class Complex

# File vendor/bundle/ruby/3.4.0/gems/json-2.15.2/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-2.15.2/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-3.3.1/lib/bigdecimal/util.rb, line 164
def to_d(precision=0)
  BigDecimal(self) unless self.imag.zero? # to raise error

  BigDecimal(self.real, precision)
end

Returns the value as a BigDecimal. If the imaginary part is not 0, an error is raised

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'

Complex(0.1234567, 0).to_d(4)   # => 0.1235e0
Complex(Rational(22, 7), 0).to_d(3)   # => 0.314e1
Complex(1, 1).to_d   # raises ArgumentError

See also Kernel.BigDecimal.

# File vendor/bundle/ruby/3.4.0/gems/json-2.15.2/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}