conv

conv

Easy convert from one type to another in Go.

NOTE: unstable

TODO:

• Weak type convert
• ToXXX API

Why

If you are working with interfaces to handle things like dynamic content you’ll need an easy way to convert an interface into a given type. This is the library for you.

If you are taking in data from YAML, TOML or JSON or other formats which lack full types, then conv is the library for you.

Example

Parse configuration with viper and conv.

package main

import (
	"bytes"
	"fmt"
	"net"
	"net/mail"
	"net/url"
	"regexp"
	"time"

	"github.com/helloyi/go-conv"
	"github.com/spf13/viper"
)

func main() {
	viper.SetConfigType("toml")

	cfgData := []byte(`
Num = 21
String = "String"
Duration = "100ms"
Time = "Fri Nov 1 19:13:55 +0800 CST 2019"
ByteSize = "100MB"
IP = "8.8.8.8"
MAC = "02:00:5e:10:00:00:00:01"
URL = "http://host/path?param=x"
Regexp = "[0-9]+"
Mail = "name <user@mail.com>"
`)

	if err := viper.ReadConfig(bytes.NewBuffer(cfgData)); err != nil {
		panic(err)
	}

	rawCfg := viper.AllSettings()

	var cfg struct {
		Num      int
		String   string
		Duration time.Duration
		Time     *time.Time
		ByteSize conv.ByteSize
		IP       net.IP
		MAC      net.HardwareAddr
		URL      *url.URL
		Regexp   *regexp.Regexp
		Mail     *mail.Address
	}

	if err := conv.To(rawCfg, &cfg); err != nil {
		panic(err)
	}
	fmt.Printf("%v\n", cfg)
	// Output: {21 String 100ms 2019-11-01 19:13:55 +0800 CST 104857600 8.8.8.8 02:00:5e:10:00:00:00:01 http://host/path?param=x [0-9]+ "name" <user@mail.com>}
}