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//opt/alt/ruby20/lib64/ruby/2.0.0/optparse/date.rb
require 'optparse' require 'date' OptionParser.accept(DateTime) do |s,| begin DateTime.parse(s) if s rescue ArgumentError raise OptionParser::InvalidArgument, s end end OptionParser.accept(Date) do |s,| begin Date.parse(s) if s rescue ArgumentError raise OptionParser::InvalidArgument, s end end
