_scalar T_IS_NOT_IDENTICAL static_scalar        { $$ = Expr\BinaryOp\NotIdentical  [$1, $3]; }
    | static_scalar T_IS_EQUAL static_scalar                { $$ = Expr\BinaryOp\Equal         [$1, $3]; }
    | static_scalar T_IS_NOT_EQUAL static_scalar            { $$ = Expr\BinaryOp\NotEqual      [$1, $3]; }
    | static_scalar '<' static_scalar                       { $$ = Expr\BinaryOp\Smaller       [$1, $3]; }
    | static_scalar T_IS_SMALLER_OR_EQUAL static_scalar     { $$ = Expr\BinaryOp\SmallerOrEqual[$1, $3]; }
    | static_scalar '>' static_scalar                       { $$ = Expr\BinaryOp\Greater       [$1, $3]; }
    | static_scalar T_IS_GREATER_OR_EQUAL static_scalar     { $$ = Expr\BinaryOp\GreaterOrEqual[$1, $3]; }
    | static_scalar '?' static_scalar ':' static_scalar     { $$ = Expr\Ternary[$1, $3,   $5]; }
    | static_scalar '?' ':' static_scalar                   { $$ = Expr\Ternary[$1, null, $4]; }
    | static_scalar '[' static_scalar ']'                   { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | '(' static_scalar ')'                                 { $$ = $2; }
;

constant:
      name                                                  { $$ = Expr\ConstFetch[$1]; }
    | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM identifier_ex
          { $$ = Expr\ClassConstFetch[$1, $3]; }
;

scalar:
      common_scalar                                         { $$ = $1; }
    | constant                                              { $$ = $1; }
    | '"' encaps_list '"'
          { $attrs = attributes(); $attrs['kind'] = Scalar\String_::KIND_DOUBLE_QUOTED;
            parseEncapsed($2, '"', true); $$ = new Scalar\Encapsed($2, $attrs); }
    | T_START_HEREDOC encaps_list T_END_HEREDOC
          { $$ = $this->parseDocString($1, $2, $3, attributes(), stackAttributes(#3), true); }
;

static_array_pair_list:
      /* empty */                                           { $$ = array(); }
    | non_empty_static_array_pair_list optional_comma       { $$ = $1; }
;

optional_comma:
      /* empty */
    | ','
;

non_empty_static_array_pair_list:
      non_empty_static_array_pair_list ',' static_array_pair { push($1, $3); }
    | static_array_pair                                      { init($1); }
;

static_array_pair:
      static_scalar T_DOUBLE_ARROW static_scalar            { $$ = Expr\ArrayItem[$3, $1,   false]; }
    | static_scalar                                         { $$ = Expr\ArrayItem[$1, null, false]; }
;

variable:
      object_access                                         { $$ = $1; }
    | base_variable                                         { $$ = $1; }
    | function_call                                         { $$ = $1; }
    | new_expr_array_deref                                  { $$ = $1; }
;

new_expr_array_deref:
      '(' new_expr ')' '[' dim_offset ']'                   { $$ = Expr\ArrayDimFetch[$2, $5]; }
    | new_expr_array_deref '[' dim_offset ']'               { $$ = Expr\ArrayDimFetch[$1, $3]; }
      /* alternative array syntax missing intentionally */
;

object_access:
      variable_or_new_expr T_OBJECT_OPERATOR object_property
          { $$ = Expr\PropertyFetch[$1, $3]; }
    | variable_or_new_expr T_OBJECT_OPERATOR object_property argument_list
          { $$ = Expr\MethodCall[$1, $3, $4]; }
    | object_access argument_list                           { $$ = Expr\FuncCall[$1, $2]; }
    | object_access '[' dim_offset ']'                      { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | object_access '{' expr '}'                            { $$ = Expr\ArrayDimFetch[$1, $3]; }
;

variable_or_new_expr:
      variable                                              { $$ = $1; }
    | '(' new_expr ')'                                      { $$ = $2; }
;

