Custom Decoder would be nice!!

[paracha3]

No description provided.

[ilyakaznacheev]

Hi @paracha3. Could you please give more context about how you want to use such a feature?

[vlaabra]

type Config struct {
    Status enum.Status `yaml:"status" decoder:"Dec"`
}

func(*Config) Dec() {}

🤔

[ilyakaznacheev]

@vlaabra I need to think about it. Probably some decoder like json.Unmarshaler would be the better approach, but I still don't know about the usage.

Are there any examples of popular decoders, which could be used like this?

[vlaabra]

import "encoding/hex"
import "go.mongodb.org/mongo-driver/bson/primitive"

type Config struct {
    Decimal primitive.Decimal128 `yaml:"decimal" decoder:"StringToDecimal"` // 12345
    Hex     []byte               `yaml:"hex" decoder:"StringToHex"`         // 1234FF
}

func (c *Config) StringToDecimal(s interface{}) (err error) {
	c.Decimal, err = primitive.ParseDecimal128(fmt.Sprint(s))
	return
}

func (c *Config) StringToHex(s interface{}) (err error) {
	c.Hex, err = hex.DecodeString(fmt.Sprint(s))
	return
}

i need`t, just suggestion

unlike yaml, json calls UnmarshalText and UnmarshalJSON methods if they implementing its interface

[ilyakaznacheev]

Okay, looks good, we'll add this