1 files changed, 20 insertions, 0 deletions
diff --git a/src/libcore/num/float_macros.rs b/src/libcore/num/float_macros.rs
new file mode 100644
index 00000000000..3e403219a4f
--- /dev/null
+++ b/src/libcore/num/float_macros.rs
@@ -0,0 +1,20 @@
+// Copyright 2014 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.
+
+#![macro_escape]
+#![doc(hidden)]
+
+macro_rules! assert_approx_eq(
+    ($a:expr, $b:expr) => ({
+        let (a, b) = (&$a, &$b);
+        assert!((*a - *b).abs() < 1.0e-6,
+                "{} is not approximately equal to {}", *a, *b);
+    })
+)