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

1 files changed, 2 insertions, 6 deletions

diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index 40f1964bc9c..84cc49192ed 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -307,7 +307,7 @@ pub fn filemap_to_tts(sess: @mut ParseSess, filemap: @FileMap)
     // it appears to me that the cfg doesn't matter here... indeed,
     // parsing tt's probably shouldn't require a parser at all.
     let cfg = ~[];
-    let srdr = lexer::new_string_reader(copy sess.span_diagnostic, filemap);
+    let srdr = lexer::new_string_reader(sess.span_diagnostic, filemap);
     let p1 = Parser(sess, cfg, srdr as @reader);
     p1.parse_all_token_trees()
 }
@@ -316,11 +316,7 @@ pub fn filemap_to_tts(sess: @mut ParseSess, filemap: @FileMap)
 pub fn tts_to_parser(sess: @mut ParseSess,
                      tts: ~[ast::token_tree],
                      cfg: ast::crate_cfg) -> Parser {
-    let trdr = lexer::new_tt_reader(
-        copy sess.span_diagnostic,
-        None,
-        tts
-    );
+    let trdr = lexer::new_tt_reader(sess.span_diagnostic, None, tts);
     Parser(sess, cfg, trdr as @reader)
 }