From 1403df72c82d3c3c2c19369c5f4bb34b3e095604 Mon Sep 17 00:00:00 2001
From: Marco A L Barbosa <malbarbo@gmail.com>
Date: Fri, 5 Aug 2016 16:57:19 -0300
Subject: [PATCH] Implement From for Cell, RefCell and UnsafeCell
---
src/libcore/cell.rs | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index 06af200e47839..eb694319f42ef 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -146,6 +146,7 @@
use clone::Clone;
use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
+use convert::From;
use default::Default;
use marker::{Copy, Send, Sync, Sized, Unsize};
use ops::{Deref, DerefMut, Drop, FnOnce, CoerceUnsized};
@@ -326,6 +327,13 @@ impl<T:Ord + Copy> Ord for Cell<T> {
}
}
+#[stable(feature = "cell_from", since = "1.12.0")]
+impl<T: Copy> From<T> for Cell<T> {
+ fn from(t: T) -> Cell<T> {
+ Cell::new(t)
+ }
+}
+
/// A mutable memory location with dynamically checked borrow rules
///
/// See the [module-level documentation](index.html) for more.
@@ -635,6 +643,13 @@ impl<T: ?Sized + Ord> Ord for RefCell<T> {
}
}
+#[stable(feature = "cell_from", since = "1.12.0")]
+impl<T> From<T> for RefCell<T> {
+ fn from(t: T) -> RefCell<T> {
+ RefCell::new(t)
+ }
+}
+
struct BorrowRef<'b> {
borrow: &'b Cell<BorrowFlag>,
}
@@ -957,3 +972,10 @@ impl<T: Default> Default for UnsafeCell<T> {
UnsafeCell::new(Default::default())
}
}
+
+#[stable(feature = "cell_from", since = "1.12.0")]
+impl<T> From<T> for UnsafeCell<T> {
+ fn from(t: T) -> UnsafeCell<T> {
+ UnsafeCell::new(t)
+ }
+}