Better Compiler Interface & Shared Compiler Objects (#156)

* Add leader and follower node assignment to test

* Update the compilers interface

* Fix Cargo machete

* Add reporting back to the compilers

* Remove the static testing target from the report

* Uncomment instrument macro

* Switch to a for loop when reporting cases

* Update compilers to use interior caching

* Update tests stream func

* Fix tests

crates/common/src/iterators/either_iter.rs

@@ -0,0 +1,21 @@
+/// An iterator that could be either of two iterators.
+#[derive(Clone, Debug)]
+pub enum EitherIter<A, B> {
+    A(A),
+    B(B),
+}
+
+impl<A, B, T> Iterator for EitherIter<A, B>
+where
+    A: Iterator<Item = T>,
+    B: Iterator<Item = T>,
+{
+    type Item = T;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        match self {
+            EitherIter::A(iter) => iter.next(),
+            EitherIter::B(iter) => iter.next(),
+        }
+    }
+}

crates/common/src/iterators/mod.rs

@@ -1,3 +1,5 @@
+mod either_iter;
 mod files_with_extension_iterator;
 
+pub use either_iter::*;
 pub use files_with_extension_iterator::*;