Rename std::borrow to std::reference.

Fixes #11814

1 files changed, 86 insertions, 0 deletions

diff --git a/src/libstd/reference.rs b/src/libstd/reference.rs
new file mode 100644
index 00000000000..66df4334adc
--- /dev/null
+++ b/src/libstd/reference.rs
@@ -0,0 +1,86 @@
+// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Utilities for references
+
+#[cfg(not(test))]
+use prelude::*;
+
+/// Cast a region pointer - &T - to a uint.
+#[inline]
+pub fn to_uint<T>(thing: &T) -> uint {
+    thing as *T as uint
+}
+
+/// Determine if two borrowed pointers point to the same thing.
+#[inline]
+pub fn ref_eq<'a, 'b, T>(thing: &'a T, other: &'b T) -> bool {
+    (thing as *T) == (other as *T)
+}
+
+// Equality for region pointers
+#[cfg(not(test))]
+impl<'a, T: Eq> Eq for &'a T {
+    #[inline]
+    fn eq(&self, other: & &'a T) -> bool {
+        *(*self) == *(*other)
+    }
+    #[inline]
+    fn ne(&self, other: & &'a T) -> bool {
+        *(*self) != *(*other)
+    }
+}
+
+// Comparison for region pointers
+#[cfg(not(test))]
+impl<'a, T: Ord> Ord for &'a T {
+    #[inline]
+    fn lt(&self, other: & &'a T) -> bool {
+        *(*self) < *(*other)
+    }
+    #[inline]
+    fn le(&self, other: & &'a T) -> bool {
+        *(*self) <= *(*other)
+    }
+    #[inline]
+    fn ge(&self, other: & &'a T) -> bool {
+        *(*self) >= *(*other)
+    }
+    #[inline]
+    fn gt(&self, other: & &'a T) -> bool {
+        *(*self) > *(*other)
+    }
+}
+
+#[cfg(not(test))]
+impl<'a, T: TotalOrd> TotalOrd for &'a T {
+    #[inline]
+    fn cmp(&self, other: & &'a T) -> Ordering { (**self).cmp(*other) }
+}
+
+#[cfg(not(test))]
+impl<'a, T: TotalEq> TotalEq for &'a T {
+    #[inline]
+    fn equals(&self, other: & &'a T) -> bool { (**self).equals(*other) }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::ref_eq;
+
+    #[test]
+    fn test_ref_eq() {
+        let x = 1;
+        let y = 1;
+
+        assert!(ref_eq(&x, &x));
+        assert!(!ref_eq(&x, &y));
+    }
+}