| // Copyright 2012-2014 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. |
| |
| // revisions: ast mir |
| //[mir]compile-flags: -Z borrowck=mir |
| |
| // Test that immutable pattern bindings cannot be reassigned. |
| |
| enum E { |
| Foo(isize) |
| } |
| |
| struct S { |
| bar: isize, |
| } |
| |
| pub fn main() { |
| match 1 { |
| x => { |
| x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
| //[mir]~^ ERROR [E0384] |
| } |
| } |
| |
| match E::Foo(1) { |
| E::Foo(x) => { |
| x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
| //[mir]~^ ERROR [E0384] |
| } |
| } |
| |
| match (S { bar: 1 }) { |
| S { bar: x } => { |
| x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
| //[mir]~^ ERROR [E0384] |
| } |
| } |
| |
| match (1,) { |
| (x,) => { |
| x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
| //[mir]~^ ERROR [E0384] |
| } |
| } |
| |
| match [1,2,3] { |
| [x,_,_] => { |
| x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
| //[mir]~^ ERROR [E0384] |
| } |
| } |
| } |