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Description: A Ruby-based parsing DSL based on parsing expression grammars.
Homepage: http://treetop.rubyforge.org
Clone URL: git://github.com/nathansobo/treetop.git 
Renamed memoization expire to release to clearly distinguish between the 
act of detecting intersection and removing from the ResultCache
Nathan Sobo (author)
Fri May 02 12:12:13 -0700 2008
commit  5df28dcfdad2d5660080ad7cbaf95691766cf5c0
tree    7bf216f9fc0bdaa2eeb5e9d680643960f89e7b6c
parent  f4e3e0cb745231fab7d7471b21dd6a9abcbf4b20
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lib/treetop/runtime/memoization.rb 
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@@ -26,7 +26,7 @@ module Treetop
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         rule_index[interval.first + length_change] = result 
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       end
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-      def expire
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+      def release
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         result.memoizations.delete(self)
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         rule_index.delete(interval.first)
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         result.release
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lib/treetop/runtime/parse_result.rb 
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@@ -48,9 +48,7 @@ module Treetop
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       def expire(expire_parent=false)
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-        memoizations.each do |memoization|
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-          result_cache.schedule_memoization_expiration(memoization)
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-        end
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+        schedule_release_of_memoizations
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         dependents.each { |dependent| dependent.expire(true) }
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       end
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@@ -58,6 +56,13 @@ module Treetop
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         memoizations.each { |memoization| memoization.relocate(length_change) }
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         @interval = interval.transpose(length_change)
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       end
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+      protected
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+      def schedule_release_of_memoizations
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+        memoizations.each do |memoization|
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+          result_cache.schedule_memoization_release(memoization)
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+        end
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+      end
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     end
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   end
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 end
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lib/treetop/runtime/result_cache.rb 
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@@ -27,8 +27,8 @@ module Treetop
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         relocate_remaining_results(range, length_change)
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       end
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-      def schedule_memoization_expiration(memoization)
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-        memoizations_to_expire.push(memoization)
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+      def schedule_memoization_release(memoization)
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+        memoizations_to_release.push(memoization)
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       end
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       def inspect
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@@ -45,18 +45,18 @@ module Treetop
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       protected
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-      attr_reader :result_index, :memoizations_to_expire
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+      attr_reader :result_index, :memoizations_to_release
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       def detect_and_expire_intersected_results(range)
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-        @memoizations_to_expire = []
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+        @memoizations_to_release = []
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         results.each do |result|
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           result.expire if result.interval.intersects?(range)
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         end
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       end
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       def release_expired_memoizations
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-        memoizations_to_expire.uniq.each do |memoization|
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-          memoization.expire
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+        memoizations_to_release.uniq.each do |memoization|
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+          memoization.release
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         end
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       end
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