ba35e80534
Removes extra global bounds at the winnowing stage rather than when normalizing the param_env. This avoids breaking inference when there is a global bound.
51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
// Copyright 2018 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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#![feature(trivial_bounds)]
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#![allow(unused)]
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#![deny(trivial_bounds)]
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struct A where i32: Copy; //~ ERROR
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trait X<T: Copy> {}
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trait Y<T>: Copy {}
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trait Z {
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type S: Copy;
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}
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// Check only the bound the user writes trigger the lint
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fn trivial_elaboration<T>() where T: X<i32> + Z<S = i32>, i32: Y<T> {} // OK
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fn global_param() where i32: X<()> {} //~ ERROR
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// Should only error on the trait bound, not the implicit
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// projection bound <i32 as Z>::S == i32.
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fn global_projection() where i32: Z<S = i32> {} //~ ERROR
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impl A {
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fn new() -> A { A }
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}
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// Lifetime bounds should be linted as well
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fn global_lifetimes() where i32: 'static, &'static str: 'static {}
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//~^ ERROR
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//~| ERROR
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fn local_lifetimes<'a>() where i32: 'a, &'a str: 'a {} // OK
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fn global_outlives() where 'static: 'static {} //~ ERROR
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// Check that each bound is checked individually
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fn mixed_bounds<T: Copy>() where i32: X<T> + Copy {} //~ ERROR
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fn main() {}
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