1 // Copyright 2016 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.
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.
12 /// An iterator whose items are random accessible efficiently
16 /// The iterator's .len() and size_hint() must be exact.
17 /// `.len()` must be cheap to call.
19 /// .get_unchecked() must return distinct mutable references for distinct
20 /// indices (if applicable), and must return a valid reference if index is in
23 pub unsafe trait TrustedRandomAccess : ExactSizeIterator {
24 unsafe fn get_unchecked(&mut self, i: usize) -> Self::Item;
25 /// Returns `true` if getting an iterator element may have
26 /// side effects. Remember to take inner iterators into account.
27 fn may_have_side_effect() -> bool;