48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Check that we correctly prevent users from making trait objects
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// from traits with generic methods, unless `where Self : Sized` is
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// present.
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trait Bar {
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fn bar<T>(&self, t: T);
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}
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trait Quux {
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fn bar<T>(&self, t: T)
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where Self : Sized;
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}
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fn make_bar<T:Bar>(t: &T) -> &Bar {
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//~^ ERROR E0038
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//~| NOTE method `bar` has generic type parameters
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//~| NOTE the trait `Bar` cannot be made into an object
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t
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}
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fn make_bar_explicit<T:Bar>(t: &T) -> &Bar {
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//~^ ERROR E0038
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//~| NOTE method `bar` has generic type parameters
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//~| NOTE the trait `Bar` cannot be made into an object
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t as &Bar
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}
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fn make_quux<T:Quux>(t: &T) -> &Quux {
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t
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}
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fn make_quux_explicit<T:Quux>(t: &T) -> &Quux {
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t as &Quux
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}
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fn main() {
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}
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