1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
//@ compile-flags:-Zprint-mono-items=eager
//@ compile-flags:-Zinline-in-all-cgus
//@ compile-flags:-Zmir-opt-level=0
#![deny(dead_code)]
#![feature(coerce_unsized)]
#![feature(unsize)]
#![feature(start)]
use std::marker::Unsize;
use std::ops::CoerceUnsized;
trait Trait {
fn foo(&self);
}
// Simple Case
impl Trait for bool {
fn foo(&self) {}
}
impl Trait for char {
fn foo(&self) {}
}
// Struct Field Case
struct Struct<T: ?Sized> {
_a: u32,
_b: i32,
_c: T
}
impl Trait for f64 {
fn foo(&self) {}
}
// Custom Coercion Case
impl Trait for u32 {
fn foo(&self) {}
}
#[derive(Clone, Copy)]
struct Wrapper<T: ?Sized>(#[allow(dead_code)] *const T);
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Wrapper<U>> for Wrapper<T> {}
//~ MONO_ITEM fn start
#[start]
fn start(_: isize, _: *const *const u8) -> isize {
// simple case
let bool_sized = &true;
//~ MONO_ITEM fn std::ptr::drop_in_place::<bool> - shim(None) @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn <bool as Trait>::foo
let _bool_unsized = bool_sized as &Trait;
let char_sized = &'a';
//~ MONO_ITEM fn std::ptr::drop_in_place::<char> - shim(None) @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn <char as Trait>::foo
let _char_unsized = char_sized as &Trait;
// struct field
let struct_sized = &Struct {
_a: 1,
_b: 2,
_c: 3.0f64
};
//~ MONO_ITEM fn std::ptr::drop_in_place::<f64> - shim(None) @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn <f64 as Trait>::foo
let _struct_unsized = struct_sized as &Struct<Trait>;
// custom coercion
let wrapper_sized = Wrapper(&0u32);
//~ MONO_ITEM fn std::ptr::drop_in_place::<u32> - shim(None) @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn <u32 as Trait>::foo
let _wrapper_sized = wrapper_sized as Wrapper<Trait>;
false.foo();
0
}
|
