mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 05:04:24 +00:00
34 lines
714 B
Rust
34 lines
714 B
Rust
// check-pass
|
|
// pretty-expanded FIXME #23616
|
|
|
|
use std::mem;
|
|
|
|
/// Returns the size of a type
|
|
pub fn size_of<T>() -> usize {
|
|
TypeInfo::size_of(None::<T>)
|
|
}
|
|
|
|
/// Returns the size of the type that `val` points to
|
|
pub fn size_of_val<T>(val: &T) -> usize {
|
|
val.size_of_val()
|
|
}
|
|
|
|
pub trait TypeInfo: Sized {
|
|
fn size_of(_lame_type_hint: Option<Self>) -> usize;
|
|
fn size_of_val(&self) -> usize;
|
|
}
|
|
|
|
impl<T> TypeInfo for T {
|
|
/// The size of the type in bytes.
|
|
fn size_of(_lame_type_hint: Option<T>) -> usize {
|
|
mem::size_of::<T>()
|
|
}
|
|
|
|
/// Returns the size of the type of `self` in bytes.
|
|
fn size_of_val(&self) -> usize {
|
|
TypeInfo::size_of(None::<T>)
|
|
}
|
|
}
|
|
|
|
pub fn main() {}
|