Have floating point functions take their parameters by value.

Make all of the methods in `std::num::Float` take `self` and their other parameters by value.

Some of the `Float` methods took their parameters by value, and others took them by reference. This standardises them to one convention. The `Float` trait is intended for the built in IEEE 754 numbers only so we don't have to worry about the trait serving types of larger sizes.

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/num/strconv.rs b/src/libstd/num/strconv.rs
index 73dfbdd088e..bb2fd2a4e25 100644
--- a/src/libstd/num/strconv.rs
+++ b/src/libstd/num/strconv.rs
@@ -310,7 +310,7 @@ pub fn float_to_str_bytes_common<T:NumCast+Zero+One+Eq+Ord+Float+
                     ExpNone => unreachable!()
                 };
 
-                (num / exp_base.powf(&exp), cast::<T, i32>(exp).unwrap())
+                (num / exp_base.powf(exp), cast::<T, i32>(exp).unwrap())
             }
         }
     };