From: Mark Thom <markjordanthom@gmail.com>
Date: Fri, 3 Feb 2017 07:49:16 +0000 (-0700)
Subject: add dumb comments
X-Git-Tag: v0.8.110~778
X-Git-Url: https://git.sagredo.dev/?a=commitdiff_plain;h=refs%2Fremotes%2Forigin%2Fl1_final;p=scryer-prolog.git

add dumb comments
---

diff --git a/src/l1/machine.rs b/src/l1/machine.rs
index c1bdd375..725d0f89 100644
--- 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);