std: remove unused 'mut' variables

Author: alexcrichton

src/libstd/bitv.rs

@@ -891,7 +891,7 @@ mod tests {
     #[test]
     fn test_0_elements() {
         let mut act;
-        let mut exp;
+        let exp;
         act = Bitv::new(0u, false);
         exp = vec::from_elem::<uint>(0u, 0u);
         assert!(act.eq_vec(exp));

src/libstd/deque.rs

@@ -113,7 +113,7 @@ pub impl<T> Deque<T> {
     ///
     /// Fails if the deque is empty
     fn pop_front(&mut self) -> T {
-        let mut result = self.elts[self.lo].swap_unwrap();
+        let result = self.elts[self.lo].swap_unwrap();
         self.lo = (self.lo + 1u) % self.elts.len();
         self.nelts -= 1u;
         result
@@ -126,7 +126,7 @@ pub impl<T> Deque<T> {
         if self.hi == 0u {
             self.hi = self.elts.len() - 1u;
         } else { self.hi -= 1u; }
-        let mut result = self.elts[self.hi].swap_unwrap();
+        let result = self.elts[self.hi].swap_unwrap();
         self.elts[self.hi] = None;
         self.nelts -= 1u;
         result
@@ -204,7 +204,7 @@ pub impl<T> Deque<T> {
     ///
     /// Fails if the deque is empty
     fn pop_front(&mut self) -> T {
-        let mut result = self.elts[self.lo].swap_unwrap();
+        let result = self.elts[self.lo].swap_unwrap();
         self.lo = (self.lo + 1u) % self.elts.len();
         self.nelts -= 1u;
         result
@@ -217,7 +217,7 @@ pub impl<T> Deque<T> {
         if self.hi == 0u {
             self.hi = self.elts.len() - 1u;
         } else { self.hi -= 1u; }
-        let mut result = self.elts[self.hi].swap_unwrap();
+        let result = self.elts[self.hi].swap_unwrap();
         self.elts[self.hi] = None;
         self.nelts -= 1u;
         result

src/libstd/dlist.rs

@@ -220,7 +220,7 @@ pub impl<T> DList<T> {
      * node. O(1).
      */
     fn push_head_n(@mut self, data: T) -> @mut DListNode<T> {
-        let mut nobe = DList::new_link(data);
+        let nobe = DList::new_link(data);
         self.add_head(nobe);
         nobe.get()
     }
@@ -233,7 +233,7 @@ pub impl<T> DList<T> {
      * node. O(1).
      */
     fn push_n(@mut self, data: T) -> @mut DListNode<T> {
-        let mut nobe = DList::new_link(data);
+        let nobe = DList::new_link(data);
         self.add_tail(nobe);
         nobe.get()
     }
@@ -263,7 +263,7 @@ pub impl<T> DList<T> {
         data: T,
         neighbour: @mut DListNode<T>
     ) -> @mut DListNode<T> {
-        let mut nobe = DList::new_link(data);
+        let nobe = DList::new_link(data);
         self.insert_left(nobe, neighbour);
         nobe.get()
     }
@@ -293,7 +293,7 @@ pub impl<T> DList<T> {
         data: T,
         neighbour: @mut DListNode<T>
     ) -> @mut DListNode<T> {
-        let mut nobe = DList::new_link(data);
+        let nobe = DList::new_link(data);
         self.insert_right(neighbour, nobe);
         nobe.get()
     }

src/libstd/num/rational.rs

@@ -60,7 +60,7 @@ impl<T: Copy + Div<T,T> + Modulo<T,T> + Neg<T> + Zero + One + Ord + Eq>
 
     /// Put self into lowest terms, with denom > 0.
     fn reduce(&mut self) {
-        let mut g : T = gcd(self.numer, self.denom);
+        let g : T = gcd(self.numer, self.denom);
 
         self.numer /= g;
         self.denom /= g;
@@ -508,4 +508,4 @@ mod test {
             test(s);
         }
     }
-}
+}

src/libstd/rope.rs

@@ -838,8 +838,7 @@ pub mod node {
                   option::None => break,
                   option::Some(x) => {
                     //FIXME (#2744): Replace with memcpy or something similar
-                    let mut local_buf: ~[u8] =
-                        cast::transmute(*x.content);
+                    let local_buf: ~[u8] = cast::transmute(*x.content);
                     let mut i = x.byte_offset;
                     while i < x.byte_len {
                         buf[offset] = local_buf[i];
@@ -1156,7 +1155,7 @@ pub mod node {
         }
 
         pub fn empty() -> T {
-            let mut stack : ~[@Node] = ~[];
+            let stack : ~[@Node] = ~[];
             T { stack: stack, stackpos: -1 }
         }
 

src/libstd/sha1.rs

@@ -93,7 +93,7 @@ pub fn sha1() -> @Sha1 {
         assert!((vec::len(st.h) == digest_buf_len));
         assert!((vec::uniq_len(st.work_buf) == work_buf_len));
         let mut t: int; // Loop counter
-        let mut w = st.work_buf;
+        let w = st.work_buf;
 
         // Initialize the first 16 words of the vector w
         t = 0;
@@ -260,7 +260,7 @@ pub fn sha1() -> @Sha1 {
             return s;
         }
     }
-    let mut st = Sha1State {
+    let st = Sha1State {
          h: vec::from_elem(digest_buf_len, 0u32),
          len_low: 0u32,
          len_high: 0u32,

src/libstd/sort.rs

@@ -239,7 +239,7 @@ fn binarysort<T:Copy + Ord>(array: &mut [T], start: uint) {
             }
         }
         assert!(left == right);
-        let mut n = start-left;
+        let n = start-left;
 
         copy_vec(array, left+1, array, left, n);
         array[left] = pivot;
@@ -416,7 +416,7 @@ impl<T:Copy + Ord> MergeState<T> {
     }
 
     fn merge_at(&mut self, n: uint, array: &mut [T]) {
-        let mut size = self.runs.len();
+        let size = self.runs.len();
         assert!(size >= 2);
         assert!(n == size-2 || n == size-3);
 

src/libstd/test.rs

@@ -427,8 +427,7 @@ fn run_tests(opts: &TestOpts,
     let filtered_descs = filtered_tests.map(|t| t.desc);
     callback(TeFiltered(filtered_descs));
 
-    let mut (filtered_tests,
-             filtered_benchs) =
+    let (filtered_tests, filtered_benchs) =
         do vec::partition(filtered_tests) |e| {
         match e.testfn {
             StaticTestFn(_) | DynTestFn(_) => true,

src/libstd/time.rs

@@ -147,7 +147,7 @@ pub fn empty_tm() -> Tm {
 /// Returns the specified time in UTC
 pub fn at_utc(clock: Timespec) -> Tm {
     unsafe {
-        let mut Timespec { sec, nsec } = clock;
+        let Timespec { sec, nsec } = clock;
         let mut tm = empty_tm();
         rustrt::rust_gmtime(sec, nsec, &mut tm);
         tm
@@ -162,7 +162,7 @@ pub fn now_utc() -> Tm {
 /// Returns the specified time in the local timezone
 pub fn at(clock: Timespec) -> Tm {
     unsafe {
-        let mut Timespec { sec, nsec } = clock;
+        let Timespec { sec, nsec } = clock;
         let mut tm = empty_tm();
         rustrt::rust_localtime(sec, nsec, &mut tm);
         tm