ParseTree 3.0.0 Released

ParseTree version 3.0.0 has been released!

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

As an example:

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


[:args, :arg1],
[:call, [:lvar, :arg1], :==, [:array, [:lit, 0]]],
[:return, [:lit, 1]],
[:return, [:lit, 0]]]]]


3.0.0 / 2008-10-22

  • 3 major enhancements:

    • Split out sexp_processor project.
    • ParseTree#process outputs a UnifiedRuby parse tree.
      • Switched all ParseTree tests to RawParseTree tests.
      • Added ParseTree tests.
    • Added UnifiedRuby#process.
  • 28 minor enhancements:

    • PTTC: Added a comprehensive suite of tests for every combo of
      defn args.
    • PTTC: Added a ton of new tests.
    • PTTC: Added extra tests for mri verbose flag testing (horrid
      horrid bug imhfo)
    • PTTC: Don’t generate tests if class has “TestCase” in the class
    • PTTC: Made self.previous more overridable.
    • PTTC: Now all tests that have “mri_verbose_flag” activate $VERBOSE
    • PTTC: Officially added clone_same phase to generate_tests
    • PTTC: Refactored test generation to make subclasses more flexible.
    • PTTC: Refactored to use new add_tests. Much much cleaner.
    • PTTC: Removed Unique from PTTC… subclasses need to deal with this
    • PTTC: Removed some stupid tests.
    • PTTC: Renamed a bunch of tests to be more uniform.
    • UR: Added rewrite_attrasgn to normalize arg array into arglist.
    • UR: Added rewrite_op_asgn1 to ensure the arglist is an arglist.
    • UR: Flattened resbodies in rescue node.
    • UR: Flattened super and yield args yet, deal with array arg
    • UR: Handle yield(*ary) properly.
    • UR: Nuked argspush.
    • UR: Removed begin node from unified sexps.
    • UR: Removed block from rewritten resbody if only 1 element.
    • UR: Removed dasgn, dasgn_curr, and dvar nodes.
    • UR: Removed s(:block_arg, :block) in favor of :“&block”
    • UR: Rewrote argscat to be a splat inside an array.
    • UR: Rewrote block_pass into arglist of inner call/super.
    • UR: Rewrote call to ALWAYS have an argslist (no more splat as
    • UR: Rewrote rewrite_resbody from scratch… MUUCH cleaner.
    • UR: zarray → array
    • Used Hoe#add_include_dirs to clean up rakefile.
    • Moved PT dependent code from ruby2ruby to here (eg Proc#to_sexp &
  • 2 bug fixes:

    • UR: Fixed a bug with resbody that starts with an lasgn.
    • UR: Fixed args for attrset
    • Fixed export of symbols to work across platforms.


  • [email protected]