Improve readability in a few sorts

2 files changed, 3 insertions, 7 deletions

diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index 2100ceea228..000025c49a6 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -1229,10 +1229,7 @@ Available lint options:
     fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
                         -> Vec<(&'static str, Vec<lint::LintId>)> {
         let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
-        lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
-                       &(y, _): &(&'static str, Vec<lint::LintId>)| {
-            x.cmp(y)
-        });
+        lints.sort_by_key(|ref l| l.0);
         lints
     }
 
diff --git a/src/librustc_driver/profile/trace.rs b/src/librustc_driver/profile/trace.rs
index 5f10c56e8e2..4aaf5eb47f6 100644
--- a/src/librustc_driver/profile/trace.rs
+++ b/src/librustc_driver/profile/trace.rs
@@ -202,14 +202,13 @@ fn compute_counts_rec(counts: &mut HashMap<String,QueryMetric>, traces: &Vec<Rec
 
 pub fn write_counts(count_file: &mut File, counts: &mut HashMap<String,QueryMetric>) {
     use rustc::util::common::duration_to_secs_str;
-    use std::cmp::Ordering;
+    use std::cmp::Reverse;
 
     let mut data = vec![];
     for (ref cons, ref qm) in counts.iter() {
         data.push((cons.clone(), qm.count.clone(), qm.dur_total.clone(), qm.dur_self.clone()));
     };
-    data.sort_by(|&(_,_,_,self1),&(_,_,_,self2)|
-                 if self1 > self2 { Ordering::Less } else { Ordering::Greater } );
+    data.sort_by_key(|&k| Reverse(k.3));
     for (cons, count, dur_total, dur_self) in data {
         write!(count_file, "{}, {}, {}, {}\n",
                cons, count,