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zend_language_parser.y
1773 lines (1554 loc) · 60.9 KB
/
zend_language_parser.y
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%require "3.0"
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Nikita Popov <nikic@php.net> |
+----------------------------------------------------------------------+
*/
%code top {
#include "zend.h"
#include "zend_list.h"
#include "zend_globals.h"
#include "zend_API.h"
#include "zend_constants.h"
#include "zend_language_scanner.h"
#include "zend_exceptions.h"
#define YYSIZE_T size_t
#define yytnamerr zend_yytnamerr
static YYSIZE_T zend_yytnamerr(char*, const char*);
#ifdef _MSC_VER
#define YYMALLOC malloc
#define YYFREE free
#endif
}
%code requires {
#include "zend_compile.h"
}
%define api.prefix {zend}
%define api.pure full
%define api.value.type {zend_parser_stack_elem}
%define parse.error verbose
%expect 0
%destructor { zend_ast_destroy($$); } <ast>
%destructor { if ($$) zend_string_release_ex($$, 0); } <str>
%precedence T_THROW
%precedence PREC_ARROW_FUNCTION
%precedence T_INCLUDE T_INCLUDE_ONCE T_REQUIRE T_REQUIRE_ONCE
%left T_LOGICAL_OR
%left T_LOGICAL_XOR
%left T_LOGICAL_AND
%precedence T_PRINT
%precedence T_YIELD
%precedence T_DOUBLE_ARROW
%precedence T_YIELD_FROM
%precedence '=' T_PLUS_EQUAL T_MINUS_EQUAL T_MUL_EQUAL T_DIV_EQUAL T_CONCAT_EQUAL T_MOD_EQUAL T_AND_EQUAL T_OR_EQUAL T_XOR_EQUAL T_SL_EQUAL T_SR_EQUAL T_POW_EQUAL T_COALESCE_EQUAL
%left '?' ':'
%right T_COALESCE
%left T_BOOLEAN_OR
%left T_BOOLEAN_AND
%left '|'
%left '^'
%left T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG
%nonassoc T_IS_EQUAL T_IS_NOT_EQUAL T_IS_IDENTICAL T_IS_NOT_IDENTICAL T_SPACESHIP
%nonassoc '<' T_IS_SMALLER_OR_EQUAL '>' T_IS_GREATER_OR_EQUAL
%left '.'
%left T_SL T_SR
%left '+' '-'
%left '*' '/' '%'
%precedence '!'
%precedence T_INSTANCEOF
%precedence '~' T_INT_CAST T_DOUBLE_CAST T_STRING_CAST T_ARRAY_CAST T_OBJECT_CAST T_BOOL_CAST T_UNSET_CAST '@'
%right T_POW
%precedence T_CLONE
/* Resolve danging else conflict */
%precedence T_NOELSE
%precedence T_ELSEIF
%precedence T_ELSE
%token <ast> T_LNUMBER "integer"
%token <ast> T_DNUMBER "floating-point number"
%token <ast> T_STRING "identifier"
%token <ast> T_NAME_FULLY_QUALIFIED "fully qualified name"
%token <ast> T_NAME_RELATIVE "namespace-relative name"
%token <ast> T_NAME_QUALIFIED "namespaced name"
%token <ast> T_VARIABLE "variable"
%token <ast> T_INLINE_HTML
%token <ast> T_ENCAPSED_AND_WHITESPACE "string content"
%token <ast> T_CONSTANT_ENCAPSED_STRING "quoted string"
%token <ast> T_STRING_VARNAME "variable name"
%token <ast> T_NUM_STRING "number"
%token <ident> T_INCLUDE "'include'"
%token <ident> T_INCLUDE_ONCE "'include_once'"
%token <ident> T_EVAL "'eval'"
%token <ident> T_REQUIRE "'require'"
%token <ident> T_REQUIRE_ONCE "'require_once'"
%token <ident> T_LOGICAL_OR "'or'"
%token <ident> T_LOGICAL_XOR "'xor'"
%token <ident> T_LOGICAL_AND "'and'"
%token <ident> T_PRINT "'print'"
%token <ident> T_YIELD "'yield'"
%token <ident> T_YIELD_FROM "'yield from'"
%token <ident> T_INSTANCEOF "'instanceof'"
%token <ident> T_NEW "'new'"
%token <ident> T_CLONE "'clone'"
%token <ident> T_EXIT "'exit'"
%token <ident> T_IF "'if'"
%token <ident> T_ELSEIF "'elseif'"
%token <ident> T_ELSE "'else'"
%token <ident> T_ENDIF "'endif'"
%token <ident> T_ECHO "'echo'"
%token <ident> T_DO "'do'"
%token <ident> T_WHILE "'while'"
%token <ident> T_ENDWHILE "'endwhile'"
%token <ident> T_FOR "'for'"
%token <ident> T_ENDFOR "'endfor'"
%token <ident> T_FOREACH "'foreach'"
%token <ident> T_ENDFOREACH "'endforeach'"
%token <ident> T_DECLARE "'declare'"
%token <ident> T_ENDDECLARE "'enddeclare'"
%token <ident> T_AS "'as'"
