class SafeYAML::Parse::Sexagesimal

def self.value(value)
  before_decimal, after_decimal = value.split(".")
  whole_part = 0
  multiplier = 1
  before_decimal = before_decimal.split(":")
  until before_decimal.empty?
    whole_part += (Float(before_decimal.pop) * multiplier)
    multiplier *= 60
  end
  result = whole_part
  result += Float("." + after_decimal) unless after_decimal.nil?
  result *= -1 if value[0] == "-"
  result
end