go-traits

go-traits is a concept package that helps implement mixin behavior using embedded structs and hook interfaces.

Trait list:

• traits.Hasher - An extension for unique hash generators.
• traits.Converter - An extension for miscellaneous converters.
• traits.Stringer - fmt.Stringer implementation extension.
• traits.Validator - Struct fields validation extension.
• traits.Default - Struct fields initialization extension.

Marker trait list:

• traits.PreventUnkeyed - A struct to embed when you need to forbid unkeyed literals usage.
• traits.NonComparable - A struct to embed when you need to prevent structs comparison.

Hook interfaces:

• traits.bootstrap - the Bootstrap function will be triggered on traits.Init call.
• traits.schedule - implement traits.schedule to schedule a function in a separate goroutine on traits.Init call.
• traits.finalize - the Finalize function will be set as an object finalizer via runtime.SetFinalizer on traits.Init call.

Examples

type inner struct {
	Arr []bool
}

type test struct {
	traits.Hasher
	traits.Converter
	traits.Stringer
	traits.Validator

	Num   int    `json:"num"`
	Str   string `json:"str" valid:"numeric"`
	Inn   *inner
	pstr  *string
	C     chan interface{} `json:"-"`
	Iface interface{}
}

func (t *test) Bootstrap() {
	fmt.Println("Bootstrap Test struct...")
}

func (t *test) Finalize() {
	fmt.Println("Finalize Test struct...")
}

func main() {
	str := "bar"
	obj := test{
		Num:   1,
		Str:   "abc",
		Inn:   &inner{make([]bool, 2)},
		pstr:  &str,
		C:     make(chan interface{}),
		Iface: "foo",
	}
	traits.Init(&obj)

	fmt.Println(obj.String())
	fmt.Println(obj.ToJSON())
	fmt.Println(obj.Md5Hex())
	fmt.Println(obj.Sha256Hex())
	fmt.Println(obj.HashCode32())
	fmt.Println(obj.Validate())
}

See the examples folder for more.

Contributing

Any proposal or improvement is very welcome.

License

Licensed under the MIT License.