syntax: indicate an error when a macro ignores trailing tokens.

That is, only a single expression or item gets parsed, so if there are
any extra tokens (e.g. the start of another item/expression) the user
should be told, rather than silently dropping them.

An example:

    macro_rules! foo {
        () => {
            println("hi");
            println("bye);
        }
    }

would expand to just `println("hi")`, which is almost certainly not
what the programmer wanted.

Fixes #8012.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/ext/deriving/cmp/eq.rs b/src/libsyntax/ext/deriving/cmp/eq.rs
index d147875d5e1..468e3e5e7f2 100644
--- a/src/libsyntax/ext/deriving/cmp/eq.rs
+++ b/src/libsyntax/ext/deriving/cmp/eq.rs
@@ -39,7 +39,7 @@ pub fn expand_deriving_eq(cx: @ExtCtxt,
                 ret_ty: Literal(Path::new(~["bool"])),
                 const_nonmatching: true,
                 combine_substructure: $f
-            },
+            }
         }
     );