ripytide
67 lines
1.7 KiB
Rust
67 lines
1.7 KiB
Rust
/*
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Copyright 2022 James Forster
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This file is part of range_bounds_map.
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range_bounds_map is free software: you can redistribute it and/or
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modify it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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range_bounds_map is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with range_bounds_map. If not, see <https://www.gnu.org/licenses/>.
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*/
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use std::cmp::Ordering;
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pub enum CustomOrdWrapper<C, T> {
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CustomOrd(C),
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Value(T),
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}
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impl<C, T> Ord for CustomOrdWrapper<C, T>
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where
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C: Fn(&T) -> Ordering,
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{
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fn cmp(&self, other: &Self) -> Ordering {
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match (self, other) {
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(
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CustomOrdWrapper::CustomOrd(custom_ord),
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CustomOrdWrapper::Value(value),
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) => custom_ord(value),
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(
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CustomOrdWrapper::Value(value),
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CustomOrdWrapper::CustomOrd(custom_ord),
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) => custom_ord(value),
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_ => panic!(
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"You must have exactly ONE Value and ONE CustomOrd when comparing CustomOrdWrapper's"
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),
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}
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}
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}
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impl<C, T> PartialOrd for CustomOrdWrapper<C, T>
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where
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C: Fn(&T) -> Ordering,
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{
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl<C, T> Eq for CustomOrdWrapper<C, T> where C: Fn(&T) -> Ordering {}
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impl<C, T> PartialEq for CustomOrdWrapper<C, T>
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where
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C: Fn(&T) -> Ordering,
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{
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fn eq(&self, other: &Self) -> bool {
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self.cmp(other).is_eq()
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}
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}
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