src/test/codegen-units/item-collection/generic-drop-glue.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 #![deny(dead_code)]
  16 #![feature(start)]
  17
  18 struct StructWithDrop<T1, T2> {
  19     x: T1,
  20     y: T2,
  21 }
  22
  23 impl<T1, T2> Drop for StructWithDrop<T1, T2> {
  24     fn drop(&mut self) {}
  25 }
  26
  27 struct StructNoDrop<T1, T2> {
  28     x: T1,
  29     y: T2,
  30 }
  31
  32 enum EnumWithDrop<T1, T2> {
  33     A(T1),
  34     B(T2)
  35 }
  36
  37 impl<T1, T2> Drop for EnumWithDrop<T1, T2> {
  38     fn drop(&mut self) {}
  39 }
  40
  41 enum EnumNoDrop<T1, T2> {
  42     A(T1),
  43     B(T2)
  44 }
  45
  46
  47 struct NonGenericNoDrop(i32);
  48
  49 struct NonGenericWithDrop(i32);
  50 //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::NonGenericWithDrop[0]> @@ generic_drop_glue0[Internal]
  51
  52 impl Drop for NonGenericWithDrop {
  53     //~ TRANS_ITEM fn generic_drop_glue::{{impl}}[2]::drop[0]
  54     fn drop(&mut self) {}
  55 }
  56
  57 //~ TRANS_ITEM fn generic_drop_glue::start[0]
  58 #[start]
  59 fn start(_: isize, _: *const *const u8) -> isize {
  60     //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::StructWithDrop[0]<i8, char>> @@ generic_drop_glue0[Internal]
  61     //~ TRANS_ITEM fn generic_drop_glue::{{impl}}[0]::drop[0]<i8, char>
  62     let _ = StructWithDrop { x: 0i8, y: 'a' }.x;
  63
  64     //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::StructWithDrop[0]<&str, generic_drop_glue::NonGenericNoDrop[0]>> @@ generic_drop_glue0[Internal]
  65     //~ TRANS_ITEM fn generic_drop_glue::{{impl}}[0]::drop[0]<&str, generic_drop_glue::NonGenericNoDrop[0]>
  66     let _ = StructWithDrop { x: "&str", y: NonGenericNoDrop(0) }.y;
  67
  68     // Should produce no drop glue
  69     let _ = StructNoDrop { x: 'a', y: 0u32 }.x;
  70
  71     // This is supposed to generate drop-glue because it contains a field that
  72     // needs to be dropped.
  73     //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::StructNoDrop[0]<generic_drop_glue::NonGenericWithDrop[0], f64>> @@ generic_drop_glue0[Internal]
  74     let _ = StructNoDrop { x: NonGenericWithDrop(0), y: 0f64 }.y;
  75
  76     //~ TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::EnumWithDrop[0]<i32, i64>> @@ generic_drop_glue0[Internal]
  77     //~ TRANS_ITEM fn generic_drop_glue::{{impl}}[1]::drop[0]<i32, i64>
  78     let _ = match EnumWithDrop::A::<i32, i64>(0) {
  79         EnumWithDrop::A(x) => x,
  80         EnumWithDrop::B(x) => x as i32
  81     };
  82
  83     //~TRANS_ITEM fn core::ptr[0]::drop_in_place[0]<generic_drop_glue::EnumWithDrop[0]<f64, f32>> @@ generic_drop_glue0[Internal]
  84     //~ TRANS_ITEM fn generic_drop_glue::{{impl}}[1]::drop[0]<f64, f32>
  85     let _ = match EnumWithDrop::B::<f64, f32>(1.0) {
  86         EnumWithDrop::A(x) => x,
  87         EnumWithDrop::B(x) => x as f64
  88     };
  89
  90     let _ = match EnumNoDrop::A::<i32, i64>(0) {
  91         EnumNoDrop::A(x) => x,
  92         EnumNoDrop::B(x) => x as i32
  93     };
  94
  95     let _ = match EnumNoDrop::B::<f64, f32>(1.0) {
  96         EnumNoDrop::A(x) => x,
  97         EnumNoDrop::B(x) => x as f64
  98     };
  99
 100     0
 101 }