* parse.y [ripper]: on__scan event removed.

* parse.y [ripper]: event name is changed: on__XXX -> on_XXX.
* ext/ripper/eventids2.c: ditto.
* ext/ripper/ripper.rb.in: ditto.
* ext/ripper/lib/ripper.rb: sync with ripper.rb.in.
* ext/ripper/lib/ripper/tokenizer: ditto.
* ext/ripper/lib/ripper/filter: new file.
* sample/ripper/colorize.rb: new file.
* sample/ripper/strip-comment.rb: new file.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 49 insertions, 0 deletions

diff --git a/sample/ripper/colorize.rb b/sample/ripper/colorize.rb
new file mode 100644
index 0000000000..505e757013
--- /dev/null
+++ b/sample/ripper/colorize.rb
@@ -0,0 +1,30 @@
+require 'ripper/filter'
+
+class ColorizeFilter < Ripper::Filter
+  def on_default(event, tok, f)
+    f << escape(tok)
+  end
+
+  def on_comment(tok, f)
+    f << %Q[<span class="comment">#{escape(tok)}</span>]
+  end
+
+  def on_tstring_content(tok, f)
+    f << %Q[<span class="string">#{escape(tok)}</span>]
+  end
+
+  ESC = {
+    '&' => '&amp;',
+    '<' => '&lt;',
+    '>' => '&gt;'
+  }
+
+  def escape(str)
+    tbl = ESC
+    str.gsub(/[&<>]/) {|ch| tbl[ch] }
+  end
+end
+
+if $0 == __FILE__
+  ColorizeFilter.new(ARGF).parse($stdout)
+end
diff --git a/sample/ripper/strip-comment.rb b/sample/ripper/strip-comment.rb
new file mode 100644
index 0000000000..bd26b6a377
--- /dev/null
+++ b/sample/ripper/strip-comment.rb
@@ -0,0 +1,19 @@
+# $Id$
+
+require 'ripper/filter'
+
+class CommentStripper < Ripper::Filter
+  def CommentStripper.strip(src)
+    new(src).parse(nil)
+  end
+
+  def on_default(event, token, data)
+    print token
+  end
+
+  def on_comment(token, data)
+    puts
+  end
+end
+
+CommentStripper.strip(ARGF)