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require "hamster/set"
require "hamster/read_copy_update"
module Hamster
# @api private
class MutableSet
include ReadCopyUpdate
def self.[](*items)
MutableSet.new(Set[*items])
end
def add(item)
transform { |set| set.add(item) }
end
alias :<< :add
def add?(item)
added = false
transform do |set|
added = !set.include?(item)
set.add(item)
end
added
end
def delete(item)
transform { |set| set.delete(item) }
end
def delete?(item)
deleted = false
transform do |set|
deleted = set.include?(item)
set.delete(item)
end
deleted
end
end
end
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