1 // Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT 2 // file at the top-level directory of this distribution and at 3 // http://rust-lang.org/COPYRIGHT. 4 // 5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or 6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license 7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your 8 // option. This file may not be copied, modified, or distributed 9 // except according to those terms. 10 11 pub mod alloc; 12 pub mod hash_map; 13 pub mod hash_set; 14 mod shim; 15 mod table; 16 17 pub mod fake; 18 19 use std::{error, fmt}; 20 21 trait Recover<Q: ?Sized> { 22 type Key; 23 get(&self, key: &Q) -> Option<&Self::Key>24 fn get(&self, key: &Q) -> Option<&Self::Key>; take(&mut self, key: &Q) -> Option<Self::Key>25 fn take(&mut self, key: &Q) -> Option<Self::Key>; replace(&mut self, key: Self::Key) -> Option<Self::Key>26 fn replace(&mut self, key: Self::Key) -> Option<Self::Key>; 27 } 28 29 #[derive(Debug)] 30 pub struct AllocationInfo { 31 /// The size we are requesting. 32 size: usize, 33 /// The alignment we are requesting. 34 alignment: usize, 35 } 36 37 #[derive(Debug)] 38 pub struct FailedAllocationError { 39 reason: &'static str, 40 /// The allocation info we are requesting, if needed. 41 allocation_info: Option<AllocationInfo>, 42 } 43 44 impl FailedAllocationError { 45 #[inline] new(reason: &'static str) -> Self46 pub fn new(reason: &'static str) -> Self { 47 Self { 48 reason, 49 allocation_info: None, 50 } 51 } 52 } 53 54 impl error::Error for FailedAllocationError { description(&self) -> &str55 fn description(&self) -> &str { 56 self.reason 57 } 58 } 59 60 impl fmt::Display for FailedAllocationError { fmt(&self, f: &mut fmt::Formatter) -> fmt::Result61 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 62 match self.allocation_info { 63 Some(ref info) => write!( 64 f, 65 "{}, allocation: (size: {}, alignment: {})", 66 self.reason, info.size, info.alignment 67 ), 68 None => self.reason.fmt(f), 69 } 70 } 71 } 72