| #![feature(no_core)] |
| #![no_core] |
| #![feature(intrinsics, staged_api)] |
| #![feature(lang_items)] |
| #[lang = "sized"] |
| pub trait Sized {} |
| |
| extern "C" { |
| fn printf(s: *const i8, ...); |
| } |
| |
| mod intrinsics { |
| extern "rust-intrinsic" { |
| #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")] |
| pub fn offset<T>(dst: *const T, offset: isize) -> *const T; |
| } |
| } |
| |
| #[lang = "mut_ptr"] |
| impl<T> *mut T { |
| pub const unsafe fn offset(self, count: isize) -> *mut T { |
| unsafe { intrinsics::offset(self, count) as *mut T } |
| } |
| |
| pub const unsafe fn add(self, count: usize) -> Self { |
| unsafe { self.offset(count as isize) } |
| } |
| } |
| |
| #[lang = "const_ptr"] |
| impl<T> *const T { |
| pub const unsafe fn offset(self, count: isize) -> *mut T { |
| unsafe { intrinsics::offset(self, count) as *mut T } |
| } |
| |
| pub const unsafe fn add(self, count: usize) -> Self { |
| unsafe { self.offset(count as isize) } |
| } |
| } |
| |
| fn main() -> i32 { |
| let a: *mut _ = &mut 123; |
| unsafe { |
| let _b = a.add(123); |
| } |
| |
| 0 |
| } |
