std: Bring back f32::from_str_radix as an unstable API

This API was exercised in a few tests and mirrors the `from_str_radix`
functionality of the integer types.

7 files changed, 9 insertions, 25 deletions

diff --git a/src/test/bench/noise.rs b/src/test/bench/noise.rs
index 530c499f5fd..efbb5dfb549 100644
--- a/src/test/bench/noise.rs
+++ b/src/test/bench/noise.rs
@@ -14,7 +14,6 @@
 #![feature(rand, core)]
 
 use std::f32::consts::PI;
-use std::num::Float;
 use std::__rand::{Rng, thread_rng};
 
 #[derive(Copy, Clone)]
diff --git a/src/test/bench/shootout-binarytrees.rs b/src/test/bench/shootout-binarytrees.rs
index 61fe6593dc3..c576eea3602 100644
--- a/src/test/bench/shootout-binarytrees.rs
+++ b/src/test/bench/shootout-binarytrees.rs
@@ -109,8 +109,7 @@ fn main() {
     let long_lived_tree = bottom_up_tree(&long_lived_arena, 0, max_depth);
 
     let messages = (min_depth..max_depth + 1).step_by(2).map(|depth| {
-        use std::num::Int;
-        let iterations = 2.pow((max_depth - depth + min_depth) as u32);
+        let iterations = 2i32.pow((max_depth - depth + min_depth) as u32);
         thread::spawn(move || inner(depth, iterations))
     }).collect::<Vec<_>>();
 
diff --git a/src/test/bench/shootout-fasta.rs b/src/test/bench/shootout-fasta.rs
index 0474cfb6fc8..accf525b4e6 100644
--- a/src/test/bench/shootout-fasta.rs
+++ b/src/test/bench/shootout-fasta.rs
@@ -43,7 +43,6 @@ use std::env;
 use std::fs::File;
 use std::io::{self, BufWriter};
 use std::io::prelude::*;
-use std::num::Float;
 
 const LINE_LENGTH: usize = 60;
 const IM: u32 = 139968;
diff --git a/src/test/bench/shootout-nbody.rs b/src/test/bench/shootout-nbody.rs
index de7fb737958..368dbbb931c 100644
--- a/src/test/bench/shootout-nbody.rs
+++ b/src/test/bench/shootout-nbody.rs
@@ -38,9 +38,7 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#![feature(core)]
-
-use std::num::Float;
+use std::mem;
 
 const PI: f64 = 3.141592653589793;
 const SOLAR_MASS: f64 = 4.0 * PI * PI;
@@ -193,16 +191,9 @@ fn main() {
 /// longer contain the mutable reference. This is a safe operation because the
 /// two mutable borrows are entirely disjoint.
 fn shift_mut_ref<'a, T>(r: &mut &'a mut [T]) -> Option<&'a mut T> {
-    use std::mem;
-    use std::raw::Repr;
-
-    if r.is_empty() { return None }
-    unsafe {
-        let mut raw = r.repr();
-        let ret = raw.data as *mut T;
-        raw.data = raw.data.offset(1);
-        raw.len -= 1;
-        *r = mem::transmute(raw);
-        Some({ &mut *ret })
-    }
+    let res = mem::replace(r, &mut []);
+    if res.is_empty() { return None }
+    let (a, b) = res.split_at_mut(1);
+    *r = b;
+    Some(&mut a[0])
 }
diff --git a/src/test/bench/shootout-spectralnorm.rs b/src/test/bench/shootout-spectralnorm.rs
index b0e8c395673..0fa22abde3c 100644
--- a/src/test/bench/shootout-spectralnorm.rs
+++ b/src/test/bench/shootout-spectralnorm.rs
@@ -46,7 +46,6 @@
 use std::iter::repeat;
 use std::thread;
 use std::mem;
-use std::num::Float;
 use std::os;
 use std::env;
 use std::raw::Repr;
diff --git a/src/test/bench/sudoku.rs b/src/test/bench/sudoku.rs
index 3913de3a3f9..16742f0a6e1 100644
--- a/src/test/bench/sudoku.rs
+++ b/src/test/bench/sudoku.rs
@@ -16,7 +16,6 @@
 use std::io::prelude::*;
 use std::io;
 use std::iter::repeat;
-use std::num::Int;
 use std::env;
 
 // Computes a single solution to a given 9x9 sudoku
diff --git a/src/test/pretty/default-trait-impl.rs b/src/test/pretty/default-trait-impl.rs
index 509bee9def2..a5246b9300c 100644
--- a/src/test/pretty/default-trait-impl.rs
+++ b/src/test/pretty/default-trait-impl.rs
@@ -8,13 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(optin_builtin_traits, core)]
+#![feature(optin_builtin_traits)]
 
 // pp-exact
 
-use std::marker::MarkerTrait;
-
-trait MyTrait: MarkerTrait { }
+trait MyTrait { }
 
 impl MyTrait for .. { }