@ -33,7 +33,7 @@ pub struct GlobalEnvironmentRecord {
impl GlobalEnvironmentRecord { impl GlobalEnvironmentRecord {
pub fn new ( global : JsObject , this_value : JsObject ) -> GlobalEnvironmentRecord { pub fn new ( global : JsObject , this_value : JsObject ) -> GlobalEnvironmentRecord {
let obj_rec = ObjectEnvironmentRecord { let obj_rec = ObjectEnvironmentRecord {
bindings : global . into ( ) , bindings : global ,
outer_env : None , outer_env : None ,
/// Object Environment Records created for with statements (13.11)
/// Object Environment Records created for with statements (13.11)
/// can provide their binding object as an implicit this value for use in function calls.
/// can provide their binding object as an implicit this value for use in function calls.
@ -53,156 +53,326 @@ impl GlobalEnvironmentRecord {
} }
} }
/// `9.1.1.4.12 HasVarDeclaration ( N )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-hasvardeclaration
pub fn has_var_declaration ( & self , name : & str ) -> bool { pub fn has_var_declaration ( & self , name : & str ) -> bool {
// 1. Let varDeclaredNames be envRec.[[VarNames]].
// 2. If varDeclaredNames contains N, return true.
// 3. Return false.
self . var_names . borrow ( ) . contains ( name ) self . var_names . borrow ( ) . contains ( name )
} }
pub fn has_lexical_declaration ( & self , name : & str ) -> bool { /// `9.1.1.4.13 HasLexicalDeclaration ( N )`
self . declarative_record . has_binding ( name ) ///
} /// More information:
/// - [ECMAScript reference][spec]
pub fn has_restricted_global_property ( & self , name : & str ) -> bool { ///
/// [spec]: https://tc39.es/ecma262/#sec-haslexicaldeclaration
pub fn has_lexical_declaration ( & self , name : & str , context : & mut Context ) -> JsResult < bool > {
// 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. Return DclRec.HasBinding(N).
self . declarative_record . has_binding ( name , context )
}
/// `9.1.1.4.14 HasRestrictedGlobalProperty ( N )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-hasrestrictedglobalproperty
pub fn has_restricted_global_property (
& self ,
name : & str ,
context : & mut Context ,
) -> JsResult < bool > {
// 1. Let ObjRec be envRec.[[ObjectRecord]].
// 2. Let globalObject be ObjRec.[[BindingObject]].
let global_object = & self . object_record . bindings ; let global_object = & self . object_record . bindings ;
let existing_prop = global_object . get_property ( name ) ;
match existing_prop { // 3. Let existingProp be ? globalObject.[[GetOwnProperty]](N).
Some ( desc ) = > { let existing_prop = global_object . __get_own_property__ ( & name . into ( ) , context ) ? ;
if desc . expect_configurable ( ) {
return false ; if let Some ( existing_prop ) = existing_prop {
} // 5. If existingProp.[[Configurable]] is true, return false.
true // 6. Return true.
} Ok ( ! existing_prop . expect_configurable ( ) )
None = > false , } else {
// 4. If existingProp is undefined, return false.
Ok ( false )
} }
} }
pub fn can_declare_global_var ( & self , name : & str ) -> bool { /// `9.1.1.4.15 CanDeclareGlobalVar ( N )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-candeclareglobalvar
pub fn can_declare_global_var ( & self , name : & str , context : & mut Context ) -> JsResult < bool > {
// 1. Let ObjRec be envRec.[[ObjectRecord]].
// 2. Let globalObject be ObjRec.[[BindingObject]].
let global_object = & self . object_record . bindings ; let global_object = & self . object_record . bindings ;
if global_object . has_field ( name ) {
true // 3. Let hasProperty be ? HasOwnProperty(globalObject, N).
} else { let has_property = global_object . has_own_property ( name , context ) ? ;
global_object . is_extensible ( )
// 4. If hasProperty is true, return true.
if has_property {
return Ok ( true ) ;
} }
// 5. Return ? IsExtensible(globalObject).
global_object . is_extensible ( context )
} }
pub fn can_declare_global_function ( & self , name : & str ) -> bool { /// `9.1.1.4.16 CanDeclareGlobalFunction ( N )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-candeclareglobalfunction
pub fn can_declare_global_function ( & self , name : & str , context : & mut Context ) -> JsResult < bool > {
// 1. Let ObjRec be envRec.[[ObjectRecord]].
