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@ -2,7 +2,7 @@ |
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//!
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//!
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//! The `GcObject` is a garbage collected Object.
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//! The `GcObject` is a garbage collected Object.
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use super::{Object, PROTOTYPE}; |
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use super::{NativeObject, Object, PROTOTYPE}; |
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use crate::{ |
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use crate::{ |
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builtins::function::{ |
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builtins::function::{ |
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create_unmapped_arguments_object, BuiltInFunction, Function, NativeFunction, |
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create_unmapped_arguments_object, BuiltInFunction, Function, NativeFunction, |
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@ -25,18 +25,20 @@ use std::{ |
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result::Result as StdResult, |
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result::Result as StdResult, |
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}; |
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}; |
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/// A wrapper type for an immutably borrowed `Object`.
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/// A wrapper type for an immutably borrowed type T.
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pub type Ref<'object> = GcCellRef<'object, Object>; |
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pub type Ref<'a, T> = GcCellRef<'a, T>; |
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/// A wrapper type for a mutably borrowed `Object`.
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/// A wrapper type for a mutably borrowed type T.
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pub type RefMut<'object> = GcCellRefMut<'object, Object>; |
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pub type RefMut<'a, T> = GcCellRefMut<'a, T>; |
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/// Garbage collected `Object`.
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/// Garbage collected `Object`.
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#[derive(Trace, Finalize, Clone, Default)] |
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#[derive(Trace, Finalize, Clone, Default)] |
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pub struct GcObject(Gc<GcCell<Object>>); |
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pub struct GcObject(Gc<GcCell<Object>>); |
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// This is needed for the call method since we cannot mutate the function itself since we
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/// The body of a JavaScript function.
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// already borrow it so we get the function body clone it then drop the borrow and run the body
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///
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/// This is needed for the call method since we cannot mutate the function itself since we
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/// already borrow it so we get the function body clone it then drop the borrow and run the body
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enum FunctionBody { |
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enum FunctionBody { |
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BuiltIn(NativeFunction), |
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BuiltIn(NativeFunction), |
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Ordinary(RcStatementList), |
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Ordinary(RcStatementList), |
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@ -51,27 +53,28 @@ impl GcObject { |
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/// Immutably borrows the `Object`.
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/// Immutably borrows the `Object`.
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///
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///
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/// The borrow lasts until the returned `GcCellRef` exits scope.
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/// The borrow lasts until the returned `Ref` exits scope.
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/// Multiple immutable borrows can be taken out at the same time.
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/// Multiple immutable borrows can be taken out at the same time.
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///
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///
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///# Panics
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[inline] |
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#[track_caller] |
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#[track_caller] |
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pub fn borrow(&self) -> Ref<'_> { |
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pub fn borrow(&self) -> Ref<'_, Object> { |
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self.try_borrow().expect("Object already mutably borrowed") |
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self.try_borrow().expect("Object already mutably borrowed") |
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} |
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} |
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/// Mutably borrows the Object.
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/// Mutably borrows the Object.
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///
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///
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/// The borrow lasts until the returned `GcCellRefMut` exits scope.
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/// The borrow lasts until the returned `RefMut` exits scope.
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/// The object cannot be borrowed while this borrow is active.
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/// The object cannot be borrowed while this borrow is active.
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///
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///
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///# Panics
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///# Panics
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/// Panics if the object is currently borrowed.
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/// Panics if the object is currently borrowed.
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#[inline] |
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#[inline] |
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#[track_caller] |
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#[track_caller] |
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pub fn borrow_mut(&self) -> RefMut<'_> { |
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pub fn borrow_mut(&self) -> RefMut<'_, Object> { |
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self.try_borrow_mut().expect("Object already borrowed") |
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self.try_borrow_mut().expect("Object already borrowed") |
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} |
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} |
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@ -82,7 +85,7 @@ impl GcObject { |
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///
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///
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/// This is the non-panicking variant of [`borrow`](#method.borrow).
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/// This is the non-panicking variant of [`borrow`](#method.borrow).