%token <ident> T_SWITCH "'switch'"
%token <ident> T_ENDSWITCH "'endswitch'"
%token <ident> T_CASE "'case'"
%token <ident> T_DEFAULT "'default'"
%token <ident> T_MATCH "'match'"
%token <ident> T_BREAK "'break'"
%token <ident> T_CONTINUE "'continue'"
%token <ident> T_GOTO "'goto'"
%token <ident> T_FUNCTION "'function'"
%token <ident> T_FN "'fn'"
%token <ident> T_CONST "'const'"
%token <ident> T_RETURN "'return'"
%token <ident> T_TRY "'try'"
%token <ident> T_CATCH "'catch'"
%token <ident> T_FINALLY "'finally'"
%token <ident> T_THROW "'throw'"
%token <ident> T_USE "'use'"
%token <ident> T_INSTEADOF "'insteadof'"
%token <ident> T_GLOBAL "'global'"
%token <ident> T_STATIC "'static'"
%token <ident> T_ABSTRACT "'abstract'"
%token <ident> T_FINAL "'final'"
%token <ident> T_PRIVATE "'private'"
%token <ident> T_PROTECTED "'protected'"
%token <ident> T_PUBLIC "'public'"
%token <ident> T_READONLY "'readonly'"
%token <ident> T_VAR "'var'"
%token <ident> T_UNSET "'unset'"
%token <ident> T_ISSET "'isset'"
%token <ident> T_EMPTY "'empty'"
%token <ident> T_HALT_COMPILER "'__halt_compiler'"
%token <ident> T_CLASS "'class'"
%token <ident> T_TRAIT "'trait'"
%token <ident> T_INTERFACE "'interface'"
%token <ident> T_ENUM "'enum'"
%token <ident> T_EXTENDS "'extends'"
%token <ident> T_IMPLEMENTS "'implements'"
%token <ident> T_NAMESPACE "'namespace'"
%token <ident> T_LIST "'list'"
%token <ident> T_ARRAY "'array'"
%token <ident> T_CALLABLE "'callable'"
%token <ident> T_LINE "'__LINE__'"
%token <ident> T_FILE "'__FILE__'"
%token <ident> T_DIR "'__DIR__'"
%token <ident> T_CLASS_C "'__CLASS__'"
%token <ident> T_TRAIT_C "'__TRAIT__'"
%token <ident> T_METHOD_C "'__METHOD__'"
%token <ident> T_FUNC_C "'__FUNCTION__'"
%token <ident> T_NS_C "'__NAMESPACE__'"
%token END 0 "end of file"
%token T_ATTRIBUTE "'#['"
%token T_PLUS_EQUAL "'+='"
%token T_MINUS_EQUAL "'-='"
%token T_MUL_EQUAL "'*='"
%token T_DIV_EQUAL "'/='"
%token T_CONCAT_EQUAL "'.='"
%token T_MOD_EQUAL "'%='"
%token T_AND_EQUAL "'&='"
%token T_OR_EQUAL "'|='"
%token T_XOR_EQUAL "'^='"
%token T_SL_EQUAL "'<<='"
%token T_SR_EQUAL "'>>='"
%token T_COALESCE_EQUAL "'??='"
%token T_BOOLEAN_OR "'||'"
%token T_BOOLEAN_AND "'&&'"
%token T_IS_EQUAL "'=='"
%token T_IS_NOT_EQUAL "'!='"
%token T_IS_IDENTICAL "'==='"
%token T_IS_NOT_IDENTICAL "'!=='"
%token T_IS_SMALLER_OR_EQUAL "'<='"
%token T_IS_GREATER_OR_EQUAL "'>='"
%token T_SPACESHIP "'<=>'"
%token T_SL "'<<'"
%token T_SR "'>>'"
%token T_INC "'++'"
%token T_DEC "'--'"
%token T_INT_CAST "'(int)'"
%token T_DOUBLE_CAST "'(double)'"
%token T_STRING_CAST "'(string)'"
%token T_ARRAY_CAST "'(array)'"
%token T_OBJECT_CAST "'(object)'"
%token T_BOOL_CAST "'(bool)'"
%token T_UNSET_CAST "'(unset)'"
%token T_OBJECT_OPERATOR "'->'"
%token T_NULLSAFE_OBJECT_OPERATOR "'?->'"
%token T_DOUBLE_ARROW "'=>'"
%token T_COMMENT "comment"
%token T_DOC_COMMENT "doc comment"
%token T_OPEN_TAG "open tag"
%token T_OPEN_TAG_WITH_ECHO "'<?='"
%token T_CLOSE_TAG "'?>'"
%token T_WHITESPACE "whitespace"
%token T_START_HEREDOC "heredoc start"
%token T_END_HEREDOC "heredoc end"
%token T_DOLLAR_OPEN_CURLY_BRACES "'${'"
%token T_CURLY_OPEN "'{$'"
%token T_PAAMAYIM_NEKUDOTAYIM "'::'"
%token T_NS_SEPARATOR "'\\'"
%token T_ELLIPSIS "'...'"
%token T_COALESCE "'??'"
%token T_POW "'**'"
%token T_POW_EQUAL "'**='"
/* We need to split the & token in two to avoid a shift/reduce conflict. For T1&$v and T1&T2,
* with only one token lookahead, bison does not know whether to reduce T1 as a complete type,
* or shift to continue parsing an intersection type. */
%token T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG "'&'"
/* Bison warns on duplicate token literals, so use a different dummy value here.
