2018-fumichan-thesis / practice / vendor / bundle / ruby / 2.5.0 / gems / backports-3.11.4 / lib / backports / 2.2.0 / float / prev_float.rb

unless Float.method_defined? :prev_float
  require 'backports/tools/float_integer_conversion'
  require 'backports/1.9.2/float/infinity'

  class Float
    def prev_float
      return -Float::INFINITY if self == -Float::INFINITY
      Backports.integer_to_float(Backports.float_to_integer(self)-1)
    end
  end
end