From 9de83050d3a4b260d4aeb5d09ec4eb64f913ba64 Mon Sep 17 00:00:00 2001
From: Carlhuda <carlhuda@engineyard.com>
Date: Mon, 15 Mar 2010 11:58:05 -0700
Subject: Add deprecation notices for <% %>.

  * The approach is to compile <% %> into a method call that checks whether
    the value returned from a block is a String. If it is, it concats to the buffer and
    prints a deprecation warning.
  * <%= %> uses exactly the same logic to compile the template, which first checks
    to see whether it's compiling a block.
  * This should have no impact on other uses of block in templates. For instance, in
    <% [1,2,3].each do |i| %><%= i %><% end %>, the call to each returns an Array,
    not a String, so the result is not concatenated
  * In two cases (#capture and #cache), a String can be returned that should *never*
    be concatenated. We have temporarily created a String subclass called NonConcattingString
    which behaves (and is serialized) identically to String, but is not concatenated
    by the code that handles deprecated <% %> block helpers. Once we remove support
    for <% %> block helpers, we can remove NonConcattingString.
---
 .../helpers/deprecated_block_helpers.rb            | 52 ----------------------
 1 file changed, 52 deletions(-)
 delete mode 100644 actionpack/lib/action_view/helpers/deprecated_block_helpers.rb

(limited to 'actionpack/lib/action_view/helpers/deprecated_block_helpers.rb')

diff --git a/actionpack/lib/action_view/helpers/deprecated_block_helpers.rb b/actionpack/lib/action_view/helpers/deprecated_block_helpers.rb
deleted file mode 100644
index 3d0657e873..0000000000
--- a/actionpack/lib/action_view/helpers/deprecated_block_helpers.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-module ActionView
-  module Helpers
-    module DeprecatedBlockHelpers
-      extend ActiveSupport::Concern
-
-      include ActionView::Helpers::TagHelper
-      include ActionView::Helpers::TextHelper
-      include ActionView::Helpers::JavaScriptHelper
-      include ActionView::Helpers::FormHelper
-
-      def content_tag(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      def javascript_tag(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      def form_for(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      def form_tag(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      def fields_for(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      def field_set_tag(*, &block)
-        block_called_from_erb?(block) ? safe_concat(super) : super
-      end
-
-      BLOCK_CALLED_FROM_ERB = 'defined? __in_erb_template'
-
-      if RUBY_VERSION < '1.9.0'
-        # Check whether we're called from an erb template.
-        # We'd return a string in any other case, but erb <%= ... %>
-        # can't take an <% end %> later on, so we have to use <% ... %>
-        # and implicitly concat.
-        def block_called_from_erb?(block)
-          block && eval(BLOCK_CALLED_FROM_ERB, block)
-        end
-      else
-        def block_called_from_erb?(block)
-          block && eval(BLOCK_CALLED_FROM_ERB, block.binding)
-        end
-      end
-    end
-  end
-end
\ No newline at end of file
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