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// Copyright 2023 宋昊文
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

pub mod addressing;

pub type CountryCode = u16;
pub type NetworkCode = u16;

pub trait ThreeDigit {
    fn is_valid_three_digits(self) -> bool;
    fn string_repr(self) -> String;
}

impl ThreeDigit for u16 {
    fn is_valid_three_digits(self) -> bool {
        self < 1000
    }

    fn string_repr(self) -> String {
        format!("{:03}", self)
    }
}