* It will be fixed up by zend_yytnamerr() later. */
%token T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG "amp"
%token T_BAD_CHARACTER "invalid character"
/* Token used to force a parse error from the lexer */
%token T_ERROR
%type <ast> top_statement namespace_name name statement function_declaration_statement
%type <ast> class_declaration_statement trait_declaration_statement legacy_namespace_name
%type <ast> interface_declaration_statement interface_extends_list
%type <ast> group_use_declaration inline_use_declarations inline_use_declaration
%type <ast> mixed_group_use_declaration use_declaration unprefixed_use_declaration
%type <ast> unprefixed_use_declarations const_decl inner_statement
%type <ast> expr optional_expr while_statement for_statement foreach_variable
%type <ast> foreach_statement declare_statement finally_statement unset_variable variable
%type <ast> extends_from parameter optional_type_without_static argument global_var
%type <ast> static_var class_statement trait_adaptation trait_precedence trait_alias
%type <ast> absolute_trait_method_reference trait_method_reference property echo_expr
%type <ast> new_expr anonymous_class class_name class_name_reference simple_variable
%type <ast> internal_functions_in_yacc
%type <ast> exit_expr scalar backticks_expr lexical_var function_call member_name property_name
%type <ast> variable_class_name dereferenceable_scalar constant class_constant
%type <ast> fully_dereferenceable array_object_dereferenceable
%type <ast> callable_expr callable_variable static_member new_variable
%type <ast> encaps_var encaps_var_offset isset_variables
%type <ast> top_statement_list use_declarations const_list inner_statement_list if_stmt
%type <ast> alt_if_stmt for_exprs switch_case_list global_var_list static_var_list
%type <ast> echo_expr_list unset_variables catch_name_list catch_list optional_variable parameter_list class_statement_list
%type <ast> implements_list case_list if_stmt_without_else
%type <ast> non_empty_parameter_list argument_list non_empty_argument_list property_list
%type <ast> class_const_list class_const_decl class_name_list trait_adaptations method_body non_empty_for_exprs
%type <ast> ctor_arguments alt_if_stmt_without_else trait_adaptation_list lexical_vars
%type <ast> lexical_var_list encaps_list
%type <ast> array_pair non_empty_array_pair_list array_pair_list possible_array_pair
%type <ast> isset_variable type return_type type_expr type_without_static
%type <ast> identifier type_expr_without_static union_type_without_static_element union_type_without_static intersection_type_without_static
%type <ast> inline_function union_type_element union_type intersection_type
%type <ast> attributed_statement attributed_class_statement attributed_parameter
%type <ast> attribute_decl attribute attributes attribute_group namespace_declaration_name
%type <ast> match match_arm_list non_empty_match_arm_list match_arm match_arm_cond_list
%type <ast> enum_declaration_statement enum_backing_type enum_case enum_case_expr
%type <ast> function_name non_empty_member_modifiers
%type <num> returns_ref function fn is_reference is_variadic property_modifiers
%type <num> method_modifiers class_const_modifiers member_modifier optional_cpp_modifiers
%type <num> class_modifiers class_modifier anonymous_class_modifiers anonymous_class_modifiers_optional use_type backup_fn_flags
%type <ptr> backup_lex_pos
%type <str> backup_doc_comment
%type <ident> reserved_non_modifiers semi_reserved
%% /* Rules */
start:
top_statement_list { CG(ast) = $1; (void) zendnerrs; }
;
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_FN | T_MATCH | T_ENUM
;
semi_reserved:
reserved_non_modifiers
| T_STATIC | T_ABSTRACT | T_FINAL | T_PRIVATE | T_PROTECTED | T_PUBLIC | T_READONLY
;
ampersand:
T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG
| T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG
;
identifier:
T_STRING { $$ = $1; }
| semi_reserved {
zval zv;
if (zend_lex_tstring(&zv, $1) == FAILURE) { YYABORT; }
$$ = zend_ast_create_zval(&zv);
}
;
top_statement_list:
