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require 'bigdecimal'
begin
require 'psych'
rescue LoadError
end
require 'yaml'
class BigDecimal
YAML_TAG = 'tag:yaml.org,2002:float'
YAML_MAPPING = { 'Infinity' => '.Inf', '-Infinity' => '-.Inf', 'NaN' => '.NaN' }
# This emits the number without any scientific notation.
# This is better than self.to_f.to_s since it doesn't lose precision.
#
# Note that reconstituting YAML floats to native floats may lose precision.
def to_yaml(opts = {})
return super if defined?(YAML::ENGINE) && !YAML::ENGINE.syck?
YAML.quick_emit(nil, opts) do |out|
string = to_s
out.scalar(YAML_TAG, YAML_MAPPING[string] || string, :plain)
end
end
def encode_with(coder)
string = to_s
coder.represent_scalar(nil, YAML_MAPPING[string] || string)
end
# Backport this method if it doesn't exist
unless method_defined?(:to_d)
def to_d
self
end
end
DEFAULT_STRING_FORMAT = 'F'
def to_formatted_s(format = DEFAULT_STRING_FORMAT)
_original_to_s(format)
end
alias_method :_original_to_s, :to_s
alias_method :to_s, :to_formatted_s
end
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