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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /src/test/ui/dropck/dropck-eyepatch-reorder.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/dropck/dropck-eyepatch-reorder.rs')
-rw-r--r-- | src/test/ui/dropck/dropck-eyepatch-reorder.rs | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/src/test/ui/dropck/dropck-eyepatch-reorder.rs b/src/test/ui/dropck/dropck-eyepatch-reorder.rs deleted file mode 100644 index 44552b3fc..000000000 --- a/src/test/ui/dropck/dropck-eyepatch-reorder.rs +++ /dev/null @@ -1,100 +0,0 @@ -#![feature(dropck_eyepatch)] - -// The point of this test is to test uses of `#[may_dangle]` attribute -// where the formal declaration order (in the impl generics) does not -// match the actual usage order (in the type instantiation). -// -// See also dropck-eyepatch.rs for more information about the general -// structure of the test. - -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: fmt::Debug, 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); } -} -unsafe impl<B: fmt::Debug, #[may_dangle] A: fmt::Debug> Drop for Pt<A, B> { - // (unsafe to access self.1 due to #[may_dangle] on A) - fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); } -} -unsafe impl<'b, #[may_dangle] 'a, B: fmt::Debug> Drop for Pr<'a, 'b, B> { - // (unsafe to access self.1 due to #[may_dangle] on 'a) - fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); } -} - -fn main() { - use std::cell::Cell; - - // We use separate blocks with separate variable to prevent the error - // messages from being deduplicated. - - { - let c_long; - let (mut dt, mut dr): (Dt<_>, Dr<_>); - c_long = Cell::new(1); - - // No error: sufficiently long-lived state can be referenced in dtors - dt = Dt("dt", &c_long); - dr = Dr("dr", &c_long); - } - - { - let (c, mut dt, mut dr): (Cell<_>, Dt<_>, Dr<_>); - c = Cell::new(1); - - // No Error: destructor order precisely modelled - dt = Dt("dt", &c); - dr = Dr("dr", &c); - } - - { - let (mut dt, mut dr, c_shortest): (Dt<_>, Dr<_>, Cell<_>); - c_shortest = Cell::new(1); - - // Error: `c_shortest` dies too soon for the references in dtors to be valid. - dt = Dt("dt", &c_shortest); - //~^ ERROR `c_shortest` does not live long enough - dr = Dr("dr", &c_shortest); - } - - { - let c_long; - let (mut pt, mut pr, c_shortest): (Pt<_, _>, Pr<_>, Cell<_>); - c_long = Cell::new(1); - c_shortest = Cell::new(1); - - // No error: Drop impl asserts .1 (A and &'a _) are not accessed - pt = Pt("pt", &c_shortest, &c_long); - pr = Pr("pr", &c_shortest, &c_long); - } - - { - let c_long; - let (mut pt, mut pr, c_shortest): (Pt<_, _>, Pr<_>, Cell<_>); - c_long = Cell::new(1); - c_shortest = Cell::new(1); - // Error: Drop impl's assertion does not apply to `B` nor `&'b _` - pt = Pt("pt", &c_long, &c_shortest); - //~^ ERROR `c_shortest` does not live long enough - pr = Pr("pr", &c_long, &c_shortest); - } - - { - let (st, sr, c_shortest): (St<_>, Sr<_>, Cell<_>); - c_shortest = Cell::new(1); - // No error: St and Sr have no destructor. - st = St("st", &c_shortest); - sr = Sr("sr", &c_shortest); - } -} - -fn use_imm<T>(_: &T) { } |