top_statement_list top_statement { $$ = zend_ast_list_add($1, $2); }
| %empty { $$ = zend_ast_create_list(0, ZEND_AST_STMT_LIST); }
;
/* Name usable in a namespace declaration. */
namespace_declaration_name:
identifier { $$ = $1; }
| T_NAME_QUALIFIED { $$ = $1; }
;
/* Name usable in "use" declarations (leading separator forbidden). */
namespace_name:
T_STRING { $$ = $1; }
| T_NAME_QUALIFIED { $$ = $1; }
;
/* Name usable in "use" declarations (leading separator allowed). */
legacy_namespace_name:
namespace_name { $$ = $1; }
| T_NAME_FULLY_QUALIFIED { $$ = $1; }
;
name:
T_STRING { $$ = $1; $$->attr = ZEND_NAME_NOT_FQ; }
| T_NAME_QUALIFIED { $$ = $1; $$->attr = ZEND_NAME_NOT_FQ; }
| T_NAME_FULLY_QUALIFIED { $$ = $1; $$->attr = ZEND_NAME_FQ; }
| T_NAME_RELATIVE { $$ = $1; $$->attr = ZEND_NAME_RELATIVE; }
;
attribute_decl:
class_name
{ $$ = zend_ast_create(ZEND_AST_ATTRIBUTE, $1, NULL); }
| class_name argument_list
{ $$ = zend_ast_create(ZEND_AST_ATTRIBUTE, $1, $2); }
;
attribute_group:
attribute_decl
{ $$ = zend_ast_create_list(1, ZEND_AST_ATTRIBUTE_GROUP, $1); }
| attribute_group ',' attribute_decl
{ $$ = zend_ast_list_add($1, $3); }
;
attribute:
T_ATTRIBUTE attribute_group possible_comma ']' { $$ = $2; }
;
attributes:
attribute { $$ = zend_ast_create_list(1, ZEND_AST_ATTRIBUTE_LIST, $1); }
| attributes attribute { $$ = zend_ast_list_add($1, $2); }
;
attributed_statement:
function_declaration_statement { $$ = $1; }
| class_declaration_statement { $$ = $1; }
| trait_declaration_statement { $$ = $1; }
| interface_declaration_statement { $$ = $1; }
| enum_declaration_statement { $$ = $1; }
;
top_statement:
statement { $$ = $1; }
| attributed_statement { $$ = $1; }
| attributes attributed_statement { $$ = zend_ast_with_attributes($2, $1); }
| T_HALT_COMPILER '(' ')' ';'
{ $$ = zend_ast_create(ZEND_AST_HALT_COMPILER,
zend_ast_create_zval_from_long(zend_get_scanned_file_offset()));
zend_stop_lexing(); }
| T_NAMESPACE namespace_declaration_name ';'
{ $$ = zend_ast_create(ZEND_AST_NAMESPACE, $2, NULL);
RESET_DOC_COMMENT(); }
| T_NAMESPACE namespace_declaration_name { RESET_DOC_COMMENT(); }
'{' top_statement_list '}'
{ $$ = zend_ast_create(ZEND_AST_NAMESPACE, $2, $5); }
| T_NAMESPACE { RESET_DOC_COMMENT(); }
'{' top_statement_list '}'
{ $$ = zend_ast_create(ZEND_AST_NAMESPACE, NULL, $4); }
| T_USE mixed_group_use_declaration ';' { $$ = $2; }
| T_USE use_type group_use_declaration ';' { $$ = $3; $$->attr = $2; }
| T_USE use_declarations ';' { $$ = $2; $$->attr = ZEND_SYMBOL_CLASS; }
| T_USE use_type use_declarations ';' { $$ = $3; $$->attr = $2; }
| T_CONST const_list ';' { $$ = $2; }
;
use_type:
T_FUNCTION { $$ = ZEND_SYMBOL_FUNCTION; }
| T_CONST { $$ = ZEND_SYMBOL_CONST; }
;
group_use_declaration:
legacy_namespace_name T_NS_SEPARATOR '{' unprefixed_use_declarations possible_comma '}'
{ $$ = zend_ast_create(ZEND_AST_GROUP_USE, $1, $4); }
;
mixed_group_use_declaration:
legacy_namespace_name T_NS_SEPARATOR '{' inline_use_declarations possible_comma '}'
{ $$ = zend_ast_create(ZEND_AST_GROUP_USE, $1, $4);}
;
possible_comma:
%empty
| ','
;
inline_use_declarations:
inline_use_declarations ',' inline_use_declaration
{ $$ = zend_ast_list_add($1, $3); }
| inline_use_declaration
{ $$ = zend_ast_create_list(1, ZEND_AST_USE, $1); }
;
unprefixed_use_declarations:
unprefixed_use_declarations ',' unprefixed_use_declaration
{ $$ = zend_ast_list_add($1, $3); }
| unprefixed_use_declaration
{ $$ = zend_ast_create_list(1, ZEND_AST_USE, $1); }
;
use_declarations:
use_declarations ',' use_declaration
{ $$ = zend_ast_list_add($1, $3); }
| use_declaration
{ $$ = zend_ast_create_list(1, ZEND_AST_USE, $1); }
;
inline_use_declaration:
unprefixed_use_declaration { $$ = $1; $$->attr = ZEND_SYMBOL_CLASS; }
| use_type unprefixed_use_declaration { $$ = $2; $$->attr = $1; }
;
unprefixed_use_declaration:
namespace_name
{ $$ = zend_ast_create(ZEND_AST_USE_ELEM, $1, NULL); }
| namespace_name T_AS T_STRING
{ $$ = zend_ast_create(ZEND_AST_USE_ELEM, $1, $3); }
;
use_declaration:
legacy_namespace_name
{ $$ = zend_ast_create(ZEND_AST_USE_ELEM, $1, NULL); }
| legacy_namespace_name T_AS T_STRING
