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Append a "_" to memoized instance variables

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This commit is contained in:
Joshua Peek 2008-07-14 20:25:09 -05:00
parent 911c2c3813
commit 7f0346237e
1 changed files with 4 additions and 3 deletions
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7
activesupport/lib/active_support/memoizable.rb
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@ -7,15 +7,16 @@ module ActiveSupport
module ClassMethods
def memoize(symbol)
original_method = "_unmemoized_#{symbol}"
memoized_ivar = "@_memoized_#{symbol}"
raise "Already memoized #{symbol}" if instance_methods.map(&:to_s).include?(original_method)
alias_method original_method, symbol
class_eval <<-EOS, __FILE__, __LINE__
def #{symbol}
if defined? @#{symbol}
@#{symbol}
if defined? #{memoized_ivar}
#{memoized_ivar}
else
@#{symbol} = #{original_method}
#{memoized_ivar} = #{original_method}
end
end
EOS