Added format validation

Author: s-m-i-t-a

lib/validatex/validators.ex

@@ -62,4 +62,13 @@ defmodule Validatex.Validators do
  {:error, msg}
  end
  end
+
+ @spec format(raw(), Regex.t(), error_msg()) :: Result.t(error_msg(), raw())
+ def format(value, %Regex{} = regex, msg) when raw?(value) and error_msg?(msg) do
+ if value =~ regex do
+ {:ok, value}
+ else
+ {:error, msg}
+ end
+ end
 end