{ $$ = zend_ast_create(ZEND_AST_USE_ELEM, $1, $3); }
;
const_list:
const_list ',' const_decl { $$ = zend_ast_list_add($1, $3); }
| const_decl { $$ = zend_ast_create_list(1, ZEND_AST_CONST_DECL, $1); }
;
inner_statement_list:
inner_statement_list inner_statement
{ $$ = zend_ast_list_add($1, $2); }
| %empty
{ $$ = zend_ast_create_list(0, ZEND_AST_STMT_LIST); }
;
inner_statement:
statement { $$ = $1; }
| attributed_statement { $$ = $1; }
| attributes attributed_statement { $$ = zend_ast_with_attributes($2, $1); }
| T_HALT_COMPILER '(' ')' ';'
{ $$ = NULL; zend_throw_exception(zend_ce_compile_error,
"__HALT_COMPILER() can only be used from the outermost scope", 0); YYERROR; }
;
statement:
'{' inner_statement_list '}' { $$ = $2; }
| if_stmt { $$ = $1; }
| alt_if_stmt { $$ = $1; }
| T_WHILE '(' expr ')' while_statement
{ $$ = zend_ast_create(ZEND_AST_WHILE, $3, $5); }
| T_DO statement T_WHILE '(' expr ')' ';'
{ $$ = zend_ast_create(ZEND_AST_DO_WHILE, $2, $5); }
| T_FOR '(' for_exprs ';' for_exprs ';' for_exprs ')' for_statement
{ $$ = zend_ast_create(ZEND_AST_FOR, $3, $5, $7, $9); }
| T_SWITCH '(' expr ')' switch_case_list
{ $$ = zend_ast_create(ZEND_AST_SWITCH, $3, $5); }
| T_BREAK optional_expr ';' { $$ = zend_ast_create(ZEND_AST_BREAK, $2); }
| T_CONTINUE optional_expr ';' { $$ = zend_ast_create(ZEND_AST_CONTINUE, $2); }
| T_RETURN optional_expr ';' { $$ = zend_ast_create(ZEND_AST_RETURN, $2); }
| T_GLOBAL global_var_list ';' { $$ = $2; }
| T_STATIC static_var_list ';' { $$ = $2; }
| T_ECHO echo_expr_list ';' { $$ = $2; }
| T_INLINE_HTML { $$ = zend_ast_create(ZEND_AST_ECHO, $1); }
| expr ';' { $$ = $1; }
| T_UNSET '(' unset_variables possible_comma ')' ';' { $$ = $3; }
| T_FOREACH '(' expr T_AS foreach_variable ')' foreach_statement
{ $$ = zend_ast_create(ZEND_AST_FOREACH, $3, $5, NULL, $7); }
| T_FOREACH '(' expr T_AS foreach_variable T_DOUBLE_ARROW foreach_variable ')'
foreach_statement
{ $$ = zend_ast_create(ZEND_AST_FOREACH, $3, $7, $5, $9); }
| T_DECLARE '(' const_list ')'
{ if (!zend_handle_encoding_declaration($3)) { YYERROR; } }
declare_statement
{ $$ = zend_ast_create(ZEND_AST_DECLARE, $3, $6); }
| ';' /* empty statement */ { $$ = NULL; }
| T_TRY '{' inner_statement_list '}' catch_list finally_statement
{ $$ = zend_ast_create(ZEND_AST_TRY, $3, $5, $6); }
| T_GOTO T_STRING ';' { $$ = zend_ast_create(ZEND_AST_GOTO, $2); }
| T_STRING ':' { $$ = zend_ast_create(ZEND_AST_LABEL, $1); }
;
catch_list:
%empty
{ $$ = zend_ast_create_list(0, ZEND_AST_CATCH_LIST); }
| catch_list T_CATCH '(' catch_name_list optional_variable ')' '{' inner_statement_list '}'
{ $$ = zend_ast_list_add($1, zend_ast_create(ZEND_AST_CATCH, $4, $5, $8)); }
;
catch_name_list:
class_name { $$ = zend_ast_create_list(1, ZEND_AST_NAME_LIST, $1); }
| catch_name_list '|' class_name { $$ = zend_ast_list_add($1, $3); }
;
optional_variable:
%empty { $$ = NULL; }
| T_VARIABLE { $$ = $1; }
;
finally_statement:
%empty { $$ = NULL; }
| T_FINALLY '{' inner_statement_list '}' { $$ = $3; }
;
unset_variables:
unset_variable { $$ = zend_ast_create_list(1, ZEND_AST_STMT_LIST, $1); }
| unset_variables ',' unset_variable { $$ = zend_ast_list_add($1, $3); }
;
unset_variable:
variable { $$ = zend_ast_create(ZEND_AST_UNSET, $1); }
;
function_name:
T_STRING { $$ = $1; }
| T_READONLY {
zval zv;
if (zend_lex_tstring(&zv, $1) == FAILURE) { YYABORT; }
$$ = zend_ast_create_zval(&zv);
}
;
function_declaration_statement:
function returns_ref function_name backup_doc_comment '(' parameter_list ')' return_type
backup_fn_flags '{' inner_statement_list '}' backup_fn_flags
{ $$ = zend_ast_create_decl(ZEND_AST_FUNC_DECL, $2 | $13, $1, $4,
zend_ast_get_str($3), $6, NULL, $11, $8, NULL); CG(extra_fn_flags) = $9; }
;
is_reference:
%empty { $$ = 0; }
| T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG { $$ = ZEND_PARAM_REF; }
;
is_variadic:
%empty { $$ = 0; }
| T_ELLIPSIS { $$ = ZEND_PARAM_VARIADIC; }
;
class_declaration_statement:
class_modifiers T_CLASS { $<num>$ = CG(zend_lineno); }
T_STRING extends_from implements_list backup_doc_comment '{' class_statement_list '}'
