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Added Module#alias_method_chain

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git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4276 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
This commit is contained in:
Jamis Buck 2006-04-26 17:46:43 +00:00
parent fe8db23371
commit 794d93f7a5
3 changed files with 19 additions and 0 deletions
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2
activesupport/CHANGELOG
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*SVN*
* Added Module#alias_method_chain [Jamis Buck]
* Updated to Builder 2.0 [DHH]
* Add Array#split for dividing arrays into one or more subarrays by value or block. [Sam Stephenson]

1
activesupport/lib/active_support/core_ext/module.rb
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require File.dirname(__FILE__) + '/module/delegation'
require File.dirname(__FILE__) + '/module/introspection'
require File.dirname(__FILE__) + '/module/loading'
require File.dirname(__FILE__) + '/module/aliasing'

16
activesupport/lib/active_support/core_ext/module/aliasing.rb Normal file
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class Module
# Encapsulates the common pattern of:
#
# alias_method :foo_without_feature, :foo
# alias_method :foo, :foo_with_feature
#
# With this, you simply do:
#
# alias_method_chain :foo, :feature
#
# And both aliases are set up for you.
def alias_method_chain(target, feature)
alias_method "#{target}_without_#{feature}", target
alias_method target, "#{target}_with_#{feature}"
end
end