src/test/compile-fail/kindck-impl-type-params.rs

   1 // Copyright 2012 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 // Issue #14061: tests the interaction between generic implementation
  12 // parameter bounds and trait objects.
  13
  14 #![feature(box_syntax)]
  15
  16 use std::marker;
  17
  18 struct S<T>(marker::PhantomData<T>);
  19
  20 trait Gettable<T> {
  21     fn get(&self) -> T { panic!() }
  22 }
  23
  24 impl<T: Send + Copy + 'static> Gettable<T> for S<T> {}
  25
  26 fn f<T>(val: T) {
  27     let t: S<T> = S(marker::PhantomData);
  28     let a = &t as &Gettable<T>;
  29     //~^ ERROR the trait `core::marker::Send` is not implemented
  30     //~^^ ERROR the trait `core::marker::Copy` is not implemented
  31 }
  32
  33 fn g<T>(val: T) {
  34     let t: S<T> = S(marker::PhantomData);
  35     let a: &Gettable<T> = &t;
  36     //~^ ERROR the trait `core::marker::Send` is not implemented
  37     //~^^ ERROR the trait `core::marker::Copy` is not implemented
  38 }
  39
  40 fn foo<'a>() {
  41     let t: S<&'a isize> = S(marker::PhantomData);
  42     let a = &t as &Gettable<&'a isize>;
  43     //~^ ERROR does not fulfill
  44 }
  45
  46 fn foo2<'a>() {
  47     let t: Box<S<String>> = box S(marker::PhantomData);
  48     let a = t as Box<Gettable<String>>;
  49     //~^ ERROR the trait `core::marker::Copy` is not implemented
  50 }
  51
  52 fn foo3<'a>() {
  53     struct Foo; // does not impl Copy
  54
  55     let t: Box<S<Foo>> = box S(marker::PhantomData);
  56     let a: Box<Gettable<Foo>> = t;
  57     //~^ ERROR the trait `core::marker::Copy` is not implemented
  58 }
  59
  60 fn main() { }