3.5.4 OO languages: The Full story

This week, you will complete your OO story generation:

• Add the cache functionality from 1/d
• Code up the entire scifi grammar and generate a complete story.

Usual Stuff

Setup

Perform the weekly set up instructions for project 2, homework d If you find that you are missing any files, copy them over from 2/c.

CAUTION: do not cp 2/c/* as that may copy the magic .svn directory into 2/d (thus messing up your repo). Copy them over the old-fashioned way (e.g. cp ../c/gold.lisp .) then svn add them.

What to Hand In

Report:

• All the lisp functions you’ve written;
• The ‘repl.txt’ coming from your REPL session where you run (main), this time with 10 samples of your sci fi stories with the "dramatic chords" you code below;
• Your svn log showing all the commits generated as part of this week’s homework;
• A file containing your deftests for all parts of the following. At least five tests per team member spread out if files with member names.

What to do

• Add a "$cache" variable and a "$cachep" flag to *rule* such that if the phrase is referenced more than once, the first time you "act" to find the rewrite and add it to the "$cache". Subsequently, you just return the contents of "$cache". Note that:
  • In project1, this special case meant changing some global procedure. Here, the change is localized to a leaf class.
  • You’re probably going to need one "if" statement in *rule* to hand this caching.
• Using the 2/c code, add side-effects to a third of the atoms in the story.
• Code up the entire scifi story as instances of sub-classes of *phrase*.
• Generate 10 stories, at random, with caching and side effects.
• (Optional) sell your masterpiece to Spielberg and cut your old lecturer in for his usual 10%.

This document was generated on April 19, 2011 using texi2html 5.0.