Store items and decls in vecs to preserve input order, index externally. Implement block-local name lookup.

src/comp/util/common.rs

@@ -47,6 +47,15 @@ fn istr(int i) -> str {
     ret _int.to_str(i, 10u);
 }
 
+
+// FIXME: Weird bug. Due to the way we auto-deref + in +=, we can't append a
+// boxed value to a vector-of-boxes using +=.  Best to figure out a way to fix
+// this. Deref-on-demand or something? It's a hazard of the ambiguity between
+// single-element and vector append.
+fn append[T](&vec[T] v, &T t) {
+    v += t;
+}
+
 //
 // Local Variables:
 // mode: rust