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1 | // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
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11 | // revisions: ast mir |
12 | //[mir]compile-flags: -Zemit-end-regions -Zborrowck-mir | |
13 | ||
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14 | // Test that immutable pattern bindings cannot be reassigned. |
15 | ||
c34b1796 AL |
16 | #![feature(slice_patterns)] |
17 | ||
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18 | enum E { |
19 | Foo(isize) | |
20 | } | |
21 | ||
22 | struct S { | |
23 | bar: isize, | |
24 | } | |
25 | ||
26 | pub fn main() { | |
85aaf69f | 27 | match 1 { |
1a4d82fc | 28 | x => { |
abe05a73 | 29 | x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
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30 | //[mir]~^ ERROR (Mir) [E0384] |
31 | //[mir]~| ERROR (Ast) [E0384] | |
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32 | } |
33 | } | |
34 | ||
35 | match E::Foo(1) { | |
36 | E::Foo(x) => { | |
abe05a73 | 37 | x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
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38 | //[mir]~^ ERROR (Mir) [E0384] |
39 | //[mir]~| ERROR (Ast) [E0384] | |
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40 | } |
41 | } | |
42 | ||
43 | match (S { bar: 1 }) { | |
44 | S { bar: x } => { | |
abe05a73 | 45 | x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
ea8adc8c XL |
46 | //[mir]~^ ERROR (Mir) [E0384] |
47 | //[mir]~| ERROR (Ast) [E0384] | |
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48 | } |
49 | } | |
50 | ||
85aaf69f | 51 | match (1,) { |
1a4d82fc | 52 | (x,) => { |
abe05a73 | 53 | x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
ea8adc8c XL |
54 | //[mir]~^ ERROR (Mir) [E0384] |
55 | //[mir]~| ERROR (Ast) [E0384] | |
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56 | } |
57 | } | |
58 | ||
85aaf69f | 59 | match [1,2,3] { |
1a4d82fc | 60 | [x,_,_] => { |
abe05a73 | 61 | x += 1; //[ast]~ ERROR cannot assign twice to immutable variable `x` |
ea8adc8c XL |
62 | //[mir]~^ ERROR (Mir) [E0384] |
63 | //[mir]~| ERROR (Ast) [E0384] | |
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64 | } |
65 | } | |
66 | } |