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