rust/src/test/run-pass/catch-expr.rs

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// Copyright 2017 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.
#![feature(catch_expr)]
pub fn main() {
let catch_result = catch {
let x = 5;
x
};
assert_eq!(catch_result, 5);
let mut catch = true;
while catch { catch = false; }
assert_eq!(catch, false);
catch = if catch { false } else { true };
assert_eq!(catch, true);
match catch {
_ => {}
};
}