47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
// Copyright 2015 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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// Issue 22443: Reject code using non-regular types that would
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// otherwise cause dropck to loop infinitely.
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//
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// This version is just checking that we still sanely handle a trivial
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// wrapper around the non-regular type. (It also demonstrates how the
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// error messages will report different types depending on which type
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// dropck is analyzing.)
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use std::marker::PhantomData;
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struct Digit<T> {
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elem: T
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}
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struct Node<T:'static> { m: PhantomData<&'static T> }
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enum FingerTree<T:'static> {
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Single(T),
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// According to the bug report, Digit before Box would infinite loop.
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Deep(
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Digit<T>,
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Box<FingerTree<Node<T>>>,
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)
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}
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enum Wrapper<T:'static> {
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Simple,
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Other(FingerTree<T>),
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}
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fn main() {
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let w = //~ ERROR overflow while adding drop-check rules for core::option
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Some(Wrapper::Simple::<u32>);
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//~^ ERROR overflow while adding drop-check rules for core::option::Option
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//~| ERROR overflow while adding drop-check rules for Wrapper
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}
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