From c70fd5df7fd8af3a50539d6edf9c3453d2f892e8 Mon Sep 17 00:00:00 2001
From: Jeremy Kemper <jeremy@bitsweat.net>
Date: Tue, 11 Sep 2007 21:49:35 +0000
Subject: Remove unused HashCaching

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7467 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 activesupport/lib/active_support/caching_tools.rb | 62 -----------------------
 1 file changed, 62 deletions(-)
 delete mode 100644 activesupport/lib/active_support/caching_tools.rb

(limited to 'activesupport/lib/active_support')

diff --git a/activesupport/lib/active_support/caching_tools.rb b/activesupport/lib/active_support/caching_tools.rb
deleted file mode 100644
index c889c148b4..0000000000
--- a/activesupport/lib/active_support/caching_tools.rb
+++ /dev/null
@@ -1,62 +0,0 @@
-module ActiveSupport
-  module CachingTools #:nodoc:
-    
-    # Provide shortcuts to simply the creation of nested default hashes. This
-    # pattern is useful, common practice, and unsightly when done manually.
-    module HashCaching
-      # Dynamically create a nested hash structure used to cache calls to +method_name+
-      # The cache method is named +#{method_name}_cache+ unless :as => :alternate_name
-      # is given.
-      #
-      # The hash structure is created using nested Hash.new. For example:
-      # 
-      #   def slow_method(a, b) a ** b end
-      # 
-      # can be cached using hash_cache :slow_method, which will define the method
-      # slow_method_cache. We can then find the result of a ** b using:
-      # 
-      #   slow_method_cache[a][b]
-      # 
-      # The hash structure returned by slow_method_cache would look like this:
-      # 
-      #   Hash.new do |as, a|
-      #     as[a] = Hash.new do |bs, b|
-      #       bs[b] = slow_method(a, b)
-      #     end
-      #   end
-      # 
-      # The generated code is actually compressed onto a single line to maintain
-      # sensible backtrace signatures.
-      #
-      def hash_cache(method_name, options = {})
-        selector = options[:as] || "#{method_name}_cache"
-        method = self.instance_method(method_name)
-        
-        args = []
-        code = "def #{selector}(); @#{selector} ||= "
-        
-        (1..method.arity).each do |n|
-          args << "v#{n}"
-          code << "Hash.new {|h#{n}, v#{n}| h#{n}[v#{n}] = "
-        end
-        
-        # Add the method call with arguments, followed by closing braces and end.
-        code << "#{method_name}(#{args * ', '}) #{'}' * method.arity} end"
-        
-        # Extract the line number information from the caller. Exceptions arising
-        # in the generated code should point to the +hash_cache :...+ line.
-        if caller[0] && /^(.*):(\d+)$/ =~ caller[0]
-          file, line_number = $1, $2.to_i
-        else # We can't give good trackback info; fallback to this line:
-          file, line_number = __FILE__, __LINE__
-        end
-        
-        # We use eval rather than building proc's because it allows us to avoid
-        # linking the Hash's to this method's binding. Experience has shown that
-        # doing so can cause obtuse memory leaks.
-        class_eval code, file, line_number
-      end
-    end
-    
-  end
-end
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