variable_without_objects:
      reference_variable                                    { $$ = $1; }
    | '$' variable_without_objects                          { $$ = Expr\Variable[$2]; }
;

base_variable:
      variable_without_objects                              { $$ = $1; }
    | static_property                                       { $$ = $1; }
;

static_property:
      class_name_or_var T_PAAMAYIM_NEKUDOTAYIM '$' reference_variable
          { $$ = Expr\StaticPropertyFetch[$1, $4]; }
    | static_property_with_arrays                           { $$ = $1; }
;

static_property_simple_name:
      T_VARIABLE
          { $var = parseVar($1); $$ = \is_string($var) ? Node\VarLikeIdentifier[$var] : $var; }
;

static_property_with_arrays:
      class_name_or_var T_PAAMAYIM_NEKUDOTAYIM static_property_simple_name
          { $$ = Expr\StaticPropertyFetch[$1, $3]; }
    | class_name_or_var T_PAAMAYIM_NEKUDOTAYIM '$' '{' expr '}'
          { $$ = Expr\StaticPropertyFetch[$1, $5]; }
    | static_property_with_arrays '[' dim_offset ']'        { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | static_property_with_arrays '{' expr '}'              { $$ = Expr\ArrayDimFetch[$1, $3]; }
;

reference_variable:
      reference_variable '[' dim_offset ']'                 { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | reference_variable '{' expr '}'                       { $$ = Expr\ArrayDimFetch[$1, $3]; }
    | plain_variable                                        { $$ = $1; }
    | '$' '{' expr '}'                                      { $$ = Expr\Variable[$3]; }
;

dim_offset:
      /* empty */                                           { $$ = null; }
    | expr                                                  { $$ = $1; }
;

object_property:
      identifier                                            { $$ = $1; }
    | '{' expr '}'                                          { $$ = $2; }
    | variable_without_objects                              { $$ = $1; }
    | error                                                 { $$ = Expr\Error[]; $this->errorState = 2; }
;

list_expr:
      T_LIST '(' list_expr_elements ')'                     { $$ = Expr\List_[$3]; }
;

list_expr_elements:
      list_expr_elements ',' list_expr_element              { push($1, $3); }
    | list_expr_element                                     { init($1); }
;

list_expr_element:
      variable                                              { $$ = Expr\ArrayItem[$1, null, false]; }
    | list_expr                                             { $$ = Expr\ArrayItem[$1, null, false]; }
    | /* empty */                                           { $$ = null; }
;

array_pair_list:
      /* empty */                                           { $$ = array(); }
    | non_empty_array_pair_list optional_comma              { $$ = $1; }
;

non_empty_array_pair_list:
      non_empty_array_pair_list ',' array_pair              { push($1, $3); }
    | array_pair                                            { init($1); }
;

array_pair:
      expr T_DOUBLE_ARROW expr                              { $$ = Expr\ArrayItem[$3, $1,   false]; }
    | expr                                                  { $$ = Expr\ArrayItem[$1, null, false]; }
    | expr T_DOUBLE_ARROW ampersand variable                { $$ = Expr\ArrayItem[$4, $1,   true]; }
    | ampersand variable                                    { $$ = Expr\ArrayItem[$2, null, true]; }
    | T_ELLIPSIS expr                                       { $$ = new Expr\ArrayItem($2, null, false, attributes(), true); }
;

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           { $$ = Expr\PropertyFetch[$1, $3]; }
    | T_DOLLAR_OPEN_CURLY_BRACES expr '}'                   { $$ = 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()); }
    | plain_variable                                        { $$ = $1; }
;

%%
Name	Size	Permission
README.md	1417 bytes	0644
parser.template	2321 bytes	0644
php5.y	51399 bytes	0644
php7.y	58065 bytes	0644
phpyLang.php	5998 bytes	0644
rebuildParsers.php	2229 bytes	0644
tokens.template	298 bytes	0644
tokens.y	2689 bytes	0644
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