[ANN] ParseTree 2.1.0 Released

[Ryan Davis]

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/>