From: Dominik Bathon <dbatml@...>
Date: 2006-09-25T07:36:21+09:00
Subject: Re: [ANN] ParseTree 1.5.0 Released

On Sun, 24 Sep 2006 22:02:25 +0200, Ryan Davis <ryand-ruby@zenspider.com>  
wrote:

> ParseTree version 1.5.0 has been released!

[snip]

> ** FEATURES/PROBLEMS:
>
> + Uses RubyInline, so it just drops in.

There seems to be a problem with RubyInline's strip_comments(). I'm not  
sure what the exact problem is, but it converts

   case NODE_LAMBDA:
     puts("no worky in 1.9 yet");
     break;
#{if_version :<, "1.9", "#endif"}

   // Nodes we found but have yet to decypher
   // I think these are all runtime only... not positive but...
   case NODE_MEMO:               // enum.c zip
   case NODE_CREF:

to

   case NODE_LAMBDA:
     puts("no worky in 1.9 yet");
     break;
#endif  case NODE_MEMO:  case NODE_CREF:

Which obviously won't compile.

(Tested on ruby 1.8.4 (2005-12-24) [i686-linux] and ruby 1.8.5  
(2006-08-25) [i686-linux], RubyInline-3.6.0, everything installed using  
gems)

[snip]

> Changes:
>
> + 5 minor enhancements:
> 	Added parse_tree_audit.
> 	Added reporting of unsupported nodes that have processors.
> 	YAY! class method support! generated as :"self.blah"
> 	Add parse_tree_for_string.

You made a mistake when copying the code from RubyNode:

You always have to set ruby_eval_tree_begin to 0 (in 1.8), otherwise the  
code in BEGIN blocks will be executed the next time eval is called (which  
is immediatly in irb):

$ ruby
require "parse_tree"
p ParseTree.new.parse_tree_for_string("BEGIN { puts 'evil' }; puts  
'hello'")
puts "before eval"
p eval("'eval'")
^D
[[:fcall, :puts, [:array, [:str, "hello"]]]]
before eval
evil
"eval"

> 	Converted Rakefile+gemspec to Hoe-based Rakefile.
> + 6 bug fixes:
> 	Did some preliminary work on 1.9 compatibility.
> 	Fixed tests for some changes/clarifications.
> 	Fixed resbody: should have nil exceptions list when no exception  
> rescued.
> 	Fixed op_asgn1 and op_asgn2.
> 	Fixed incompatibility with new inline changes.
> 	Fixed VALUE decl in parse_tree.rb

There have been changes to NODE_ALIAS and NODE_VALIAS in 1.8.5:

$ irb -r parse_tree
>> ParseTree.new.parse_tree_for_string("class A; alias a b; end")
/home/dba/i/ruby-1.8.5/lib/ruby/1.8/irb.rb:298: [BUG] Segmentation fault
ruby 1.8.5 (2006-08-25) [i686-linux]

$ ruby -ve 'require "parse_tree"; p  
ParseTree.new.parse_tree_for_string("class A; alias $a $b; end")'
ruby 1.8.4 (2005-12-24) [i686-linux]
[[:class, :A, [:scope, [:valias, :$b, :$a]]]]

$ ruby -ve 'require "parse_tree"; p  
ParseTree.new.parse_tree_for_string("class A; alias $a $b; end")'
ruby 1.8.5 (2006-08-25) [i686-linux]
[[:class, :A, [:scope, [:valias, :$a, :$b]]]]


Dominik