From: Ryan Davis <ryand-ruby@...>
Date: 2007-12-23T07:51:45+09:00
Subject: [ANN] ParseTree 2.1.0 Released


ParseTree version 2.1.0 has been released!

* <http://www.zenspider.com/ZSS/Products/ParseTree/>

ParseTree is a C extension (using RubyInline) that extracts the parse
tree for an entire class or a specific method and returns it as a
s-expression (aka sexp) using ruby's arrays, strings, symbols, and
integers.

As an example:

   def conditional1(arg1)
     if arg1 == 0 then
       return 1
     end
     return 0
   end

becomes:

   [:defn,
     :conditional1,
     [:scope,
      [:block,
       [:args, :arg1],
       [:if,
        [:call, [:lvar, :arg1], :==, [:array, [:lit, 0]]],
        [:return, [:lit, 1]],
        nil],
       [:return, [:lit, 0]]]]]

* Uses RubyInline, so it just drops in.
* Includes SexpProcessor and CompositeSexpProcessor.
   * Allows you to write very clean filters.
* Includes UnifiedRuby, allowing you to automatically rewrite ruby  
quirks.
* ParseTree#parse_tree_for_string lets you parse arbitrary strings of  
ruby.
* Includes parse_tree_show, which lets you quickly snoop code.
   * echo "1+1" | parse_tree_show -f for quick snippet output.
* Includes parse_tree_abc, which lets you get abc metrics on code.
   * abc metrics = numbers of assignments, branches, and calls.
   * whitespace independent metric for method complexity.
* Includes parse_tree_deps, which shows you basic class level  
dependencies.
* Does not work on the core classes, as they are not ruby (yet).

Changes:

* 13 minor enhancements:

   * Added (partial) regexp flag support, currently numerical. ugh.
   * Added -a flag to parse_tree_show to turn on newline (all) nodes.
   * Added -r to parse_tree_show for raw arrays instead of sexps.
   * Added Unifier (SexpProcessor) class to unified_ruby.rb.
   * Added a ton of tests while working on ruby_parser.
   * Added ability to tell proc {} (nil arg slot) from proc {||} (0  
arg slot)
   * Added context tracking to rewriting phase... slightly broken.
   * Added evstr support. (I hate evan)
   * Added usage for parse_tree_show.
   * Changed verbose to be true all the time in parse_tree_for_string.
   * Removed process_level from SexpProcessor... just look at context  
size instead.
   * Revamped ParseTree. No more passing around newline. Pass around  
self instead.
   * I'm starting to dislike ruby's AST. It is REALLY inconsistent.

* 6 bug fix:

   * SexpProcessor#assert_type now a bit safer with bad values.
   * Uncovered a bug in ruby (AST changes when -v used), added handler  
code.
   * Fixed NODE_BLOCK and massively simplified in the process.
   * Fixed rewrite_defs to deal with non-block asts.
   * Fixed test/unit hack so it does not die under miniunit.
   * Found a bug in PT where parse_tree_for_string had some shadowed  
variables.

* <http://www.zenspider.com/ZSS/Products/ParseTree/>