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Contents
class Module
# Returns an anonymous module with the specified methods
# of the receiving module renamed.
def clone_renaming( pairs )
mod = self.dup
pairs.each_pair { |to_sym, from_sym|
mod.class_eval {
alias_method( to_sym, from_sym )
undef_method( from_sym )
}
}
return mod
end
# Returns an anonymous module with the specified methods
# of the receiving module removed.
def clone_removing( *meths )
mod = self.dup
methods_to_remove = meths
methods_to_remove.each { |m| mod.class_eval { remove_method m } }
return mod
end
# Returns an anonymous module with only the specified methods
# of the receiving module intact.
def clone_using( *meths )
meths = meths.collect { |m| m.to_s }
methods_to_remove = (self.instance_methods - meths)
mod = self.dup
mod.class_eval { methods_to_remove.each { |m| undef_method m } }
return mod
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCModule < Test::Unit::TestCase
module M
def f; 1; end
def g; 2; end
end
class Remove
include M.clone_removing( :g )
end
class Rename
include M.clone_renaming( :q => :g )
end
class Use
include M.clone_using( :f )
end
def test_removing
assert( Remove.method_defined?(:f) )
assert( ! Remove.method_defined?(:g) )
end
def test_renaming
assert( ! Rename.method_defined?(:g) )
assert( Rename.method_defined?(:f) )
assert( Rename.method_defined?(:q) )
end
def test_using_2
assert( ! Use.method_defined?(:g) )
assert( Use.method_defined?(:f) )
end
end
=end
Version data entries
18 entries across 18 versions & 1 rubygems