33 lines
987 B
Rust
33 lines
987 B
Rust
// 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();
|
|
}
|