src/test/codegen-units/item-collection/drop_in_place_intrinsic.rs

   1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-tidy-linelength
  12 // compile-flags:-Zprint-trans-items=eager
  13 // compile-flags:-Zinline-in-all-cgus
  14
  15 //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<drop_in_place_intrinsic::StructWithDtor[0]> @@ drop_in_place_intrinsic0[Internal]
  16 struct StructWithDtor(u32);
  17
  18 impl Drop for StructWithDtor {
  19     //~ TRANS_ITEM fn drop_in_place_intrinsic::{{impl}}[0]::drop[0]
  20     fn drop(&mut self) {}
  21 }
  22
  23 //~ TRANS_ITEM fn drop_in_place_intrinsic::main[0]
  24 fn main() {
  25
  26     //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<[drop_in_place_intrinsic::StructWithDtor[0]; 2]> @@ drop_in_place_intrinsic0[Internal]
  27     let x = [StructWithDtor(0), StructWithDtor(1)];
  28
  29     drop_slice_in_place(&x);
  30 }
  31
  32 //~ TRANS_ITEM fn drop_in_place_intrinsic::drop_slice_in_place[0]
  33 fn drop_slice_in_place(x: &[StructWithDtor]) {
  34     unsafe {
  35         // This is the interesting thing in this test case: Normally we would
  36         // not have drop-glue for the unsized [StructWithDtor]. This has to be
  37         // generated though when the drop_in_place() intrinsic is used.
  38         //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<[drop_in_place_intrinsic::StructWithDtor[0]]> @@ drop_in_place_intrinsic0[Internal]
  39         ::std::ptr::drop_in_place(x as *const _ as *mut [StructWithDtor]);
  40     }
  41 }