This post originated from an RSS feed registered with Ruby Buzz by Ryan Davis. Original Post: ParseTree version 2.0.1 has been released! Feed Title: Polishing Ruby Feed URL: http://blog.zenspider.com/index.rdf Feed Description: Musings on Ruby and the Ruby Community... Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Ryan Davis Latest Posts From Polishing Ruby

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#parsetreefor_string lets you parse arbitrary strings of ruby.
• Includes parsetreeshow, which lets you quickly snoop code.
  • echo "1+1" | parsetreeshow -f for quick snippet output.
• Includes parsetreeabc, which lets you get abc metrics on code.
  • abc metrics = numbers of assignments, branches, and calls.
  • whitespace independent metric for method complexity.
• Includes parsetreedeps, which shows you basic class level dependencies.
• Does not work on the core classes, as they are not ruby (yet).

Changes:

• 1 major enhancement:

  • Rewrote parsetreeshow to use parsetreefor_string.
  • parsetreeshow adds -n=node filtering -u unifying, and -s structure-only.
  • parsetreeshow no longer needs -f

• 4 minor enhancements:

  • Added context stack to SexpProcessor! YAY!!!
  • Enforce type to be symbol in SexpProcessor... just makes life easier.
  • Processing style change mode to UnifiedRuby. Prefer no rescues.
  • Sexp#structure is no longer destructive.

• 4 bug fixes:

  • Added 1.8.4 compatibility fix.
  • Added args lifting in :defs in UnifiedRuby.
  • Fixed unifying argscat, splat, and a couple other oddities.
  • Added process_call to UnifiedRuby sigh I'm a tard.

• http://www.zenspider.com/ZSS/Products/ParseTree/