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34 lines
1.0 KiB
Rust
34 lines
1.0 KiB
Rust
trait Trait {}
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// Make sure casts between thin-pointer <-> fat pointer obey RFC401
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fn main() {
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let a: &[i32] = &[1, 2, 3];
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let b: Box<[i32]> = Box::new([1, 2, 3]);
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let p = a as *const [i32];
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let q = a.as_ptr();
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a as usize; //~ ERROR casting
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a as isize; //~ ERROR casting
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a as i16; //~ ERROR casting `&[i32]` as `i16` is invalid
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a as u32; //~ ERROR casting `&[i32]` as `u32` is invalid
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b as usize; //~ ERROR non-primitive cast
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p as usize;
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//~^ ERROR casting
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// #22955
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q as *const [i32]; //~ ERROR cannot cast
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// #21397
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let t: *mut (dyn Trait + 'static) = 0 as *mut _;
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//~^ ERROR cannot cast `usize` to a pointer that is wide
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let mut fail: *const str = 0 as *const str;
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//~^ ERROR cannot cast `usize` to a pointer that is wide
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let mut fail2: *const str = 0isize as *const str;
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//~^ ERROR cannot cast `isize` to a pointer that is wide
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}
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fn foo<T: ?Sized>() {
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let s = 0 as *const T;
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//~^ ERROR cannot cast `usize` to a pointer that may be wide
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}
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