| // Copyright 2014 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. |
| |
| enum Enum<'a> { |
| A(&'a isize), |
| B(bool), |
| } |
| |
| fn foo() -> isize { |
| let mut n = 42; |
| let mut x = Enum::A(&mut n); |
| match x { |
| Enum::A(_) if { x = Enum::B(false); false } => 1, |
| //~^ ERROR cannot assign in a pattern guard |
| Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1, |
| //~^ ERROR cannot mutably borrow in a pattern guard |
| //~^^ ERROR cannot assign in a pattern guard |
| Enum::A(p) => *p, |
| Enum::B(_) => 2, |
| } |
| } |
| |
| fn main() { |
| foo(); |
| } |