Got test cases to pass, after some major surgery

src/test/auxiliary/issue2378a.rs

@@ -8,13 +8,16 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[link (name = "issue2378a")];
+#[crate_type = "lib"];
+
 enum maybe<T> { just(T), nothing }
 
-impl copy> for maybe<T> for methods<T {
-    fn ~[](idx: uint) -> T {
+impl <T:Copy> Index<uint,T> for maybe<T> {
+    fn index(&self, idx: &uint) -> T {
         match self {
-          just(t) { t }
-          nothing { fail!(); }
+            &just(ref t) => copy *t,
+            &nothing => { fail!(); }
         }
     }
 }

src/test/auxiliary/issue2378b.rs

@@ -8,15 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use issue2378a;
+#[link (name = "issue2378b")];
+#[crate_type = "lib"];
+
+extern mod issue2378a;
 
 use issue2378a::maybe;
-use issue2378a::methods;
 
-type two_maybes<T> = {a: maybe<T>, b: maybe<T>};
+struct two_maybes<T> {a: maybe<T>, b: maybe<T>}
 
-impl copy> for two_maybes<T> for methods<T {
-    fn ~[](idx: uint) -> (T, T) {
-        (self.a[idx], self.b[idx])
+impl <T:Copy> Index<uint,(T,T)> for two_maybes<T> {
+    fn index(&self, idx: &uint) -> (T, T) {
+        (self.a[*idx], self.b[*idx])
     }
 }

src/test/run-pass/issue2378c.rs

@@ -8,17 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// xfail-test -- #2378 unfixed 
 // aux-build:issue2378a.rs
 // aux-build:issue2378b.rs
+// xfail-fast - check-fast doesn't understand aux-build
 
-use issue2378a;
-use issue2378b;
+extern mod issue2378a;
+extern mod issue2378b;
 
-use issue2378a::{just, methods};
-use issue2378b::{methods};
+use issue2378a::{just};
+use issue2378b::{two_maybes};
 
 pub fn main() {
-    let x = {a: just(3), b: just(5)};
+    let x = two_maybes{a: just(3), b: just(5)};
     assert!(x[0u] == (3, 5));
 }