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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 | // Test that there is no way to get a generic type `T` to be | |
12 | // considered as `Reflect` (or accessible via something that is | |
13 | // considered `Reflect`) without a reflect bound, but that any | |
14 | // concrete type works fine. Note that object types are tested | |
15 | // separately. | |
16 | ||
17 | use std::marker::Reflect; | |
18 | use std::io::Write; | |
19 | ||
20 | struct Struct<T>(T); | |
21 | ||
22 | fn is_reflect<T:Reflect>() { } | |
23 | ||
24 | fn c<T>() { | |
54a0048b | 25 | is_reflect::<Struct<T>>(); //~ ERROR E0277 |
c34b1796 AL |
26 | } |
27 | ||
28 | fn ok_c<T: Reflect>() { | |
29 | is_reflect::<Struct<T>>(); // OK | |
30 | } | |
31 | ||
32 | fn d<T>() { | |
54a0048b | 33 | is_reflect::<(i32, T)>(); //~ ERROR E0277 |
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34 | } |
35 | ||
36 | fn main() { | |
37 | is_reflect::<&i32>(); // OK | |
38 | is_reflect::<Box<Write>>(); // OK | |
39 | } |