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Versions: 19
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Contents
# Must be defined outside of Kernel for jruby, see http://jira.codehaus.org/browse/JRUBY-3609
Enumerator = Enumerable::Enumerator unless Object.const_defined? :Enumerator # Standard in ruby 1.9
class Enumerator
# new with block, standard in Ruby 1.9
unless (self.new{} rescue false)
# A simple class which allows the construction of Enumerator from a block
class Yielder
def initialize(&block)
@main_block = block
end
def each(&block)
@final_block = block
@main_block.call(self)
end
def yield(*arg)
@final_block.yield(*arg)
end
def <<(*arg)
@final_block.yield(*arg)
self
end
end
def initialize_with_optional_block(*arg, &block)
return initialize_without_optional_block(*arg, &nil) unless arg.empty? # Ruby 1.9 apparently ignores the block if any argument is present
initialize_without_optional_block(Yielder.new(&block))
end
Backports.alias_method_chain self, :initialize, :optional_block
end
Backports.alias_method self, :with_object, :each_with_object
end
Version data entries
19 entries across 19 versions & 2 rubygems