// 2. Let globalObject be ObjRec.[[BindingObject]].
let global_object = & self . object_record . bindings ; let global_object = & self . object_record . bindings ;
let existing_prop = global_object . get_property ( name ) ;
match existing_prop { // 3. Let existingProp be ? globalObject.[[GetOwnProperty]](N).
Some ( prop ) = > { let existing_prop = global_object . __get_own_property__ ( & name . into ( ) , context ) ? ;
prop . expect_configurable ( )
| | prop if let Some ( existing_prop ) = existing_prop {
. enumerable ( ) // 5. If existingProp.[[Configurable]] is true, return true.
. zip ( prop . writable ( ) ) // 6. If IsDataDescriptor(existingProp) is true and existingProp has attribute values { [[Writable]]: true, [[Enumerable]]: true }, return true.
. map_or ( false , | ( a , b ) | a & & b ) if existing_prop . expect_configurable ( )
| | matches! (
(
existing_prop . is_data_descriptor ( ) ,
existing_prop . writable ( ) ,
existing_prop . enumerable ( ) ,
) ,
( true , Some ( true ) , Some ( true ) )
)
{
Ok ( true )
} else {
// 7. Return false.
Ok ( false )
} }
None = > global_object . is_extensible ( ) , } else {
// 4. If existingProp is undefined, return ? IsExtensible(globalObject).
global_object . is_extensible ( context )
} }
} }
/// `9.1.1.4.17 CreateGlobalVarBinding ( N, D )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-createglobalvarbinding
pub fn create_global_var_binding ( pub fn create_global_var_binding (
& mut self , & mut self ,
name : String , name : & str ,
deletion : bool , deletion : bool ,
context : & mut Context , context : & mut Context ,
) -> JsResult < ( ) > { ) -> JsResult < ( ) > {
let obj_rec = & mut self . object_record ; // 1. Let ObjRec be envRec.[[ObjectRecord]].
let global_object = & obj_rec . bindings ; // 2. Let globalObject be ObjRec.[[BindingObject]].
let has_property = global_object . has_field ( name . as_str ( ) ) ; let global_object = & self . object_record . bindings ;
let extensible = global_object . is_extensible ( ) ;
// 3. Let hasProperty be ? HasOwnProperty(globalObject, N).
let has_property = global_object . has_own_property ( name , context ) ? ;
// 4. Let extensible be ? IsExtensible(globalObject).
let extensible = global_object . is_extensible ( context ) ? ;
// 5. If hasProperty is false and extensible is true, then
if ! has_property & & extensible { if ! has_property & & extensible {
obj_rec . create_mutable_binding ( name . clone ( ) , deletion , false , context ) ? ; // a. Perform ? ObjRec.CreateMutableBinding(N, D).
obj_rec . initialize_binding ( & name , JsValue ::undefined ( ) , context ) ? ; self . object_record
. create_mutable_binding ( name , deletion , false , context ) ? ;
// b. Perform ? ObjRec.InitializeBinding(N, undefined).
self . object_record
. initialize_binding ( name , JsValue ::undefined ( ) , context ) ? ;
} }
// 6. Let varDeclaredNames be envRec.[[VarNames]].
let mut var_declared_names = self . var_names . borrow_mut ( ) ; let mut var_declared_names = self . var_names . borrow_mut ( ) ;
if ! var_declared_names . contains ( name . as_str ( ) ) { // 7. If varDeclaredNames does not contain N, then
var_declared_names . insert ( name . into_boxed_str ( ) ) ; if ! var_declared_names . contains ( name ) {
// a. Append N to varDeclaredNames.
var_declared_names . insert ( name . into ( ) ) ;
} }
// 8. Return NormalCompletion(empty).
