Evolutionary language transformation. Fork of igorw's initial work.

Read the related blog post.

Backport existing PHP features to previous versions through AST compilation. Inspired by lisp macros. Using the incredible nikic/PHP-Parser.

• Binary number format
• Closure rebinding

Edge cases:

• Calling private methods from within closure
• Ensure $that gets passed to nested closures

There needs to be a strategy for managing state. A trait transformer needs to keep track of the traits it found. That is currently missing.

There should be a way to preserve existing code formatting, especially for code that wasn't actually modified. Instead of pretty-printing everything, only changed parts of the AST should be changed in source. Three-way-diff may help with this.

Is there any way to do something like source maps to refer to the original line numbers, so that code remains at all debuggable?