[help] how create custom Interface Marshaler/Unmarshaler for math/big.Rat and math/big.Int about go-yaml HOT 2 CLOSED

import "math/big"

type BigInt big.Int

func (i BigInt) MarshalYAML() ([]byte, error) {
	return []byte(i.String()), nil
}

func (i *BigInt) UnmarshalYAML(b []byte) error {
	var v string
	if err := yaml.Unmarshal(b, &v); err != nil {
		return err
	}
	i.SetString(v)
	return nil
}

package main

import (
	"fmt"
	"math/big"

	"github.com/goccy/go-yaml"
)

func main() {
	var doc struct {
		X *big.Rat `yaml:"x"`
	}
	err := yaml.Unmarshal([]byte("x: 5/4\n"), &doc)
	fmt.Println(err)
	fmt.Printf("%+v\n", doc)

	b, err := yaml.Marshal(doc)
	fmt.Println(err)
	fmt.Println(string(b))
}