add tag v1_8_5_54

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_8_5_54@12952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 61 insertions, 0 deletions

diff --git a/ruby_1_8_5/lib/irb/ext/tracer.rb b/ruby_1_8_5/lib/irb/ext/tracer.rb
new file mode 100644
index 0000000000..8660bfed17
--- /dev/null
+++ b/ruby_1_8_5/lib/irb/ext/tracer.rb
@@ -0,0 +1,61 @@
+#
+#   irb/lib/tracer.rb - 
+#   	$Release Version: 0.9.5$
+#   	$Revision: 1.1.2.1 $
+#   	$Date: 2005/04/19 19:24:58 $
+#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
+#
+# --
+#
+#   
+#
+require "tracer"
+
+module IRB
+
+  # initialize tracing function
+  def IRB.initialize_tracer
+    Tracer.verbose = false
+    Tracer.add_filter {
+      |event, file, line, id, binding, *rests|
+      /^#{Regexp.quote(@CONF[:IRB_LIB_PATH])}/ !~ file and
+	File::basename(file) != "irb.rb"
+    }
+  end
+
+  class Context
+    attr_reader :use_tracer
+    alias use_tracer? use_tracer
+
+    def use_tracer=(opt)
+      if opt
+	Tracer.set_get_line_procs(@irb_path) {
+	  |line_no, *rests|
+	  @io.line(line_no)
+	}
+      elsif !opt && @use_tracer
+	Tracer.off
+      end
+      @use_tracer=opt
+    end
+  end
+
+  class WorkSpace
+    alias __evaluate__ evaluate
+    def evaluate(context, statements, file = nil, line = nil)
+      if context.use_tracer? && file != nil && line != nil
+	Tracer.on 
+	begin
+	  __evaluate__(context, statements, file, line)
+	ensure
+	  Tracer.off
+	end
+      else
+	__evaluate__(context, statements, file || __FILE__, line || __LINE__)
+      end
+    end
+  end
+
+  IRB.initialize_tracer
+end
+