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//@ compile-flags:-Zmir-opt-level=0 -O
#![deny(dead_code)]
#![feature(coerce_unsized)]
#![feature(unsize)]
#![crate_type = "lib"]
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> {}
struct PresentDrop;
impl Drop for PresentDrop {
fn drop(&mut self) {}
}
// Custom Coercion Case
impl Trait for PresentDrop {
fn foo(&self) {}
}
//~ MONO_ITEM fn start
#[no_mangle]
pub fn start(_: isize, _: *const *const u8) -> isize {
// simple case
let bool_sized = &true;
//~ MONO_ITEM fn <bool as Trait>::foo
let _bool_unsized = bool_sized as &Trait;
let char_sized = &'a';
//~ 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 <f64 as Trait>::foo
let _struct_unsized = struct_sized as &Struct<Trait>;
// custom coercion
let wrapper_sized = Wrapper(&0u32);
//~ MONO_ITEM fn <u32 as Trait>::foo
let _wrapper_sized = wrapper_sized as Wrapper<Trait>;
// with drop
let droppable = &PresentDrop;
//~ MONO_ITEM fn <PresentDrop as std::ops::Drop>::drop @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn std::ptr::drop_in_place::<PresentDrop> - shim(Some(PresentDrop)) @@ unsizing-cgu.0[Internal]
//~ MONO_ITEM fn <PresentDrop as Trait>::foo
let droppable = droppable as &dyn Trait;
false.foo();
0
}
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