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