    # File lib/active_support/core_ext/bigdecimal/conversions.rb, line 19
            def to_yaml( opts = {} )
              YAML::quick_emit( nil, opts ) do |out|
                # This emits the number without any scientific notation.
                # I prefer it to using self.to_f.to_s, which would lose precision.
                #
                # Note that YAML allows that when reconsituting floats
                # to native types, some precision may get lost.
                # There is no full precision real YAML tag that I am aware of.
                str = self.to_s
                if str == "Infinity"
                  str = ".Inf"
                elsif str == "-Infinity"
                  str = "-.Inf"
                elsif str == "NaN"
                  str = ".NaN"
                end
                out.scalar( "tag:yaml.org,2002:float", str, :plain )
              end
            end