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#[inline] |
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#[inline] |
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pub fn try_borrow(&self) -> StdResult<Ref<'_>, BorrowError> { |
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pub fn try_borrow(&self) -> StdResult<Ref<'_, Object>, BorrowError> { |
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self.0.try_borrow().map_err(|_| BorrowError) |
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self.0.try_borrow().map_err(|_| BorrowError) |
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} |
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} |
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@ -93,7 +96,7 @@ impl GcObject { |
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///
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///
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/// This is the non-panicking variant of [`borrow_mut`](#method.borrow_mut).
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/// This is the non-panicking variant of [`borrow_mut`](#method.borrow_mut).
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#[inline] |
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#[inline] |
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pub fn try_borrow_mut(&self) -> StdResult<RefMut<'_>, BorrowMutError> { |
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pub fn try_borrow_mut(&self) -> StdResult<RefMut<'_, Object>, BorrowMutError> { |
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self.0.try_borrow_mut().map_err(|_| BorrowMutError) |
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self.0.try_borrow_mut().map_err(|_| BorrowMutError) |
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} |
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} |
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@ -105,7 +108,8 @@ impl GcObject { |
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/// Call this object.
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/// Call this object.
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///
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///
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///# Panics
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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/// Panics if the object is currently mutably borrowed.
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// <https://tc39.es/ecma262/#sec-prepareforordinarycall>
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// <https://tc39.es/ecma262/#sec-prepareforordinarycall>
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// <https://tc39.es/ecma262/#sec-ecmascript-function-objects-call-thisargument-argumentslist>
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// <https://tc39.es/ecma262/#sec-ecmascript-function-objects-call-thisargument-argumentslist>
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@ -188,12 +192,13 @@ impl GcObject { |
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/// Construct an instance of this object with the specified arguments.
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/// Construct an instance of this object with the specified arguments.
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///
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///
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///# Panics
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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/// Panics if the object is currently mutably borrowed.
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// <https://tc39.es/ecma262/#sec-ecmascript-function-objects-construct-argumentslist-newtarget>
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// <https://tc39.es/ecma262/#sec-ecmascript-function-objects-construct-argumentslist-newtarget>
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#[track_caller] |
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#[track_caller] |
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pub fn construct(&self, args: &[Value], ctx: &mut Context) -> Result<Value> { |
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pub fn construct(&self, args: &[Value], ctx: &mut Context) -> Result<Value> { |
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let this: Value = Object::create(self.borrow().get(&PROTOTYPE.into())).into(); |
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let this: Value = Object::create(self.get(&PROTOTYPE.into())).into(); |
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let this_function_object = self.clone(); |
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let this_function_object = self.clone(); |
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let body = if let Some(function) = self.borrow().as_function() { |
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let body = if let Some(function) = self.borrow().as_function() { |
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@ -348,7 +353,7 @@ impl GcObject { |
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let rec_limiter = RecursionLimiter::new(self); |
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let rec_limiter = RecursionLimiter::new(self); |
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if rec_limiter.live { |
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if rec_limiter.live { |
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Err(interpreter.construct_type_error("cyclic object value")) |
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Err(interpreter.construct_type_error("cyclic object value")) |
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} else if self.borrow().is_array() { |
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} else if self.is_array() { |
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let mut keys: Vec<u32> = self.borrow().index_property_keys().cloned().collect(); |
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let mut keys: Vec<u32> = self.borrow().index_property_keys().cloned().collect(); |
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keys.sort_unstable(); |
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keys.sort_unstable(); |
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let mut arr: Vec<JSONValue> = Vec::with_capacity(keys.len()); |
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let mut arr: Vec<JSONValue> = Vec::with_capacity(keys.len()); |
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@ -376,44 +381,45 @@ impl GcObject { |
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} |
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} |
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} |
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} |
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/// Convert the object to a `PropertyDescritptor`
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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pub fn to_property_descriptor(&self, context: &mut Context) -> Result<PropertyDescriptor> { |
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pub fn to_property_descriptor(&self, context: &mut Context) -> Result<PropertyDescriptor> { |
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let mut attribute = Attribute::empty(); |
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let mut attribute = Attribute::empty(); |
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let enumerable_key = PropertyKey::from("enumerable"); |
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let enumerable_key = PropertyKey::from("enumerable"); |
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if self.borrow().has_property(&enumerable_key) |
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if self.has_property(&enumerable_key) && self.get(&enumerable_key).to_boolean() { |
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&& self.borrow().get(&enumerable_key).to_boolean() |
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{ |
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attribute |= Attribute::ENUMERABLE; |
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attribute |= Attribute::ENUMERABLE; |
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} |
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} |
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let configurable_key = PropertyKey::from("configurable"); |
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let configurable_key = PropertyKey::from("configurable"); |
