Unit tests for Issue 8142, collected into one file.

src/test/compile-fail/reject-specialized-drops-8142.rs

@@ -0,0 +1,79 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Issue 8142: Test that Drop impls cannot be specialized beyond the
+// predicates attached to the struct/enum definition itself.
+
+#![feature(unsafe_destructor)]
+
+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 }
+
+#[unsafe_destructor]
+impl<'al,'adds_bnd:'al> Drop for K<'al,'adds_bnd> {                        // REJECT
+    //~^ ERROR The requirement `'adds_bnd : 'al` is added only by the Drop impl.
+    fn drop(&mut self) { } }
+
+#[unsafe_destructor]
+impl<'al,'adds_bnd>     Drop for L<'al,'adds_bnd> where 'adds_bnd:'al {    // REJECT
+    //~^ ERROR The requirement `'adds_bnd : 'al` is added only by the Drop impl.
+    fn drop(&mut self) { } }
+
+#[unsafe_destructor]
+impl<'ml>               Drop for M<'ml>         { fn drop(&mut self) { } } // ACCEPT
+
+#[unsafe_destructor]
+impl                    Drop for N<'static>     { fn drop(&mut self) { } } // REJECT
+//~^ ERROR Implementations of Drop cannot be specialized
+
+#[unsafe_destructor]
+impl<Cok_nobound> Drop for O<Cok_nobound> { fn drop(&mut self) { } } // ACCEPT
+
+#[unsafe_destructor]
+impl              Drop for P<i8>          { fn drop(&mut self) { } } // REJECT
+//~^ ERROR Implementations of Drop cannot be specialized
+
+#[unsafe_destructor]
+impl<Adds_bnd:Bound> Drop for Q<Adds_bnd> { fn drop(&mut self) { } } // REJECT
+//~^ ERROR The requirement `Adds_bnd : Bound` is added only by the Drop impl.
+
+#[unsafe_destructor]
+impl<'rbnd,Adds_rbnd:'rbnd> Drop for R<Adds_rbnd> { fn drop(&mut self) { } } // REJECT
+//~^ ERROR The requirement `Adds_rbnd : 'rbnd` is added only by the Drop impl.
+
+#[unsafe_destructor]
+impl<Bs:Bound>    Drop for S<Bs>          { fn drop(&mut self) { } } // ACCEPT
+
+#[unsafe_destructor]
+impl<'t,Bt:'t>    Drop for T<'t,Bt>       { fn drop(&mut self) { } } // ACCEPT
+
+impl              Drop for U              { fn drop(&mut self) { } } // ACCEPT
+
+#[unsafe_destructor]
+impl<One>         Drop for V<One,One>     { fn drop(&mut self) { } } // REJECT
+//~^ERROR Implementations of Drop cannot be specialized
+
+#[unsafe_destructor]
+impl<'lw>         Drop for W<'lw,'lw>     { fn drop(&mut self) { } } // REJECT
+//~^ERROR Implementations of Drop cannot be specialized
+
+pub fn main() { }