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// run-pass
// test that ordinary fat pointer operations work.
struct Wrapper<T: ?Sized>(#[allow(unused_tuple_struct_fields)] u32, T);
struct FatPtrContainer<'a> {
ptr: &'a [u8]
}
fn fat_ptr_project(a: &Wrapper<[u8]>) -> &[u8] {
&a.1
}
fn fat_ptr_simple(a: &[u8]) -> &[u8] {
a
}
fn fat_ptr_via_local(a: &[u8]) -> &[u8] {
let x = a;
x
}
fn fat_ptr_from_struct(s: FatPtrContainer) -> &[u8] {
s.ptr
}
fn fat_ptr_to_struct(a: &[u8]) -> FatPtrContainer {
FatPtrContainer { ptr: a }
}
fn fat_ptr_store_to<'a>(a: &'a [u8], b: &mut &'a [u8]) {
*b = a;
}
fn fat_ptr_constant() -> &'static str {
"HELLO"
}
fn main() {
let a = Wrapper(4, [7,6,5]);
let p = fat_ptr_project(&a);
let p = fat_ptr_simple(p);
let p = fat_ptr_via_local(p);
let p = fat_ptr_from_struct(fat_ptr_to_struct(p));
let mut target : &[u8] = &[42];
fat_ptr_store_to(p, &mut target);
assert_eq!(target, &a.1);
assert_eq!(fat_ptr_constant(), "HELLO");
}
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