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Remove Traceable/Untraceable entirely

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This commit is contained in:
Manish Goregaokar 2014-09-29 07:06:24 +05:30
parent b7c3a1cd5d
commit 427b3b7733
4 changed files with 13 additions and 77 deletions
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73
components/script/dom/bindings/trace.rs
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@ -13,7 +13,7 @@
//! through `ProxyTraps.trace` otherwise.)
//! 2. `_trace` calls `Foo::trace()` (an implementation of `JSTraceable`).
//! This is typically derived via a #[jstraceable] annotation
//! 3. For all fields (except those wrapped in `Untraceable`), `Foo::trace()`
//! 3. For all fields, `Foo::trace()`
//! calls `trace()` on the field.
//! For example, for fields of type `JS<T>`, `JS<T>::trace()` calls
//! `trace_reflector()`.
@ -52,6 +52,7 @@ use std::io::timer::Timer;
use servo_msg::compositor_msg::ScriptListener;
use servo_msg::constellation_msg::ConstellationChan;
use layout_interface::{LayoutRPC, LayoutChan};
use dom::bindings::utils::WindowProxyHandler;
impl<T: Reflectable> JSTraceable for JS<T> {
fn trace(&self, trc: *mut JSTracer) {
@ -100,65 +101,6 @@ pub fn trace_object(tracer: *mut JSTracer, description: &str, obj: *mut JSObject
}
}
/// Encapsulates a type that cannot easily have `Encodable` derived automagically,
/// but also does not need to be made known to the SpiderMonkey garbage collector.
///
/// Use only with types that are not associated with a JS reflector and do not contain
/// fields of types associated with JS reflectors.
///
/// This should really only be used for types that are from other crates,
/// so we can't implement `Encodable`. See more details: mozilla#2662.
pub struct Untraceable<T> {
inner: T,
}
impl<T> Untraceable<T> {
pub fn new(val: T) -> Untraceable<T> {
Untraceable {
inner: val
}
}
}
impl<T> Deref<T> for Untraceable<T> {
fn deref<'a>(&'a self) -> &'a T {
&self.inner
}
}
impl<T> DerefMut<T> for Untraceable<T> {
fn deref_mut<'a>(&'a mut self) -> &'a mut T {
&mut self.inner
}
}
/// Encapsulates a type that can be traced but is boxed in a type we don't
/// control (such as `RefCell`).
///
/// Wrap a field in Traceable and implement the `Encodable` trait
/// for that new concrete type to achieve magic compiler-derived trace hooks.
///
/// We always prefer this, in case the contained type ever changes to something that should be traced.
/// See more details: mozilla#2662.
#[deriving(PartialEq, Clone)]
pub struct Traceable<T> {
inner: T
}
impl<T> Traceable<T> {
pub fn new(val: T) -> Traceable<T> {
Traceable {
inner: val
}
}
}
impl<T> Deref<T> for Traceable<T> {
fn deref<'a>(&'a self) -> &'a T {
&self.inner
}
}
impl<T: JSTraceable> JSTraceable for RefCell<T> {
fn trace(&self, trc: *mut JSTracer) {
self.borrow().trace(trc)
@ -177,13 +119,6 @@ impl<T: JSTraceable> JSTraceable for Box<T> {
}
}
impl<T: JSTraceable+Copy> JSTraceable for Traceable<Cell<T>> {
fn trace(&self, trc: *mut JSTracer) {
self.deref().get().trace(trc)
}
}
impl<T: JSTraceable+Copy> JSTraceable for Cell<T> {
fn trace(&self, trc: *mut JSTracer) {
self.get().trace(trc)
@ -236,14 +171,13 @@ impl<A: JSTraceable, B: JSTraceable> JSTraceable for (A, B) {
let (ref a, ref b) = *self;
a.trace(trc);
b.trace(trc);
}
}
}
untraceable!(bool, f32, f64, String, Url)
untraceable!(uint, u8, u16, u32, u64)
untraceable!(int, i8, i16, i32, i64)
untraceable!(Untraceable<T>)
untraceable!(Sender<T>)
untraceable!(Receiver<T>)
untraceable!(ImageCacheTask, ScriptControlChan)
@ -257,6 +191,7 @@ untraceable!(Cx)
untraceable!(ResponseHeaderCollection, RequestHeaderCollection, Method)
untraceable!(ConstellationChan)
untraceable!(LayoutChan)
untraceable!(WindowProxyHandler)
impl<'a> JSTraceable for &'a str {
#[inline]