add stage3 markers where necessary for dist-snap

src/libcore/comm.rs

@@ -110,6 +110,7 @@ pub fn stream<T:Owned>() -> (Port<T>, Chan<T>) {
 // required.
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 pub impl<T: Owned> Chan<T> {
     fn send(&self, x: T) { chan_send(self, x) }
     fn try_send(&self, x: T) -> bool { chan_try_send(self, x) }
@@ -149,6 +150,7 @@ fn chan_try_send<T:Owned>(self: &Chan<T>, x: T) -> bool {
 // Use an inherent impl so that imports are not required:
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 pub impl<T: Owned> Port<T> {
     fn recv(&self) -> T { port_recv(self) }
     fn try_recv(&self) -> Option<T> { port_try_recv(self) }
@@ -226,6 +228,7 @@ pub fn PortSet<T: Owned>() -> PortSet<T>{
 // Use an inherent impl so that imports are not required:
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 pub impl<T:Owned> PortSet<T> {
     fn recv(&self) -> T { port_set_recv(self) }
     fn try_recv(&self) -> Option<T> { port_set_try_recv(self) }
@@ -301,6 +304,7 @@ impl<T: Owned> Peekable<T> for PortSet<T> {
 
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 pub impl<T: Owned> SharedChan<T> {
     fn send(&self, x: T) { shared_chan_send(self, x) }
     fn try_send(&self, x: T) -> bool { shared_chan_try_send(self, x) }

src/libcore/io.rs

@@ -77,6 +77,7 @@ pub trait Reader {
 
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 impl Reader for @Reader {
     fn read(&self, bytes: &mut [u8], len: uint) -> uint {
         self.read(bytes, len)
@@ -659,6 +660,7 @@ pub trait Writer {
 
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 impl Writer for @Writer {
     fn write(&self, v: &[const u8]) { self.write(v) }
     fn seek(&self, a: int, b: SeekStyle) { self.seek(a, b) }

src/librustc/front/test.rs

@@ -369,6 +369,7 @@ fn mk_tests(cx: &TestCtxt) -> @ast::item {
 
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 fn mk_tests(cx: &TestCtxt) -> @ast::item {
 
     let ext_cx = cx.ext_cx;

src/libstd/comm.rs

@@ -28,6 +28,7 @@ pub struct DuplexStream<T, U> {
 // Allow these methods to be used without import:
 #[cfg(stage1)]
 #[cfg(stage2)]
+#[cfg(stage3)]
 pub impl<T:Owned,U:Owned> DuplexStream<T, U> {
     fn send(&self, x: T) {
         self.chan.send(x)