tree be241b4f0ad628c525528f0b73aabb494b36f230
parent f9b1cf451ceedfdcc3e6dd3c3260d85c0f277423
author Shawn O. Pearce <sop@google.com> 1308334477 -0700
committer Shawn O. Pearce <sop@google.com> 1308339628 -0700

Simplify the main execution loop of the interpreter

Made the code easier to follow, and handle halt(N) as normally
happens in a Prolog implementation like SWI-Prolog.