update input/outpu

input/errs/error.go

@@ -0,0 +1,58 @@
+package errs
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrNotFound       = errors.New("not found")
+	ErrNoArgs         = errors.New("no arguments expected")
+	ErrToManyArgs     = errors.New("too many arguments")
+	ErrUnexpectedType = errors.New("unexpected type")
+	ErrRequired       = errors.New("is required")
+	ErrAppend         = errors.New("failed append")
+	ErrInvalidName    = errors.New("invalid name")
+)
+
+func New(name, t string, err error) Error {
+	return Error{
+		name: name,
+		t:    t,
+		err:  err,
+	}
+}
+
+type Error struct {
+	name string
+	err  error
+	t    string
+}
+
+func (o Error) Error() string {
+	return fmt.Sprintf("%s: '%s' %s", o.t, o.name, o.err)
+}
+
+func (o Error) Is(err error) bool {
+	return errors.Is(err, o.err)
+}
+
+func (o Error) Unwrap() error {
+	return o.err
+}
+
+func Option(name string, err error) Error {
+	return Error{
+		name: name,
+		err:  err,
+		t:    "option",
+	}
+}
+
+func Argument(name string, err error) Error {
+	return Error{
+		name: name,
+		err:  err,
+		t:    "argument",
+	}
+}