mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
30 lines
533 B
Rust
30 lines
533 B
Rust
// compile-flags: -C opt-level=3
|
|
|
|
pub struct FatPtr {
|
|
ptr: *mut u8,
|
|
len: usize,
|
|
}
|
|
|
|
impl FatPtr {
|
|
pub fn new(len: usize) -> FatPtr {
|
|
let ptr = Box::into_raw(vec![42u8; len].into_boxed_slice()) as *mut u8;
|
|
|
|
FatPtr { ptr, len }
|
|
}
|
|
}
|
|
|
|
impl std::ops::Deref for FatPtr {
|
|
type Target = [u8];
|
|
|
|
#[inline]
|
|
fn deref(&self) -> &[u8] {
|
|
unsafe { std::slice::from_raw_parts(self.ptr, self.len) }
|
|
}
|
|
}
|
|
|
|
impl std::ops::Drop for FatPtr {
|
|
fn drop(&mut self) {
|
|
println!("Drop");
|
|
}
|
|
}
|