Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!feeder.news-service.com!feeds.phibee-telecom.net!talisker.lacave.net!lacave.net!not-for-mail
From: Brian Candler <b.candler@pobox.com>
Newsgroups: comp.lang.ruby
Subject: Re: Generating Functions in Ruby
Date: Thu, 19 May 2011 10:06:32 -0500
Organization: Service de news de lacave.net
Lines: 32
Message-ID: <6607a8ddf9ad5da65d6ca70c12e5ae6c@ruby-forum.com>
References: <5e21af14-befb-406e-b1c3-6758fe1527ab@s14g2000vbi.googlegroups.com>
NNTP-Posting-Host: bristol.highgroove.com
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
X-Trace: talisker.lacave.net 1305817607 23293 65.111.164.187 (19 May 2011 15:06:47 GMT)
X-Complaints-To: abuse@lacave.net
NNTP-Posting-Date: Thu, 19 May 2011 15:06:47 +0000 (UTC)
In-Reply-To: <5e21af14-befb-406e-b1c3-6758fe1527ab@s14g2000vbi.googlegroups.com>
X-Received-From: This message has been automatically forwarded from the ruby-talk mailing list by a gateway at comp.lang.ruby. If it is SPAM, it did not originate at comp.lang.ruby. Please report the original sender, and not us. Thanks! For more details about this gateway, please visit: http://blog.grayproductions.net/categories/the_gateway
X-Mail-Count: 383472
X-Ml-Name: ruby-talk
X-Rubymirror: Yes
X-Ruby-Talk: <6607a8ddf9ad5da65d6ca70c12e5ae6c@ruby-forum.com>
Xref: x330-a1.tempe.blueboxinc.net comp.lang.ruby:4764

Have a look at how ActionView (from Rails) caches its compiled 
templates. It does this by defining methods on a module.

[actionpack/lib/action_view/template.rb]

      def compile(view, mod) #:nodoc:
..
        code  = arity.abs == 1 ? @handler.call(self) : 
@handler.call(self, view)

        source = <<-end_src
          def #{method_name}(local_assigns)
            _old_output_buffer = @output_buffer;#{locals_code};#{code}
          ensure
            @output_buffer = _old_output_buffer
          end
        end_src
..
        begin
          mod.module_eval(source, identifier, 0)
          ObjectSpace.define_finalizer(self, Finalizer[method_name, 
mod])
        rescue Exception => e # errors from template code
          if logger = (view && view.logger)
            logger.debug "ERROR: compiling #{method_name} RAISED #{e}"
            logger.debug "Function body: #{source}"
            logger.debug "Backtrace: #{e.backtrace.join("\n")}"
          end

-- 
Posted via http://www.ruby-forum.com/.