Ok ( ( ) ) Ok ( ( ) )
} }
pub fn create_global_function_binding ( & mut self , name : & str , value : JsValue , deletion : bool ) { /// `9.1.1.4.18 CreateGlobalFunctionBinding ( N, V, D )`
let global_object = & mut self . object_record . bindings ; ///
let existing_prop = global_object . get_property ( name ) ; /// More information:
// TODO: change to desc.is_undefined()
/// - [ECMAScript reference][spec]
let desc = match existing_prop { ///
Some ( desc ) if desc . expect_configurable ( ) = > PropertyDescriptor ::builder ( ) . value ( value ) , /// [spec]: https://tc39.es/ecma262/#sec-createglobalfunctionbinding
Some ( _ ) = > PropertyDescriptor ::builder ( ) pub fn create_global_function_binding (
. value ( value ) & mut self ,
name : & str ,
value : JsValue ,
deletion : bool ,
context : & mut Context ,
) -> JsResult < ( ) > {
// 1. Let ObjRec be envRec.[[ObjectRecord]].
// 2. Let globalObject be ObjRec.[[BindingObject]].
let global_object = & self . object_record . bindings ;
// 3. Let existingProp be ? globalObject.[[GetOwnProperty]](N).
let existing_prop = global_object . __get_own_property__ ( & name . into ( ) , context ) ? ;
// 4. If existingProp is undefined or existingProp.[[Configurable]] is true, then
let desc = if existing_prop
. map ( | f | f . expect_configurable ( ) )
. unwrap_or ( true )
{
// a. Let desc be the PropertyDescriptor { [[Value]]: V, [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: D }.
PropertyDescriptor ::builder ( )
. value ( value . clone ( ) )
. writable ( true ) . writable ( true )
. enumerable ( true ) . enumerable ( true )
. configurable ( deletion ) , . configurable ( deletion )
None = > PropertyDescriptor ::builder ( ) . value ( value ) , . build ( )
// 5. Else,
} else {
// a. Let desc be the PropertyDescriptor { [[Value]]: V }.
PropertyDescriptor ::builder ( ) . value ( value . clone ( ) ) . build ( )
} ; } ;
// TODO: fix spec by adding Set and append name to varDeclaredNames
// 6. Perform ? DefinePropertyOrThrow(globalObject, N, desc).
global_object global_object . define_property_or_throw ( name , desc , context ) ? ;
. as_object ( ) // 7. Perform ? Set(globalObject, N, V, false).
. expect ( "global object" ) global_object . set ( name , value , false , context ) ? ;
. insert ( name , desc ) ;
} // 8. Let varDeclaredNames be envRec.[[VarNames]].
// 9. If varDeclaredNames does not contain N, then
if ! self . var_names . borrow ( ) . contains ( name ) {
// a. Append N to varDeclaredNames.
self . var_names . borrow_mut ( ) . insert ( name . into ( ) ) ;
} }
impl EnvironmentRecordTrait for GlobalEnvironmentRecord { // 10. Return NormalCompletion(empty).
fn has_binding ( & self , name : & str ) -> bool { Ok ( ( ) )
if self . declarative_record . has_binding ( name ) {
return true ;
} }
self . object_record . has_binding ( name )
} }
impl EnvironmentRecordTrait for GlobalEnvironmentRecord {
/// `9.1.1.4.1 HasBinding ( N )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-hasbinding-n
fn has_binding ( & self , name : & str , context : & mut Context ) -> JsResult < bool > {
// 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, return true.
if self . declarative_record . has_binding ( name , context ) ? {
return Ok ( true ) ;
}
// 3. Let ObjRec be envRec.[[ObjectRecord]].
// 4. Return ? ObjRec.HasBinding(N).
self . object_record . has_binding ( name , context )
}
/// `9.1.1.4.2 CreateMutableBinding ( N, D )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-createmutablebinding-n-d
fn create_mutable_binding ( fn create_mutable_binding (
& self , & self ,
name : String , name : & str ,
deletion : bool , deletion : bool ,
allow_name_reuse : bool , allow_name_reuse : bool ,
context : & mut Context , context : & mut Context ,
) -> JsResult < ( ) > { ) -> JsResult < ( ) > {
if ! allow_name_reuse & & self . declarative_record . has_binding ( & name ) { // 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, throw a TypeError exception.
if ! allow_name_reuse & & self . declarative_record . has_binding ( name , context ) ? {
return Err ( return Err (
context . construct_type_error ( format! ( "Binding already exists for {}" , name ) ) context . construct_type_error ( format! ( "Binding already exists for {}" , name ) )
) ; ) ;
} }
// 3. Return DclRec.CreateMutableBinding(N, D).
