chaining error checks

chaincheck.go

func DoSomethingComplicated() error {
	makro checkErrAlpha(..., err error) ... {
		if err != nil && IsSpecificErrorType(err) {
			return fmt.Errorf("specific error happened: %s", err)
		}
	}
	
	makro checkErrBeta(..., err error) ... {
		checkErrAlpha(..., err)
		if err != nil {
			return fmt.Errorf("some general error happened: %s", err)
		}
	}
	
	i, j := checkErrBeta(MoreOtherThings())

	x, y := checkErrAlpha(SomeOtherCall())
	
	return nil
}