diff options
Diffstat (limited to 'ext/bigdecimal/lib')
-rw-r--r-- | ext/bigdecimal/lib/bigdecimal/util.rb | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/ext/bigdecimal/lib/bigdecimal/util.rb b/ext/bigdecimal/lib/bigdecimal/util.rb index 4ece8347bd..66fff7867b 100644 --- a/ext/bigdecimal/lib/bigdecimal/util.rb +++ b/ext/bigdecimal/lib/bigdecimal/util.rb @@ -131,6 +131,39 @@ class Rational < Numeric 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 BigDecimal::new. + # + 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 |