Method decodeFloat64Null

decode_number_float.go:50–93

(v **float64)

	return dec.raiseInvalidJSONErr(dec.cursor)
}
func (dec *Decoder) decodeFloat64Null(v **float64) error {
	for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
		switch c := dec.data[dec.cursor]; c {
		case ' ', '\n', '\t', '\r', ',':
			continue
		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
			val, err := dec.getFloat()
			if err != nil {
				return err
			}
			if *v == nil {
				*v = new(float64)
			}
			**v = val
			return nil
		case '-':
			dec.cursor = dec.cursor + 1
			val, err := dec.getFloatNegative()
			if err != nil {
				return err
			}
			if *v == nil {
				*v = new(float64)
			}
			**v = -val
			return nil
		case 'n':
			dec.cursor++
			err := dec.assertNull()
			if err != nil {
				return err
			}
			return nil
		default:
			dec.err = dec.makeInvalidUnmarshalErr(v)
			err := dec.skipData()
			if err != nil {
				return err
			}
			return nil
		}
	}
	return dec.raiseInvalidJSONErr(dec.cursor)
}

func (dec *Decoder) getFloatNegative() (float64, error) {
	// look for following numbers