convert: remove FromError, use From<E> instead

This removes the FromError trait, since it can now be expressed using
the new convert::Into trait. All implementations of FromError<E> where
changed to From<E>, and `try!` was changed to use From::from instead.

Because this removes FromError, it is a breaking change, but fixing it
simply requires changing the words `FromError` to `From`, and
`from_error` to `from`.

[breaking-change]

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libstd/sync/poison.rs b/src/libstd/sync/poison.rs
index c07c83d37f4..cea2def30f1 100644
--- a/src/libstd/sync/poison.rs
+++ b/src/libstd/sync/poison.rs
@@ -11,7 +11,7 @@
 use prelude::v1::*;
 
 use cell::UnsafeCell;
-use error::{Error, FromError};
+use error::{Error};
 use fmt;
 use thread;
 
@@ -144,8 +144,8 @@ impl<T> PoisonError<T> {
     pub fn get_mut(&mut self) -> &mut T { &mut self.guard }
 }
 
-impl<T> FromError<PoisonError<T>> for TryLockError<T> {
-    fn from_error(err: PoisonError<T>) -> TryLockError<T> {
+impl<T> From<PoisonError<T>> for TryLockError<T> {
+    fn from(err: PoisonError<T>) -> TryLockError<T> {
         TryLockError::Poisoned(err)
     }
 }