collections: Deprecate shift/unshift

Use insert/remove instead.

src/compiletest/runtest.rs

@@ -1178,7 +1178,7 @@ fn make_run_args(config: &Config, props: &TestProps, testfile: &Path) ->
     // Add the arguments in the run_flags directive
     args.push_all_move(split_maybe_args(&props.run_flags));
 
-    let prog = args.shift().unwrap();
+    let prog = args.remove(0).unwrap();
     return ProcArgs {
         prog: prog,
         args: args,

src/libcollections/vec.rs

@@ -987,6 +987,7 @@ impl<T> Vec<T> {
     /// assert_eq!(vec, vec![4, 1, 2, 3]);
     /// ```
     #[inline]
+    #[deprecated = "use insert(0, ...)"]
     pub fn unshift(&mut self, element: T) {
         self.insert(0, element)
     }
@@ -1007,6 +1008,7 @@ impl<T> Vec<T> {
     /// assert_eq!(vec, vec![2, 3]);
     /// ```
     #[inline]
+    #[deprecated = "use remove(0)"]
     pub fn shift(&mut self) -> Option<T> {
         self.remove(0)
     }

src/libregex/parse.rs

@@ -998,7 +998,7 @@ fn concat_flatten(x: Ast, y: Ast) -> Ast {
     match (x, y) {
         (Cat(mut xs), Cat(ys)) => { xs.push_all_move(ys); Cat(xs) }
         (Cat(mut xs), ast) => { xs.push(ast); Cat(xs) }
-        (ast, Cat(mut xs)) => { xs.unshift(ast); Cat(xs) }
+        (ast, Cat(mut xs)) => { xs.insert(0, ast); Cat(xs) }
         (ast1, ast2) => Cat(vec!(ast1, ast2)),
     }
 }

src/librustdoc/lib.rs

@@ -361,7 +361,7 @@ fn rust_input(cratefile: &str, externs: core::Externs, matches: &getopts::Matche
     }
     if default_passes {
         for name in DEFAULT_PASSES.iter().rev() {
-            passes.unshift(name.to_string());
+            passes.insert(0, name.to_string());
         }
     }
 

src/librustdoc/markdown.rs

@@ -136,7 +136,7 @@ pub fn test(input: &str, libs: HashSet<Path>, externs: core::Externs,
 
     let mut collector = Collector::new(input.to_string(), libs, externs, true);
     find_testable_code(input_str.as_slice(), &mut collector);
-    test_args.unshift("rustdoctest".to_string());
+    test_args.insert(0, "rustdoctest".to_string());
     testing::test_main(test_args.as_slice(), collector.tests);
     0
 }

src/librustdoc/test.rs

@@ -97,7 +97,7 @@ pub fn run(input: &str,
                                        false);
     collector.fold_crate(krate);
 
-    test_args.unshift("rustdoctest".to_string());
+    test_args.insert(0, "rustdoctest".to_string());
 
     testing::test_main(test_args.as_slice(),
                        collector.tests.move_iter().collect());

src/librustuv/access.rs

@@ -114,7 +114,7 @@ impl<'a> Drop for Guard<'a> {
             mem::transmute(self.access.inner.get())
         };
 
-        match inner.queue.shift() {
+        match inner.queue.remove(0) {
             // Here we have found a task that was waiting for access, and we
             // current have the "access lock" we need to relinquish access to
             // this sleeping task.

src/libterm/terminfo/parm.rs

@@ -514,12 +514,12 @@ fn format(val: Param, op: FormatOp, flags: Flags) -> Result<Vec<u8> ,String> {
                 FormatDigit => {
                     if flags.space && !(s[0] == '-' as u8 ||
                                         s[0] == '+' as u8) {
-                        s.unshift(' ' as u8);
+                        s.insert(0, ' ' as u8);
                     }
                 }
                 FormatOctal => {
                     if flags.alternate && s[0] != '0' as u8 {
-                        s.unshift('0' as u8);
+                        s.insert(0, '0' as u8);
                     }
                 }
                 FormatHex => {