add dumb comments

diff --git a/src/l1/machine.rs b/src/l1/machine.rs
index c1bdd375fdd8c138df9c59985d6a3d04405551a4..725d0f89d0e6352ee9e53e98e6446e8455079c0e 100644 (file)
--- a/src/l1/machine.rs
+++ b/src/l1/machine.rs
@@ -182,6 +182,8 @@ impl Machine {
         match instr {
             &QueryInstruction::Call(ref name, arity) => {
                 // why is Option<&T> not Deref?!?!?
+                // is it because if the value is None, there's nothing to
+                // dereference?
                 let compiled_fact_index =
                     self.code_dir.get(&(name.clone(), arity))
                         .map(|index| *index);