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/* { dg-output "parent 123\r*\nchild\r*\n" } */
extern "C" {
fn printf(s: *const i8, ...);
}
#[lang = "sized"]
pub trait Sized {}
struct Foo {
my_int: u32,
// { dg-warning "field is never read: .my_int." "" { target *-*-* } .-1 }
}
trait Parent<T> {
fn parent(&self) -> T;
}
trait Child: Parent<u32> {
fn child(&self);
}
impl Parent<u32> for Foo {
fn parent(&self) -> u32 {
unsafe {
let parent = "parent %u\n\0";
let msg = parent as *const str;
printf(msg as *const i8, self.my_int);
return self.my_int;
}
}
}
impl Child for Foo {
fn child(&self) {
let _ = self;
unsafe {
let child = "child\n\0";
let msg = child as *const str;
printf(msg as *const i8);
}
}
}
pub fn main() -> i32 {
let a = Foo { my_int: 123 };
let b: &dyn Child = &a;
b.parent();
b.child();
0
}
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