first commit

validator/error.go

@@ -0,0 +1,37 @@
+package validator
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrInvalid  = errors.New("invalid value")
+	ErrNotBlank = errors.New("not blank")
+)
+
+func NewError(err error, value, expect interface{}) Error {
+	return Error{
+		err:    err,
+		value:  value,
+		expect: expect,
+	}
+}
+
+type Error struct {
+	err    error
+	value  interface{}
+	expect interface{}
+}
+
+func (e Error) Error() string {
+	return fmt.Sprintf("%s: expext: %s, given: %s", e.err, e.expect, e.value)
+}
+
+func (e Error) Is(err error) bool {
+	return errors.Is(e.err, err)
+}
+
+func (e Error) Unwrap() error {
+	return e.err
+}