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[rustc.git] / src / test / compile-fail / reflect.rs
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>() {
25 is_reflect::<Struct<T>>(); //~ ERROR E0277
26 }
27
28 fn ok_c<T: Reflect>() {
29 is_reflect::<Struct<T>>(); // OK
30 }
31
32 fn d<T>() {
33 is_reflect::<(i32, T)>(); //~ ERROR E0277
34 }
35
36 fn main() {
37 is_reflect::<&i32>(); // OK
38 is_reflect::<Box<Write>>(); // OK
39 }