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if self.borrow().has_property(&configurable_key) |
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if self.has_property(&configurable_key) && self.get(&configurable_key).to_boolean() { |
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&& self.borrow().get(&configurable_key).to_boolean() |
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{ |
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attribute |= Attribute::CONFIGURABLE; |
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attribute |= Attribute::CONFIGURABLE; |
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} |
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} |
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let mut value = None; |
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let mut value = None; |
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let value_key = PropertyKey::from("value"); |
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let value_key = PropertyKey::from("value"); |
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if self.borrow().has_property(&value_key) { |
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if self.has_property(&value_key) { |
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value = Some(self.borrow().get(&value_key)); |
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value = Some(self.get(&value_key)); |
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} |
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} |
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let mut has_writable = false; |
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let mut has_writable = false; |
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let writable_key = PropertyKey::from("writable"); |
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let writable_key = PropertyKey::from("writable"); |
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if self.borrow().has_property(&writable_key) { |
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if self.has_property(&writable_key) { |
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has_writable = true; |
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has_writable = true; |
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if self.borrow().get(&writable_key).to_boolean() { |
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if self.get(&writable_key).to_boolean() { |
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attribute |= Attribute::WRITABLE; |
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attribute |= Attribute::WRITABLE; |
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} |
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} |
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} |
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} |
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let mut get = None; |
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let mut get = None; |
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let get_key = PropertyKey::from("get"); |
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let get_key = PropertyKey::from("get"); |
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if self.borrow().has_property(&get_key) { |
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if self.has_property(&get_key) { |
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let getter = self.borrow().get(&get_key); |
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let getter = self.get(&get_key); |
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match getter { |
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match getter { |
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Value::Object(ref object) if object.borrow().is_callable() => { |
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Value::Object(ref object) if object.is_callable() => { |
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get = Some(object.clone()); |
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get = Some(object.clone()); |
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} |
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} |
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_ => { |
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_ => { |
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@ -426,10 +432,10 @@ impl GcObject { |
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let mut set = None; |
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let mut set = None; |
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let set_key = PropertyKey::from("set"); |
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let set_key = PropertyKey::from("set"); |
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if self.borrow().has_property(&set_key) { |
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if self.has_property(&set_key) { |
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let setter = self.borrow().get(&set_key); |
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let setter = self.get(&set_key); |
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match setter { |
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match setter { |
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Value::Object(ref object) if object.borrow().is_callable() => { |
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Value::Object(ref object) if object.is_callable() => { |
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set = Some(object.clone()); |
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set = Some(object.clone()); |
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} |
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} |
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_ => { |
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_ => { |
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@ -450,6 +456,226 @@ impl GcObject { |
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Ok(DataDescriptor::new(value.unwrap_or_else(Value::undefined), attribute).into()) |
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Ok(DataDescriptor::new(value.unwrap_or_else(Value::undefined), attribute).into()) |
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} |
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} |
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} |
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} |
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/// Reeturn `true` if it is a native object and the native type is `T`.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is<T>(&self) -> bool |
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where |
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T: NativeObject, |
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{ |
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self.borrow().is::<T>() |
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} |
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/// Downcast a reference to the object,
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/// if the object is type native object type `T`.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn downcast_ref<T>(&self) -> Option<Ref<'_, T>> |
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where |
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T: NativeObject, |
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{ |
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let object = self.borrow(); |
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if object.is::<T>() { |
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Some(Ref::map(object, |x| x.downcast_ref::<T>().unwrap())) |
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} else { |
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None |
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} |
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} |
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/// Downcast a mutable reference to the object,
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/// if the object is type native object type `T`.
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///
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/// # Panics
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///
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/// Panics if the object is currently borrowed.
