rust/tests/ui/dropck/reject-specialized-drops-8142.rs

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// Issue 8142: Test that Drop impls cannot be specialized beyond the
// predicates attached to the type definition itself.
trait Bound { fn foo(&self) { } }
struct K<'l1,'l2> { x: &'l1 i8, y: &'l2 u8 }
struct L<'l1,'l2> { x: &'l1 i8, y: &'l2 u8 }
struct M<'m> { x: &'m i8 }
struct N<'n> { x: &'n i8 }
struct O<To> { x: *const To }
struct P<Tp> { x: *const Tp }
struct Q<Tq> { x: *const Tq }
struct R<Tr> { x: *const Tr }
struct S<Ts:Bound> { x: *const Ts }
struct T<'t,Ts:'t> { x: &'t Ts }
struct U;
struct V<Tva, Tvb> { x: *const Tva, y: *const Tvb }
struct W<'l1, 'l2> { x: &'l1 i8, y: &'l2 u8 }
struct X<const Ca: usize>;
struct Y<const Ca: usize, const Cb: usize>;
enum Enum<T> { Variant(T) }
struct TupleStruct<T>(T);
union Union<T: Copy> { f: T }
impl<'al,'adds_bnd:'al> Drop for K<'al,'adds_bnd> { // REJECT
//~^ ERROR `Drop` impl requires `'adds_bnd: 'al`
fn drop(&mut self) { } }
impl<'al,'adds_bnd> Drop for L<'al,'adds_bnd> where 'adds_bnd:'al { // REJECT
//~^ ERROR `Drop` impl requires `'adds_bnd: 'al`
fn drop(&mut self) { } }
impl<'ml> Drop for M<'ml> { fn drop(&mut self) { } } // ACCEPT
impl Drop for N<'static> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl<COkNoBound> Drop for O<COkNoBound> { fn drop(&mut self) { } } // ACCEPT
impl Drop for P<i8> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl<AddsBnd:Bound> Drop for Q<AddsBnd> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impl requires `AddsBnd: Bound`
impl<'rbnd,AddsRBnd:'rbnd> Drop for R<AddsRBnd> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impl requires `AddsRBnd: 'rbnd`
impl<Bs:Bound> Drop for S<Bs> { fn drop(&mut self) { } } // ACCEPT
impl<'t,Bt:'t> Drop for T<'t,Bt> { fn drop(&mut self) { } } // ACCEPT
impl Drop for U { fn drop(&mut self) { } } // ACCEPT
impl<One> Drop for V<One,One> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl<'lw> Drop for W<'lw,'lw> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl Drop for X<3> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl<const Ca: usize> Drop for Y<Ca, Ca> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impls cannot be specialized
impl<AddsBnd:Bound> Drop for Enum<AddsBnd> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impl requires `AddsBnd: Bound`
impl<AddsBnd:Bound> Drop for TupleStruct<AddsBnd> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impl requires `AddsBnd: Bound`
impl<AddsBnd:Copy + Bound> Drop for Union<AddsBnd> { fn drop(&mut self) { } } // REJECT
//~^ ERROR `Drop` impl requires `AddsBnd: Bound`
pub fn main() { }