63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
// Copyright 2017 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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// compile-flags: -Z borrowck=compare
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#![feature(generators, generator_trait)]
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use std::ops::{GeneratorState, Generator};
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use std::cell::Cell;
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unsafe fn borrow_local_inline() {
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// Not OK to yield with a borrow of a temporary.
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//
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// (This error occurs because the region shows up in the type of
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// `b` and gets extended by region inference.)
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let mut b = move || {
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let a = &mut 3;
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//~^ ERROR borrow may still be in use when generator yields (Ast)
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//~| ERROR borrow may still be in use when generator yields (Mir)
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yield();
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println!("{}", a);
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};
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b.resume();
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}
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unsafe fn borrow_local_inline_done() {
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// No error here -- `a` is not in scope at the point of `yield`.
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let mut b = move || {
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{
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let a = &mut 3;
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}
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yield();
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};
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b.resume();
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}
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unsafe fn borrow_local() {
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// Not OK to yield with a borrow of a temporary.
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//
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// (This error occurs because the region shows up in the type of
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// `b` and gets extended by region inference.)
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let mut b = move || {
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let a = 3;
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{
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let b = &a;
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//~^ ERROR borrow may still be in use when generator yields (Ast)
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//~| ERROR borrow may still be in use when generator yields (Mir)
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yield();
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println!("{}", b);
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}
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};
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b.resume();
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}
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fn main() { }
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