self . declarative_record self . declarative_record
. create_mutable_binding ( name , deletion , allow_name_reuse , context ) . create_mutable_binding ( name , deletion , allow_name_reuse , context )
} }
/// `9.1.1.4.3 CreateImmutableBinding ( N, S )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-createimmutablebinding-n-s
fn create_immutable_binding ( fn create_immutable_binding (
& self , & self ,
name : String , name : & str ,
strict : bool , strict : bool ,
context : & mut Context , context : & mut Context ,
) -> JsResult < ( ) > { ) -> JsResult < ( ) > {
if self . declarative_record . has_binding ( & name ) { // 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, throw a TypeError exception.
if self . declarative_record . has_binding ( name , context ) ? {
return Err ( return Err (
context . construct_type_error ( format! ( "Binding already exists for {}" , name ) ) context . construct_type_error ( format! ( "Binding already exists for {}" , name ) )
) ; ) ;
} }
// 3. Return DclRec.CreateImmutableBinding(N, S).
self . declarative_record self . declarative_record
. create_immutable_binding ( name , strict , context ) . create_immutable_binding ( name , strict , context )
} }
/// `9.1.1.4.4 InitializeBinding ( N, V )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-initializebinding-n-v
fn initialize_binding ( fn initialize_binding (
& self , & self ,
name : & str , name : & str ,
value : JsValue , value : JsValue ,
context : & mut Context , context : & mut Context ,
) -> JsResult < ( ) > { ) -> JsResult < ( ) > {
if self . declarative_record . has_binding ( name ) { // 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, then
if self . declarative_record . has_binding ( name , context ) ? {
// a. Return DclRec.InitializeBinding(N, V).
return self return self
. declarative_record . declarative_record
. initialize_binding ( name , value , context ) ; . initialize_binding ( name , value , context ) ;
} }
// 3. Assert: If the binding exists, it must be in the object Environment Record.
assert! ( assert! (
self . object_record . has_binding ( name ) , self . object_record . has_binding ( name , context ) ? ,
"Binding must be in object_record" "Binding must be in object_record"
) ; ) ;
// 4. Let ObjRec be envRec.[[ObjectRecord]].
// 5. Return ? ObjRec.InitializeBinding(N, V).
self . object_record . initialize_binding ( name , value , context ) self . object_record . initialize_binding ( name , value , context )
} }
/// `9.1.1.4.5 SetMutableBinding ( N, V, S )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-setmutablebinding-n-v-s
fn set_mutable_binding ( fn set_mutable_binding (
& self , & self ,
name : & str , name : & str ,
@ -210,64 +380,130 @@ impl EnvironmentRecordTrait for GlobalEnvironmentRecord {
strict : bool , strict : bool ,
context : & mut Context , context : & mut Context ,
) -> JsResult < ( ) > { ) -> JsResult < ( ) > {
if self . declarative_record . has_binding ( name ) { // 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, then
if self . declarative_record . has_binding ( name , context ) ? {
// a. Return DclRec.SetMutableBinding(N, V, S).
return self return self
. declarative_record . declarative_record
. set_mutable_binding ( name , value , strict , context ) ; . set_mutable_binding ( name , value , strict , context ) ;
} }
// 3. Let ObjRec be envRec.[[ObjectRecord]].
// 4. Return ? ObjRec.SetMutableBinding(N, V, S).
self . object_record self . object_record
. set_mutable_binding ( name , value , strict , context ) . set_mutable_binding ( name , value , strict , context )
} }
/// `9.1.1.4.6 GetBindingValue ( N, S )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-getbindingvalue-n-s
fn get_binding_value ( fn get_binding_value (
& self , & self ,
name : & str , name : & str ,
strict : bool , strict : bool ,
context : & mut Context , context : & mut Context ,
) -> JsResult < JsValue > { ) -> JsResult < JsValue > {
if self . declarative_record . has_binding ( name ) { // 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, then
if self . declarative_record . has_binding ( name , context ) ? {
// a. Return DclRec.GetBindingValue(N, S).
return self return self
. declarative_record . declarative_record
. get_binding_value ( name , strict , context ) ; . get_binding_value ( name , strict , context ) ;
} }
// 3. Let ObjRec be envRec.[[ObjectRecord]].
