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1a4d82fc | 1 | // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
223e47cc LB |
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 | ||
7453a54e | 11 | use std::u32; |
1a4d82fc | 12 | |
7453a54e SL |
13 | #[derive(Copy, Clone, Debug, PartialEq, Eq)] |
14 | pub struct TreeIndex { | |
54a0048b | 15 | index: u32, |
7453a54e | 16 | } |
223e47cc | 17 | |
7453a54e SL |
18 | impl TreeIndex { |
19 | pub fn new(value: usize) -> TreeIndex { | |
20 | assert!(value < (u32::MAX as usize)); | |
21 | TreeIndex { index: value as u32 } | |
223e47cc | 22 | } |
223e47cc | 23 | |
7453a54e SL |
24 | pub fn get(self) -> usize { |
25 | self.index as usize | |
26 | } | |
223e47cc | 27 | } |