{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, $1, $<num>3, $7, zend_ast_get_str($4), $5, $6, $9, NULL, NULL); }
| T_CLASS { $<num>$ = CG(zend_lineno); }
T_STRING extends_from implements_list backup_doc_comment '{' class_statement_list '}'
{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, 0, $<num>2, $6, zend_ast_get_str($3), $4, $5, $8, NULL, NULL); }
;
class_modifiers:
class_modifier { $$ = $1; }
| class_modifiers class_modifier
{ $$ = zend_add_class_modifier($1, $2); if (!$$) { YYERROR; } }
;
anonymous_class_modifiers:
class_modifier
{ $$ = zend_add_anonymous_class_modifier(0, $1); if (!$$) { YYERROR; } }
| anonymous_class_modifiers class_modifier
{ $$ = zend_add_anonymous_class_modifier($1, $2); if (!$$) { YYERROR; } }
;
anonymous_class_modifiers_optional:
%empty { $$ = 0; }
| anonymous_class_modifiers { $$ = $1; }
;
class_modifier:
T_ABSTRACT { $$ = ZEND_ACC_EXPLICIT_ABSTRACT_CLASS; }
| T_FINAL { $$ = ZEND_ACC_FINAL; }
| T_READONLY { $$ = ZEND_ACC_READONLY_CLASS|ZEND_ACC_NO_DYNAMIC_PROPERTIES; }
;
trait_declaration_statement:
T_TRAIT { $<num>$ = CG(zend_lineno); }
T_STRING backup_doc_comment '{' class_statement_list '}'
{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, ZEND_ACC_TRAIT, $<num>2, $4, zend_ast_get_str($3), NULL, NULL, $6, NULL, NULL); }
;
interface_declaration_statement:
T_INTERFACE { $<num>$ = CG(zend_lineno); }
T_STRING interface_extends_list backup_doc_comment '{' class_statement_list '}'
{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, ZEND_ACC_INTERFACE, $<num>2, $5, zend_ast_get_str($3), NULL, $4, $7, NULL, NULL); }
;
enum_declaration_statement:
T_ENUM { $<num>$ = CG(zend_lineno); }
T_STRING enum_backing_type implements_list backup_doc_comment '{' class_statement_list '}'
{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, ZEND_ACC_ENUM|ZEND_ACC_FINAL, $<num>2, $6, zend_ast_get_str($3), NULL, $5, $8, NULL, $4); }
;
enum_backing_type:
%empty { $$ = NULL; }
| ':' type_expr { $$ = $2; }
;
enum_case:
T_CASE backup_doc_comment identifier enum_case_expr ';'
{ $$ = zend_ast_create(ZEND_AST_ENUM_CASE, $3, $4, ($2 ? zend_ast_create_zval_from_str($2) : NULL), NULL); }
;
enum_case_expr:
%empty { $$ = NULL; }
| '=' expr { $$ = $2; }
;
extends_from:
%empty { $$ = NULL; }
| T_EXTENDS class_name { $$ = $2; }
;
interface_extends_list:
%empty { $$ = NULL; }
| T_EXTENDS class_name_list { $$ = $2; }
;
implements_list:
%empty { $$ = NULL; }
| T_IMPLEMENTS class_name_list { $$ = $2; }
;
foreach_variable:
variable { $$ = $1; }
| ampersand variable { $$ = zend_ast_create(ZEND_AST_REF, $2); }
| T_LIST '(' array_pair_list ')' { $$ = $3; $$->attr = ZEND_ARRAY_SYNTAX_LIST; }
| '[' array_pair_list ']' { $$ = $2; $$->attr = ZEND_ARRAY_SYNTAX_SHORT; }
;
for_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDFOR ';' { $$ = $2; }
;
foreach_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDFOREACH ';' { $$ = $2; }
;
declare_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDDECLARE ';' { $$ = $2; }
;
switch_case_list:
'{' case_list '}' { $$ = $2; }
| '{' ';' case_list '}' { $$ = $3; }
| ':' case_list T_ENDSWITCH ';' { $$ = $2; }
| ':' ';' case_list T_ENDSWITCH ';' { $$ = $3; }
;
case_list:
%empty { $$ = zend_ast_create_list(0, ZEND_AST_SWITCH_LIST); }
| case_list T_CASE expr case_separator inner_statement_list
{ $$ = zend_ast_list_add($1, zend_ast_create(ZEND_AST_SWITCH_CASE, $3, $5)); }
| case_list T_DEFAULT case_separator inner_statement_list
{ $$ = zend_ast_list_add($1, zend_ast_create(ZEND_AST_SWITCH_CASE, NULL, $4)); }
;
case_separator:
':'
| ';'
;
match:
T_MATCH '(' expr ')' '{' match_arm_list '}'
{ $$ = zend_ast_create(ZEND_AST_MATCH, $3, $6); };
;
match_arm_list:
%empty { $$ = zend_ast_create_list(0, ZEND_AST_MATCH_ARM_LIST); }
| non_empty_match_arm_list possible_comma { $$ = $1; }
;
non_empty_match_arm_list:
match_arm { $$ = zend_ast_create_list(1, ZEND_AST_MATCH_ARM_LIST, $1); }
| non_empty_match_arm_list ',' match_arm { $$ = zend_ast_list_add($1, $3); }
;
match_arm:
match_arm_cond_list possible_comma T_DOUBLE_ARROW expr
{ $$ = zend_ast_create(ZEND_AST_MATCH_ARM, $1, $4); }
