yeh

Yet another Error Handler for Golang.

This Project An Experimental Idea For Error Handler Implementation With Go Generics

Examples

Must

Also Must has support Must0, Must2, Must3, Must4 and Must5 methods. For multiple return types.

got := func() (err error) {
    defer yeh.Recover(&err)

    value := yeh.Must(os.Open("file.not.exists.txt"))

    fmt.Printf("Output: %d\n", value)

    return nil
}()

if got == nil {
    t.Errorf("Failed")
}

if got != fs.ErrExist {
    t.Errorf("Failed")
}

MustWith

Also Must has support MustWith0, MustWith2, MustWith3, MustWith4 and MustWith5 methods. For multiple return types.

Replace

got := func() (err error) {
    defer yeh.Recover(&err)

    outputValue := yeh.MustWith(os.Open("file.not.exists.txt")).Replace(ErrCustomExists)

    fmt.Printf("Output: %d\n", outputValue)

    return nil
}()

if got == nil {
    t.Errorf("Failed, unexpected error")
}

if got == fs.ErrExist {
    t.Errorf("Failed, unexpected error")
}

if got != ErrCustomExists {
    t.Errorf("Failed, unexpected error")
}

Wrap

got := func() (err error) {
	defer yeh.Recover(&err)

	outputValue := yeh.MustWith(os.Open("file.not.exists.txt")).Wrap(ErrCustomExists)

	fmt.Printf("Output: %d\n", outputValue)

	return nil
}()

if got == nil {
	t.Errorf("Failed, unexpected error")
}

if !strings.HasPrefix(got.Error(), fs.ErrExist.Error()) {
	t.Errorf("Failed, unexpected error")
}

if !errors.Is(got, ErrCustomExists) {
	t.Errorf("Failed, unexpected error")
}

Callback

got := func() (err error) {
	defer yeh.Recover(&err)

	outputValue := yeh.MustWith(os.Open("file.not.exists.txt")).Callback(func(err error) error {
		if errors.Is(err, fs.) {
			return ErrCustomExists
		}
		return err
	})

	fmt.Printf("Output: %d\n", outputValue)

	return nil
}()

if got == nil {
	t.Errorf("Failed, unexpected error")
}

if got == fs.ErrExist {
	t.Errorf("Failed, unexpected error")
}

if got != ErrCustomExists {
	t.Errorf("Failed, unexpected error")
}