122 lines
3.0 KiB
Rust
122 lines
3.0 KiB
Rust
#![feature(plugin)]
|
|
#![plugin(clippy)]
|
|
|
|
#![allow(dead_code)]
|
|
|
|
extern crate core;
|
|
|
|
use std::mem::transmute as my_transmute;
|
|
use std::vec::Vec as MyVec;
|
|
|
|
fn my_int() -> Usize {
|
|
Usize(42)
|
|
}
|
|
|
|
fn my_vec() -> MyVec<i32> {
|
|
vec![]
|
|
}
|
|
|
|
#[allow(needless_lifetimes)]
|
|
#[deny(useless_transmute)]
|
|
unsafe fn _generic<'a, T, U: 'a>(t: &'a T) {
|
|
let _: &'a T = core::intrinsics::transmute(t);
|
|
|
|
let _: &'a U = core::intrinsics::transmute(t);
|
|
|
|
let _: *const T = core::intrinsics::transmute(t);
|
|
|
|
let _: *mut T = core::intrinsics::transmute(t);
|
|
|
|
let _: *const U = core::intrinsics::transmute(t);
|
|
}
|
|
|
|
#[deny(transmute_ptr_to_ref)]
|
|
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
|
|
let _: &T = std::mem::transmute(p);
|
|
let _: &T = &*p;
|
|
|
|
let _: &mut T = std::mem::transmute(m);
|
|
let _: &mut T = &mut *m;
|
|
|
|
let _: &T = std::mem::transmute(m);
|
|
let _: &T = &*m;
|
|
|
|
let _: &mut T = std::mem::transmute(p as *mut T);
|
|
let _ = &mut *(p as *mut T);
|
|
|
|
let _: &T = std::mem::transmute(o);
|
|
let _: &T = &*(o as *const T);
|
|
|
|
let _: &mut T = std::mem::transmute(om);
|
|
let _: &mut T = &mut *(om as *mut T);
|
|
|
|
let _: &T = std::mem::transmute(om);
|
|
let _: &T = &*(om as *const T);
|
|
}
|
|
|
|
#[deny(transmute_ptr_to_ref)]
|
|
fn issue1231() {
|
|
struct Foo<'a, T: 'a> {
|
|
bar: &'a T,
|
|
}
|
|
|
|
let raw = 42 as *const i32;
|
|
let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
|
|
|
|
let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };
|
|
|
|
type Bar<'a> = &'a u8;
|
|
let raw = 42 as *const i32;
|
|
unsafe { std::mem::transmute::<_, Bar>(raw) };
|
|
}
|
|
|
|
#[deny(useless_transmute)]
|
|
fn useless() {
|
|
unsafe {
|
|
let _: Vec<i32> = core::intrinsics::transmute(my_vec());
|
|
|
|
let _: Vec<i32> = core::mem::transmute(my_vec());
|
|
|
|
let _: Vec<i32> = std::intrinsics::transmute(my_vec());
|
|
|
|
let _: Vec<i32> = std::mem::transmute(my_vec());
|
|
|
|
let _: Vec<i32> = my_transmute(my_vec());
|
|
|
|
let _: Vec<u32> = core::intrinsics::transmute(my_vec());
|
|
let _: Vec<u32> = core::mem::transmute(my_vec());
|
|
let _: Vec<u32> = std::intrinsics::transmute(my_vec());
|
|
let _: Vec<u32> = std::mem::transmute(my_vec());
|
|
let _: Vec<u32> = my_transmute(my_vec());
|
|
|
|
let _: *const usize = std::mem::transmute(5_isize);
|
|
|
|
let _ = 5_isize as *const usize;
|
|
|
|
let _: *const usize = std::mem::transmute(1+1usize);
|
|
|
|
let _ = (1+1_usize) as *const usize;
|
|
}
|
|
}
|
|
|
|
struct Usize(usize);
|
|
|
|
#[deny(crosspointer_transmute)]
|
|
fn crosspointer() {
|
|
let mut int: Usize = Usize(0);
|
|
let int_const_ptr: *const Usize = &int as *const Usize;
|
|
let int_mut_ptr: *mut Usize = &mut int as *mut Usize;
|
|
|
|
unsafe {
|
|
let _: Usize = core::intrinsics::transmute(int_const_ptr);
|
|
|
|
let _: Usize = core::intrinsics::transmute(int_mut_ptr);
|
|
|
|
let _: *const Usize = core::intrinsics::transmute(my_int());
|
|
|
|
let _: *mut Usize = core::intrinsics::transmute(my_int());
|
|
}
|
|
}
|
|
|
|
fn main() { }
|