| T_DEFAULT possible_comma T_DOUBLE_ARROW expr
{ $$ = zend_ast_create(ZEND_AST_MATCH_ARM, NULL, $4); }
;
match_arm_cond_list:
expr { $$ = zend_ast_create_list(1, ZEND_AST_EXPR_LIST, $1); }
| match_arm_cond_list ',' expr { $$ = zend_ast_list_add($1, $3); }
;
while_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDWHILE ';' { $$ = $2; }
;
if_stmt_without_else:
T_IF '(' expr ')' statement
{ $$ = zend_ast_create_list(1, ZEND_AST_IF,
zend_ast_create(ZEND_AST_IF_ELEM, $3, $5)); }
| if_stmt_without_else T_ELSEIF '(' expr ')' statement
{ $$ = zend_ast_list_add($1,
zend_ast_create(ZEND_AST_IF_ELEM, $4, $6)); }
;
if_stmt:
if_stmt_without_else %prec T_NOELSE { $$ = $1; }
| if_stmt_without_else T_ELSE statement
{ $$ = zend_ast_list_add($1, zend_ast_create(ZEND_AST_IF_ELEM, NULL, $3)); }
;
alt_if_stmt_without_else:
T_IF '(' expr ')' ':' inner_statement_list
{ $$ = zend_ast_create_list(1, ZEND_AST_IF,
zend_ast_create(ZEND_AST_IF_ELEM, $3, $6)); }
| alt_if_stmt_without_else T_ELSEIF '(' expr ')' ':' inner_statement_list
{ $$ = zend_ast_list_add($1,
zend_ast_create(ZEND_AST_IF_ELEM, $4, $7)); }
;
alt_if_stmt:
alt_if_stmt_without_else T_ENDIF ';' { $$ = $1; }
| alt_if_stmt_without_else T_ELSE ':' inner_statement_list T_ENDIF ';'
{ $$ = zend_ast_list_add($1,
zend_ast_create(ZEND_AST_IF_ELEM, NULL, $4)); }
;
parameter_list:
non_empty_parameter_list possible_comma { $$ = $1; }
| %empty { $$ = zend_ast_create_list(0, ZEND_AST_PARAM_LIST); }
;
non_empty_parameter_list:
attributed_parameter
{ $$ = zend_ast_create_list(1, ZEND_AST_PARAM_LIST, $1); }
| non_empty_parameter_list ',' attributed_parameter
{ $$ = zend_ast_list_add($1, $3); }
;
attributed_parameter:
attributes parameter { $$ = zend_ast_with_attributes($2, $1); }
| parameter { $$ = $1; }
;
optional_cpp_modifiers:
%empty
{ $$ = 0; }
| non_empty_member_modifiers
{ $$ = zend_modifier_list_to_flags(ZEND_MODIFIER_TARGET_CPP, $1);
if (!$$) { YYERROR; } }
;
parameter:
optional_cpp_modifiers optional_type_without_static
is_reference is_variadic T_VARIABLE backup_doc_comment
{ $$ = zend_ast_create_ex(ZEND_AST_PARAM, $1 | $3 | $4, $2, $5, NULL,
NULL, $6 ? zend_ast_create_zval_from_str($6) : NULL); }
| optional_cpp_modifiers optional_type_without_static
is_reference is_variadic T_VARIABLE backup_doc_comment '=' expr
{ $$ = zend_ast_create_ex(ZEND_AST_PARAM, $1 | $3 | $4, $2, $5, $8,
NULL, $6 ? zend_ast_create_zval_from_str($6) : NULL); }
;
optional_type_without_static:
%empty { $$ = NULL; }
| type_expr_without_static { $$ = $1; }
;
type_expr:
type { $$ = $1; }
| '?' type { $$ = $2; $$->attr |= ZEND_TYPE_NULLABLE; }
| union_type { $$ = $1; }
| intersection_type { $$ = $1; }
;
type:
type_without_static { $$ = $1; }
| T_STATIC { $$ = zend_ast_create_ex(ZEND_AST_TYPE, IS_STATIC); }
;
union_type_element:
type { $$ = $1; }
| '(' intersection_type ')' { $$ = $2; }
;
union_type:
union_type_element '|' union_type_element
{ $$ = zend_ast_create_list(2, ZEND_AST_TYPE_UNION, $1, $3); }
| union_type '|' union_type_element
{ $$ = zend_ast_list_add($1, $3); }
;
intersection_type:
type T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type { $$ = zend_ast_create_list(2, ZEND_AST_TYPE_INTERSECTION, $1, $3); }
| intersection_type T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type { $$ = zend_ast_list_add($1, $3); }
;
/* Duplicate the type rules without "static",
* to avoid conflicts with "static" modifier for properties. */
type_expr_without_static:
type_without_static { $$ = $1; }
| '?' type_without_static { $$ = $2; $$->attr |= ZEND_TYPE_NULLABLE; }
| union_type_without_static { $$ = $1; }
| intersection_type_without_static { $$ = $1; }
;
type_without_static:
T_ARRAY { $$ = zend_ast_create_ex(ZEND_AST_TYPE, IS_ARRAY); }
| T_CALLABLE { $$ = zend_ast_create_ex(ZEND_AST_TYPE, IS_CALLABLE); }
| name { $$ = $1; }
;
union_type_without_static_element:
type_without_static { $$ = $1; }
| '(' intersection_type_without_static ')' { $$ = $2; }
;
union_type_without_static:
union_type_without_static_element '|' union_type_without_static_element
{ $$ = zend_ast_create_list(2, ZEND_AST_TYPE_UNION, $1, $3); }
