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1 | // Copyright 2015 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 | ||
11 | // Regression test for Issue #20343. | |
12 | ||
13 | #![deny(dead_code)] | |
14 | ||
15 | struct B { b: u32 } | |
16 | struct C; | |
17 | struct D; | |
18 | ||
19 | trait T<A> { fn dummy(&self, a: A) { } } | |
20 | impl<A> T<A> for () {} | |
21 | ||
22 | impl B { | |
23 | // test for unused code in arguments | |
24 | fn foo(B { b }: B) -> u32 { b } | |
25 | ||
26 | // test for unused code in return type | |
27 | fn bar() -> C { unsafe { ::std::mem::transmute(()) } } | |
28 | ||
29 | // test for unused code in generics | |
30 | fn baz<A: T<D>>() {} | |
31 | } | |
32 | ||
33 | pub fn main() { | |
34 | let b = B { b: 3 }; | |
35 | B::foo(b); | |
36 | B::bar(); | |
37 | B::baz::<()>(); | |
38 | } |