first commit

validator/enum.go

@@ -0,0 +1,16 @@
+package validator
+
+import "gitoa.ru/go-4devs/console/input"
+
+func Enum(enum ...string) func(input.Value) error {
+	return func(in input.Value) error {
+		v := in.String()
+		for _, e := range enum {
+			if e == v {
+				return nil
+			}
+		}
+
+		return NewError(ErrInvalid, v, enum)
+	}
+}