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# frozen_string_literal: false # #-- # bigdecimal/util extends various native classes to provide the #to_d method, # and provides BigDecimal#to_d and BigDecimal#to_digits. #++ require 'bigdecimal' class Integer < Numeric # call-seq: # int.to_d -> bigdecimal # # Returns the value of +int+ as a BigDecimal. # # require 'bigdecimal' # require 'bigdecimal/util' # # 42.to_d # => 0.42e2 # # See also Kernel.BigDecimal. # def to_d BigDecimal(self) end end class Float < Numeric # call-seq: # float.to_d -> bigdecimal # float.to_d(precision) -> bigdecimal # # Returns the value of +float+ as a BigDecimal. # The +precision+ parameter is used to determine the number of # significant digits for the result. When +precision+ is set to +0+, # the number of digits to represent the float being converted is determined # automatically. # The default +precision+ is +0+. # # require 'bigdecimal' # require 'bigdecimal/util' # # 0.5.to_d # => 0.5e0 # 1.234.to_d # => 0.1234e1 # 1.234.to_d(2) # => 0.12e1 # # See also Kernel.BigDecimal. # def to_d(precision=0) BigDecimal(self, precision) end end class String # call-seq: # str.to_d -> bigdecimal # # Returns the result of interpreting leading characters in +str+ # as a BigDecimal. # # require 'bigdecimal' # require 'bigdecimal/util' # # "0.5".to_d # => 0.5e0 # "123.45e1".to_d # => 0.12345e4 # "45.67 degrees".to_d # => 0.4567e2 # # See also Kernel.BigDecimal. # def to_d BigDecimal.interpret_loosely(self) end end class BigDecimal < Numeric # call-seq: # a.to_digits -> string # # Converts a BigDecimal to a String of the form "nnnnnn.mmm". # This method is deprecated; use BigDecimal#to_s("F") instead. # # require 'bigdecimal/util' # # d = BigDecimal("3.14") # d.to_digits # => "3.14" # def to_digits if self.nan? || self.infinite? || self.zero? self.to_s else i = self.to_i.to_s _,f,_,z = self.frac.split i + "." + ("0"*(-z)) + f end end # call-seq: # a.to_d -> bigdecimal # # Returns self. # # require 'bigdecimal/util' # # d = BigDecimal("3.14") # d.to_d # => 0.314e1 # def to_d self end end class Rational < Numeric # call-seq: # rat.to_d(precision) -> bigdecimal # # Returns the value as a BigDecimal. # # The required +precision+ parameter is used to determine the number of # significant digits for the result. # # require 'bigdecimal' # require 'bigdecimal/util' # # Rational(22, 7).to_d(3) # => 0.314e1 # # See also Kernel.BigDecimal. # def to_d(precision) BigDecimal(self, precision) end end class Complex < Numeric # call-seq: # cmp.to_d -> bigdecimal # cmp.to_d(precision) -> bigdecimal # # Returns the value as a BigDecimal. # # The +precision+ parameter is required for a rational complex number. # This parameter is used to determine the number of significant digits # for the result. # # require 'bigdecimal' # require 'bigdecimal/util' # # Complex(0.1234567, 0).to_d(4) # => 0.1235e0 # Complex(Rational(22, 7), 0).to_d(3) # => 0.314e1 # # See also Kernel.BigDecimal. # def to_d(*args) BigDecimal(self) unless self.imag.zero? # to raise eerror if args.length == 0 case self.real when Rational BigDecimal(self.real) # to raise error end end self.real.to_d(*args) end end class NilClass # call-seq: # nil.to_d -> bigdecimal # # Returns nil represented as a BigDecimal. # # require 'bigdecimal' # require 'bigdecimal/util' # # nil.to_d # => 0.0 # def to_d BigDecimal(0) end end
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