| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Test slicing sugar. |
| |
| |
| #![feature(core)] |
| |
| extern crate core; |
| use core::ops::{Index, IndexMut, Range, RangeTo, RangeFrom, RangeFull}; |
| |
| static mut COUNT: usize = 0; |
| |
| struct Foo; |
| |
| impl Index<Range<Foo>> for Foo { |
| type Output = Foo; |
| fn index(&self, index: Range<Foo>) -> &Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl Index<RangeTo<Foo>> for Foo { |
| type Output = Foo; |
| fn index(&self, index: RangeTo<Foo>) -> &Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl Index<RangeFrom<Foo>> for Foo { |
| type Output = Foo; |
| fn index(&self, index: RangeFrom<Foo>) -> &Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl Index<RangeFull> for Foo { |
| type Output = Foo; |
| fn index(&self, _index: RangeFull) -> &Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| |
| impl IndexMut<Range<Foo>> for Foo { |
| fn index_mut(&mut self, index: Range<Foo>) -> &mut Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl IndexMut<RangeTo<Foo>> for Foo { |
| fn index_mut(&mut self, index: RangeTo<Foo>) -> &mut Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl IndexMut<RangeFrom<Foo>> for Foo { |
| fn index_mut(&mut self, index: RangeFrom<Foo>) -> &mut Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| impl IndexMut<RangeFull> for Foo { |
| fn index_mut(&mut self, _index: RangeFull) -> &mut Foo { |
| unsafe { COUNT += 1; } |
| self |
| } |
| } |
| |
| |
| fn main() { |
| let mut x = Foo; |
| &x[..]; |
| &x[Foo..]; |
| &x[..Foo]; |
| &x[Foo..Foo]; |
| &mut x[..]; |
| &mut x[Foo..]; |
| &mut x[..Foo]; |
| &mut x[Foo..Foo]; |
| unsafe { |
| assert_eq!(COUNT, 8); |
| } |
| } |