diff options
Diffstat (limited to 'src/test/ui/mismatched_types/cast-rfc0401.rs')
-rw-r--r-- | src/test/ui/mismatched_types/cast-rfc0401.rs | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/test/ui/mismatched_types/cast-rfc0401.rs b/src/test/ui/mismatched_types/cast-rfc0401.rs new file mode 100644 index 000000000..57222f459 --- /dev/null +++ b/src/test/ui/mismatched_types/cast-rfc0401.rs @@ -0,0 +1,72 @@ +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 = core::ptr::null::<u8>(); + let fat_v : *const [u8] = unsafe { &*core::ptr::null::<[u8; 1]>()}; + let fat_sv : *const [i8] = unsafe { &*core::ptr::null::<[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 cannot cast `usize` to a pointer that is wide + 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 +} |