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// timespan - A simple timespan for chrono times. // // Copyright (C) 2017 // Fin Christensen <christensen.fin@gmail.com> // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. use crate::Error; use chrono::format::{DelayedFormat, ParseError, StrftimeItems}; use chrono::Duration; use std::clone::Clone; use std::cmp::{Ord, PartialOrd}; use std::fmt::Display; use std::marker::Copy; use std::ops::{Add, Sub}; use std::str::FromStr; /// Types that implement this trait can be used inside a `Span`. pub trait Spanable: Copy + Clone + Ord + PartialOrd + Add<Duration, Output = Self> + Sub<Duration, Output = Self> { /// This is a wrapper method to the `signed_duration_since` method from `chrono`. fn signed_duration_since(self, _: Self) -> Duration; } /// Spanable types that are parsable can be used to deserialize a given string /// to a span instance. pub trait Parsable: FromStr<Err = ParseError> { /// This is a wrapper method to the `parse_from_str` method from `chrono`. fn parse_from_str(_: &str, _: &str) -> Result<Self, Error> where Self: Sized; } /// Spanable types that are formatable can be used to serialize a given span /// to a string. pub trait Formatable: Display { /// This is a wrapper method to the `format` method from `chrono`. fn format<'a>(&self, _: &'a str) -> DelayedFormat<StrftimeItems<'a>>; }