67 lines
1.8 KiB
Rust
67 lines
1.8 KiB
Rust
// Copyright 2013 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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fn env<'a>(_: &'a uint, blk: |p: ||: 'a|) {
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// Test that the closure here cannot be assigned
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// the lifetime `'a`, which outlives the current
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// block.
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//
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// FIXME(#4846): The `&'a uint` parameter is needed to ensure that `'a`
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// is a free and not bound region name.
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let mut state = 0;
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let statep = &mut state;
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blk(|| *statep = 1); //~ ERROR cannot infer
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}
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fn no_env_no_for<'a>(_: &'a uint, blk: |p: |||: 'a) {
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// Test that a closure with no free variables CAN
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// outlive the block in which it is created.
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//
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// FIXME(#4846): The `&'a uint` parameter is needed to ensure that `'a`
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// is a free and not bound region name.
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blk(|| ())
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}
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fn repeating_loop() {
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// Test that the closure cannot be created within `loop` loop and
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// called without, even though the state that it closes over is
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// external to the loop.
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let closure;
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let state = 0;
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loop {
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closure = || state; //~ ERROR cannot infer
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break;
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}
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closure();
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}
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fn repeating_while() {
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// Test that the closure cannot be created within `while` loop and
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// called without, even though the state that it closes over is
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// external to the loop.
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let closure;
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let state = 0;
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while true {
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closure = || state; //~ ERROR cannot infer
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break;
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}
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closure();
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}
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fn main() {}
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