Very early work in progress. Still learning Swift.
Updated to match changes to PHP version. Trying to make visitor generic but strict.
More work in progress.
Updating visitor protocol based on the java version changes.
Could not get generic protocol typealias's to work, except for NodeProtocol.
Added xcode project to repo for easier syncing.
Updated doc comments to use triple slashes.
I think i got the generic visitors working.
Removing some unneeded generic methods.
Fixing things.
Still having issues with Evaluator implementing the generic visitor protocols.
Evaluator visitor seems stable now. Had to remove Node protocol accept() method. Finish porting renderer visitor.
Got visitors/AST nodes working generically.
Implemented ListParser
Uncommented evaluator code
Merge pull request #3 from jmalloc/james

Got visitors/AST nodes working generically.
Re-added some doc comments. Started porting some more classes.
Finished EvaluationResult, commented out other half implemented classes with compile errors.
Don't need parenthesis for methods that take a single trailing closure.
More work on Evaluator.