mirror of https://github.com/rust-lang/rust
36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
#![feature(dropck_eyepatch)]
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// This test ensures that a use of `#[may_dangle]` is rejected if
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// it is not attached to an `unsafe impl`.
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use std::fmt;
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struct Dt<A: fmt::Debug>(&'static str, A);
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struct Dr<'a, B:'a+fmt::Debug>(&'static str, &'a B);
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struct Pt<A,B: fmt::Debug>(&'static str, A, B);
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struct Pr<'a, 'b, B:'a+'b+fmt::Debug>(&'static str, &'a B, &'b B);
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struct St<A: fmt::Debug>(&'static str, A);
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struct Sr<'a, B:'a+fmt::Debug>(&'static str, &'a B);
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impl<A: fmt::Debug> Drop for Dt<A> {
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fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); }
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}
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impl<'a, B: fmt::Debug> Drop for Dr<'a, B> {
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fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); }
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}
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impl<#[may_dangle] A, B: fmt::Debug> Drop for Pt<A, B> {
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//~^ ERROR requires an `unsafe impl` declaration due to `#[may_dangle]` attribute
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// (unsafe to access self.1 due to #[may_dangle] on A)
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fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
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}
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impl<#[may_dangle] 'a, 'b, B: fmt::Debug> Drop for Pr<'a, 'b, B> {
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//~^ ERROR requires an `unsafe impl` declaration due to `#[may_dangle]` attribute
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// (unsafe to access self.1 due to #[may_dangle] on 'a)
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fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
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}
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fn main() {
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}
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