ParseTree will not work with ruby 1.9. Why?

Question

As per this parsetree will not work in ruby 1.9 . I do not have computer science background but have been programming for a few years. Can someone explain in a little extra detail why parsetree will not work in ruby 1.9.

Answer 1

ParseTree appears to be dead due to some changes internally to Ruby 1.9, as per this link: http://blog.zenspider.com/2009/04/parsetree-eol.html

Though, it may be that some people will come up with some workarounds for part of it.

Answer 2

The ruby 1.8 interpreter constructed and then walked over an abstract syntax tree, whereas the ruby 1.9 interpreter is bytecode based. Therefore there is no AST available at runtime for parsetree to work with.