// 4. Return ? ObjRec.GetBindingValue(N, S).
self . object_record . get_binding_value ( name , strict , context ) self . object_record . get_binding_value ( name , strict , context )
} }
fn delete_binding ( & self , name : & str ) -> bool { /// `9.1.1.4.7 DeleteBinding ( N )`
if self . declarative_record . has_binding ( name ) { ///
return self . declarative_record . delete_binding ( name ) ; /// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-deletebinding-n
fn delete_binding ( & self , name : & str , context : & mut Context ) -> JsResult < bool > {
// 1. Let DclRec be envRec.[[DeclarativeRecord]].
// 2. If DclRec.HasBinding(N) is true, then
if self . declarative_record . has_binding ( name , context ) ? {
// a. Return DclRec.DeleteBinding(N).
return self . declarative_record . delete_binding ( name , context ) ;
} }
let global : & JsValue = & self . object_record . bindings ; // 3. Let ObjRec be envRec.[[ObjectRecord]].
if global . has_field ( name ) { // 4. Let globalObject be ObjRec.[[BindingObject]].
let status = self . object_record . delete_binding ( name ) ; let global_object = & self . object_record . bindings ;
// 5. Let existingProp be ? HasOwnProperty(globalObject, N).
// 6. If existingProp is true, then
if global_object . has_own_property ( name , context ) ? {
// a. Let status be ? ObjRec.DeleteBinding(N).
let status = self . object_record . delete_binding ( name , context ) ? ;
// b. If status is true, then
if status { if status {
let mut var_names = self . var_names . borrow_mut ( ) ; // i. Let varNames be envRec.[[VarNames]].
if var_names . contains ( name ) { // ii. If N is an element of varNames, remove that element from the varNames.
var_names . remove ( name ) ; self . var_names . borrow_mut ( ) . remove ( name ) ;
return status ;
}
} }
// c. Return status.
return Ok ( status ) ;
} }
true
// 7. Return true.
Ok ( true )
} }
/// `9.1.1.4.8 HasThisBinding ( )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-hasthisbinding
fn has_this_binding ( & self ) -> bool { fn has_this_binding ( & self ) -> bool {
// 1. Return true.
true true
} }
fn get_this_binding ( & self , _context : & mut Context ) -> JsResult < JsValue > { /// `9.1.1.4.9 HasSuperBinding ( )`
Ok ( self . global_this_binding . clone ( ) . into ( ) ) ///
} /// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-hassuperbinding
fn has_super_binding ( & self ) -> bool { fn has_super_binding ( & self ) -> bool {
// 1. Return false.
false false
} }
/// `9.1.1.4.10 WithBaseObject ( )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-withbaseobject
fn with_base_object ( & self ) -> Option < JsObject > { fn with_base_object ( & self ) -> Option < JsObject > {
// 1. Return undefined.
None None
} }
/// `9.1.1.4.11 GetThisBinding ( )`
///
/// More information:
/// - [ECMAScript reference][spec]
///
/// [spec]: https://tc39.es/ecma262/#sec-global-environment-records-getthisbinding
fn get_this_binding ( & self , _context : & mut Context ) -> JsResult < JsValue > {
// 1. Return envRec.[[GlobalThisValue]].
Ok ( self . global_this_binding . clone ( ) . into ( ) )
}
fn get_outer_environment ( & self ) -> Option < Environment > { fn get_outer_environment ( & self ) -> Option < Environment > {
None None
} }
@ -287,7 +523,7 @@ impl EnvironmentRecordTrait for GlobalEnvironmentRecord {
fn recursive_create_mutable_binding ( fn recursive_create_mutable_binding (
& self , & self ,
name : String , name : & str ,
deletion : bool , deletion : bool ,
_scope : VariableScope , _scope : VariableScope ,
context : & mut Context , context : & mut Context ,
@ -297,7 +533,7 @@ impl EnvironmentRecordTrait for GlobalEnvironmentRecord {
fn recursive_create_immutable_binding ( fn recursive_create_immutable_binding (
& self , & self ,
name : String , name : & str ,
deletion : bool , deletion : bool ,
_scope : VariableScope , _scope : VariableScope ,
context : & mut Context , context : & mut Context ,
raskad
3 years ago
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