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#[inline] |
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#[track_caller] |
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pub fn downcast_mut<T>(&mut self) -> Option<RefMut<'_, T>> |
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where |
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T: NativeObject, |
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{ |
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let object = self.borrow_mut(); |
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if object.is::<T>() { |
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Some(RefMut::map(object, |x| x.downcast_mut::<T>().unwrap())) |
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} else { |
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None |
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} |
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} |
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/// Get the prototype of the object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn prototype_instance(&self) -> Value { |
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self.borrow().prototype_instance().clone() |
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} |
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/// Set the prototype of the object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed
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/// or if th prototype is not an object or undefined.
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#[inline] |
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#[track_caller] |
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pub fn set_prototype_instance(&mut self, prototype: Value) { |
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self.borrow_mut().set_prototype_instance(prototype) |
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} |
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/// Checks if it an `Array` object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_array(&self) -> bool { |
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self.borrow().is_array() |
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} |
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/// Checks if it is an `ArrayIterator` object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_array_iterator(&self) -> bool { |
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self.borrow().is_array_iterator() |
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} |
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/// Checks if it is a `Map` object.pub
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_map(&self) -> bool { |
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self.borrow().is_map() |
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} |
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/// Checks if it a `String` object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_string(&self) -> bool { |
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self.borrow().is_string() |
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} |
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/// Checks if it a `Function` object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_function(&self) -> bool { |
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self.borrow().is_function() |
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} |
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/// Checks if it a Symbol object.
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///
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/// # Panics
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///
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/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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pub fn is_symbol(&self) -> bool { |
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|
self.borrow().is_symbol() |
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} |
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/// Checks if it an Error object.
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///
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/// # Panics
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///
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|
/// Panics if the object is currently mutably borrowed.
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#[inline] |
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#[track_caller] |
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|
pub fn is_error(&self) -> bool { |
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|
self.borrow().is_error() |
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} |
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|
/// Checks if it a Boolean object.
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///
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/// # Panics
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///
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|
/// Panics if the object is currently mutably borrowed.
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|
#[inline] |
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#[track_caller] |
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|
pub fn is_boolean(&self) -> bool { |
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|
|
self.borrow().is_boolean() |
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|
} |
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|
/// Checks if it a `Number` object.
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///
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|
/// # Panics
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|
///
|
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|
/// Panics if the object is currently mutably borrowed.
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|
#[inline] |
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|
#[track_caller] |
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|
pub fn is_number(&self) -> bool { |
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|
|
self.borrow().is_number() |
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|
} |
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|
/// Checks if it a `BigInt` object.
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///
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|
/// # Panics
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|
///
|
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|
/// Panics if the object is currently mutably borrowed.
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|
#[inline] |
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#[track_caller] |
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|
pub fn is_bigint(&self) -> bool { |
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|
|
self.borrow().is_bigint() |
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|
|
} |
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|
|
/// Checks if it a `RegExp` object.
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|
///
|
|
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|
/// # Panics
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|
///
|
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|
/// Panics if the object is currently mutably borrowed.
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|
#[inline] |
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#[track_caller] |
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|
pub fn is_regexp(&self) -> bool { |
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|
|
|
self.borrow().is_regexp() |
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|
|
|
} |
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|
|
/// Checks if it an ordinary object.
|
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|
///
|
|
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|
|
/// # Panics
|
|
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|
|
|
///
|
|
|
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|
|
/// Panics if the object is currently mutably borrowed.
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|
|
#[inline] |
|
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|
|
#[track_caller] |
|
|
|
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|
|
pub fn is_ordinary(&self) -> bool { |
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|
|
|
|
|
|
self.borrow().is_ordinary() |
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|
|
|
|
|
|
} |
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|
|
/// Returns `true` if it holds an Rust type that implements `NativeObject`.
|
|
|
|
|
|
|
|
///
|
|
|
|
|
|
|
|
/// # Panics
|
|
|
|
|
|
|
|
///
|
|
|
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|
/// Panics if the object is currently mutably borrowed.
|
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|
|
#[inline] |
|
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|
|
#[track_caller] |
|
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|
|
pub fn is_native_object(&self) -> bool { |
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|
|
|
|
|
|
self.borrow().is_native_object() |
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|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
impl AsRef<GcCell<Object>> for GcObject { |
|
|
|
impl AsRef<GcCell<Object>> for GcObject { |
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|
|
|
Halid Odat
4 years ago
committed by
GitHub