| union_type_without_static '|' union_type_without_static_element
{ $$ = zend_ast_list_add($1, $3); }
;
intersection_type_without_static:
type_without_static T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static
{ $$ = zend_ast_create_list(2, ZEND_AST_TYPE_INTERSECTION, $1, $3); }
| intersection_type_without_static T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG type_without_static
{ $$ = zend_ast_list_add($1, $3); }
;
return_type:
%empty { $$ = NULL; }
| ':' type_expr { $$ = $2; }
;
argument_list:
'(' ')' { $$ = zend_ast_create_list(0, ZEND_AST_ARG_LIST); }
| '(' non_empty_argument_list possible_comma ')' { $$ = $2; }
| '(' T_ELLIPSIS ')' { $$ = zend_ast_create(ZEND_AST_CALLABLE_CONVERT); }
;
non_empty_argument_list:
argument
{ $$ = zend_ast_create_list(1, ZEND_AST_ARG_LIST, $1); }
| non_empty_argument_list ',' argument
{ $$ = zend_ast_list_add($1, $3); }
;
argument:
expr { $$ = $1; }
| identifier ':' expr
{ $$ = zend_ast_create(ZEND_AST_NAMED_ARG, $1, $3); }
| T_ELLIPSIS expr { $$ = zend_ast_create(ZEND_AST_UNPACK, $2); }
;
global_var_list:
global_var_list ',' global_var { $$ = zend_ast_list_add($1, $3); }
| global_var { $$ = zend_ast_create_list(1, ZEND_AST_STMT_LIST, $1); }
;
global_var:
simple_variable
{ $$ = zend_ast_create(ZEND_AST_GLOBAL, zend_ast_create(ZEND_AST_VAR, $1)); }
;
static_var_list:
static_var_list ',' static_var { $$ = zend_ast_list_add($1, $3); }
| static_var { $$ = zend_ast_create_list(1, ZEND_AST_STMT_LIST, $1); }
;
static_var:
T_VARIABLE { $$ = zend_ast_create(ZEND_AST_STATIC, $1, NULL); }
| T_VARIABLE '=' expr { $$ = zend_ast_create(ZEND_AST_STATIC, $1, $3); }
;
class_statement_list:
class_statement_list class_statement
{ $$ = zend_ast_list_add($1, $2); }
| %empty
{ $$ = zend_ast_create_list(0, ZEND_AST_STMT_LIST); }
;
attributed_class_statement:
property_modifiers optional_type_without_static property_list ';'
{ $$ = zend_ast_create(ZEND_AST_PROP_GROUP, $2, $3, NULL);
$$->attr = $1; }
| class_const_modifiers T_CONST class_const_list ';'
{ $$ = zend_ast_create(ZEND_AST_CLASS_CONST_GROUP, $3, NULL, NULL);
$$->attr = $1; }
| class_const_modifiers T_CONST type_expr class_const_list ';'
{ $$ = zend_ast_create(ZEND_AST_CLASS_CONST_GROUP, $4, NULL, $3);
$$->attr = $1; }
| method_modifiers function returns_ref identifier backup_doc_comment '(' parameter_list ')'
return_type backup_fn_flags method_body backup_fn_flags
{ $$ = zend_ast_create_decl(ZEND_AST_METHOD, $3 | $1 | $12, $2, $5,
zend_ast_get_str($4), $7, NULL, $11, $9, NULL); CG(extra_fn_flags) = $10; }
| enum_case { $$ = $1; }
;
class_statement:
attributed_class_statement { $$ = $1; }
| attributes attributed_class_statement { $$ = zend_ast_with_attributes($2, $1); }
| T_USE class_name_list trait_adaptations
{ $$ = zend_ast_create(ZEND_AST_USE_TRAIT, $2, $3); }
;
class_name_list:
class_name { $$ = zend_ast_create_list(1, ZEND_AST_NAME_LIST, $1); }
| class_name_list ',' class_name { $$ = zend_ast_list_add($1, $3); }
;
trait_adaptations:
';' { $$ = NULL; }
| '{' '}' { $$ = NULL; }
| '{' trait_adaptation_list '}' { $$ = $2; }
;
trait_adaptation_list:
trait_adaptation
{ $$ = zend_ast_create_list(1, ZEND_AST_TRAIT_ADAPTATIONS, $1); }
| trait_adaptation_list trait_adaptation
{ $$ = zend_ast_list_add($1, $2); }
;
trait_adaptation:
trait_precedence ';' { $$ = $1; }
| trait_alias ';' { $$ = $1; }
;
trait_precedence:
absolute_trait_method_reference T_INSTEADOF class_name_list
{ $$ = zend_ast_create(ZEND_AST_TRAIT_PRECEDENCE, $1, $3); }
;
trait_alias:
trait_method_reference T_AS T_STRING
{ $$ = zend_ast_create(ZEND_AST_TRAIT_ALIAS, $1, $3); }
| trait_method_reference T_AS reserved_non_modifiers
{ zval zv;
if (zend_lex_tstring(&zv, $3) == FAILURE) { YYABORT; }
$$ = zend_ast_create(ZEND_AST_TRAIT_ALIAS, $1, zend_ast_create_zval(&zv)); }
| trait_method_reference T_AS member_modifier identifier
{ uint32_t modifiers = zend_modifier_token_to_flag(ZEND_MODIFIER_TARGET_METHOD, $3);
$$ = zend_ast_create_ex(ZEND_AST_TRAIT_ALIAS, modifiers, $1, $4);
/* identifier nonterminal can cause allocations, so we need to free the node */