src/test/ui/dropck/reject-specialized-drops-8142.rs

   1 // Issue 8142: Test that Drop impls cannot be specialized beyond the
   2 // predicates attached to the type definition itself.
   3 trait Bound { fn foo(&self) { } }
   4 struct K<'l1,'l2> { x: &'l1 i8, y: &'l2 u8 }
   5 struct L<'l1,'l2> { x: &'l1 i8, y: &'l2 u8 }
   6 struct M<'m> { x: &'m i8 }
   7 struct N<'n> { x: &'n i8 }
   8 struct O<To> { x: *const To }
   9 struct P<Tp> { x: *const Tp }
  10 struct Q<Tq> { x: *const Tq }
  11 struct R<Tr> { x: *const Tr }
  12 struct S<Ts:Bound> { x: *const Ts }
  13 struct T<'t,Ts:'t> { x: &'t Ts }
  14 struct U;
  15 struct V<Tva, Tvb> { x: *const Tva, y: *const Tvb }
  16 struct W<'l1, 'l2> { x: &'l1 i8, y: &'l2 u8 }
  17 struct X<const Ca: usize>;
  18 struct Y<const Ca: usize, const Cb: usize>;
  19
  20 enum Enum<T> { Variant(T) }
  21 struct TupleStruct<T>(T);
  22 union Union<T: Copy> { f: T }
  23
  24 impl<'al,'adds_bnd:'al> Drop for K<'al,'adds_bnd> {                        // REJECT
  25     //~^ ERROR `Drop` impl requires `'adds_bnd: 'al`
  26     fn drop(&mut self) { } }
  27
  28 impl<'al,'adds_bnd>     Drop for L<'al,'adds_bnd> where 'adds_bnd:'al {    // REJECT
  29     //~^ ERROR `Drop` impl requires `'adds_bnd: 'al`
  30     fn drop(&mut self) { } }
  31
  32 impl<'ml>               Drop for M<'ml>         { fn drop(&mut self) { } } // ACCEPT
  33
  34 impl                    Drop for N<'static>     { fn drop(&mut self) { } } // REJECT
  35 //~^ ERROR `Drop` impls cannot be specialized
  36
  37 impl<COkNoBound> Drop for O<COkNoBound> { fn drop(&mut self) { } } // ACCEPT
  38
  39 impl              Drop for P<i8>          { fn drop(&mut self) { } } // REJECT
  40 //~^ ERROR `Drop` impls cannot be specialized
  41
  42 impl<AddsBnd:Bound> Drop for Q<AddsBnd> { fn drop(&mut self) { } } // REJECT
  43 //~^ ERROR `Drop` impl requires `AddsBnd: Bound`
  44
  45 impl<'rbnd,AddsRBnd:'rbnd> Drop for R<AddsRBnd> { fn drop(&mut self) { } } // REJECT
  46 //~^ ERROR `Drop` impl requires `AddsRBnd: 'rbnd`
  47
  48 impl<Bs:Bound>    Drop for S<Bs>          { fn drop(&mut self) { } } // ACCEPT
  49
  50 impl<'t,Bt:'t>    Drop for T<'t,Bt>       { fn drop(&mut self) { } } // ACCEPT
  51
  52 impl              Drop for U              { fn drop(&mut self) { } } // ACCEPT
  53
  54 impl<One>         Drop for V<One,One>     { fn drop(&mut self) { } } // REJECT
  55 //~^ ERROR `Drop` impls cannot be specialized
  56
  57 impl<'lw>         Drop for W<'lw,'lw>     { fn drop(&mut self) { } } // REJECT
  58 //~^ ERROR `Drop` impls cannot be specialized
  59
  60 impl              Drop for X<3>           { fn drop(&mut self) { } } // REJECT
  61 //~^ ERROR `Drop` impls cannot be specialized
  62
  63 impl<const Ca: usize> Drop for Y<Ca, Ca>     { fn drop(&mut self) { } } // REJECT
  64 //~^ ERROR `Drop` impls cannot be specialized
  65
  66 impl<AddsBnd:Bound> Drop for Enum<AddsBnd> { fn drop(&mut self) { } } // REJECT
  67 //~^ ERROR `Drop` impl requires `AddsBnd: Bound`
  68
  69 impl<AddsBnd:Bound> Drop for TupleStruct<AddsBnd> { fn drop(&mut self) { } } // REJECT
  70 //~^ ERROR `Drop` impl requires `AddsBnd: Bound`
  71
  72 impl<AddsBnd:Copy + Bound> Drop for Union<AddsBnd> { fn drop(&mut self) { } } // REJECT
  73 //~^ ERROR `Drop` impl requires `AddsBnd: Bound`
  74
  75 pub fn main() { }