| fn illegal_cast<U:?Sized,V:?Sized>(u: *const U) -> *const V |
| { |
| u as *const V //~ ERROR is invalid |
| } |
| |
| fn illegal_cast_2<U:?Sized>(u: *const U) -> *const str |
| { |
| u as *const str //~ ERROR is invalid |
| } |
| |
| trait Foo { fn foo(&self) {} } |
| impl<T> Foo for T {} |
| |
| trait Bar { fn foo(&self) {} } |
| impl<T> Bar for T {} |
| |
| enum E { |
| A, B |
| } |
| |
| fn main() |
| { |
| let f: f32 = 1.2; |
| let v = 0 as *const u8; |
| let fat_v : *const [u8] = unsafe { &*(0 as *const [u8; 1])}; |
| let fat_sv : *const [i8] = unsafe { &*(0 as *const [i8; 1])}; |
| let foo: &dyn Foo = &f; |
| |
| let _ = v as &u8; //~ ERROR non-primitive cast |
| let _ = v as E; //~ ERROR non-primitive cast |
| let _ = v as fn(); //~ ERROR non-primitive cast |
| let _ = v as (u32,); //~ ERROR non-primitive cast |
| let _ = Some(&v) as *const u8; //~ ERROR non-primitive cast |
| |
| let _ = v as f32; //~ ERROR is invalid |
| let _ = main as f64; //~ ERROR is invalid |
| let _ = &v as usize; //~ ERROR is invalid |
| let _ = f as *const u8; //~ ERROR is invalid |
| let _ = 3_i32 as bool; //~ ERROR cannot cast |
| let _ = E::A as bool; //~ ERROR cannot cast |
| let _ = 0x61u32 as char; //~ ERROR can be cast as |
| |
| let _ = false as f32; //~ ERROR is invalid |
| let _ = E::A as f32; //~ ERROR is invalid |
| let _ = 'a' as f32; //~ ERROR is invalid |
| |
| let _ = false as *const u8; //~ ERROR is invalid |
| let _ = E::A as *const u8; //~ ERROR is invalid |
| let _ = 'a' as *const u8; //~ ERROR is invalid |
| |
| let _ = 42usize as *const [u8]; //~ ERROR is invalid |
| let _ = v as *const [u8]; //~ ERROR cannot cast |
| let _ = fat_v as *const dyn Foo; //~ ERROR the size for values of type |
| let _ = foo as *const str; //~ ERROR is invalid |
| let _ = foo as *mut str; //~ ERROR is invalid |
| let _ = main as *mut str; //~ ERROR is invalid |
| let _ = &f as *mut f32; //~ ERROR is invalid |
| let _ = &f as *const f64; //~ ERROR is invalid |
| let _ = fat_sv as usize; //~ ERROR is invalid |
| |
| let a : *const str = "hello"; |
| let _ = a as *const dyn Foo; //~ ERROR the size for values of type |
| |
| // check no error cascade |
| let _ = main.f as *const u32; //~ ERROR no field |
| |
| let cf: *const dyn Foo = &0; |
| let _ = cf as *const [u16]; //~ ERROR is invalid |
| let _ = cf as *const dyn Bar; //~ ERROR is invalid |
| |
| vec![0.0].iter().map(|s| s as f32).collect::<Vec<f32>>(); //~ ERROR is invalid |
| } |