librustc: Add a lint mode for unnecessary `copy` and remove a bunch of them.

2 files changed, 4 insertions, 3 deletions

diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index a2e3d7bfeca..6b3ce1c9a2f 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -53,8 +53,9 @@ pub fn add_new_extension(cx: @ExtCtxt,
 
 
     // Parse the macro_rules! invocation (`none` is for no interpolations):
-    let arg_reader = new_tt_reader(copy cx.parse_sess().span_diagnostic,
-                                   None, copy arg);
+    let arg_reader = new_tt_reader(cx.parse_sess().span_diagnostic,
+                                   None,
+                                   copy arg);
     let argument_map = parse_or_else(cx.parse_sess(),
                                      cx.cfg(),
                                      arg_reader as @reader,
diff --git a/src/libsyntax/ext/tt/transcribe.rs b/src/libsyntax/ext/tt/transcribe.rs
index 92feaa154fe..94ecff178ea 100644
--- a/src/libsyntax/ext/tt/transcribe.rs
+++ b/src/libsyntax/ext/tt/transcribe.rs
@@ -285,7 +285,7 @@ pub fn tt_next_token(r: &mut TtReader) -> TokenAndSpan {
               }
               matched_seq(*) => {
                 r.sp_diag.span_fatal(
-                    copy r.cur_span, /* blame the macro writer */
+                    r.cur_span, /* blame the macro writer */
                     fmt!("variable '%s' is still repeating at this depth",
                          ident_to_str(&ident)));
               }