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