class Complex

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/complex.rb, line 9
def self.json_create(object)
  Complex(object['r'], object['i'])
end

See as_json.

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/complex.rb, line 29
def as_json(*)
  {
    JSON.create_id => self.class.name,
    'r'            => real,
    'i'            => imag,
  }
end

Methods Complex#as_json and Complex.json_create may be used to serialize and deserialize a Complex object; see Marshal.

Method Complex#as_json serializes self, returning a 2-element hash representing self:

require 'json/add/complex'
x = Complex(2).as_json      # => {"json_class"=>"Complex", "r"=>2, "i"=>0}
y = Complex(2.0, 4).as_json # => {"json_class"=>"Complex", "r"=>2.0, "i"=>4}

Method JSON.create deserializes such a hash, returning a Complex object:

Complex.json_create(x) # => (2+0i)
Complex.json_create(y) # => (2.0+4i)

# File vendor/bundle/ruby/3.4.0/gems/bigdecimal-3.1.9/lib/bigdecimal/util.rb, line 157
def to_d(*args)
  BigDecimal(self) unless self.imag.zero? # to raise error

  if args.length == 0
    case self.real
    when Rational
      BigDecimal(self.real) # to raise error
    end
  end
  self.real.to_d(*args)
end

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.

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/complex.rb, line 48
def to_json(*args)
  as_json.to_json(*args)
end

Returns a JSON string representing self:

require 'json/add/complex'
puts Complex(2).to_json
puts Complex(2.0, 4).to_json

Output:

{"json_class":"Complex","r":2,"i":0}
{"json_class":"Complex","r":2.0,"i":4}