27 lines
845 B
Rust
27 lines
845 B
Rust
// compile-flags: -Zmiri-seed=0000000000000000
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// This returns a miri pointer at type usize, if the argument is a proper pointer
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fn transmute_ptr_to_int<T>(x: *const T) -> usize {
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unsafe { std::mem::transmute(x) }
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}
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fn main() {
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// Some casting-to-int with arithmetic.
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let x = &42 as *const i32 as usize;
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let y = x * 2;
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assert_eq!(y, x + x);
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let z = y as u8 as usize;
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assert_eq!(z, y % 256);
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// Pointer string formatting! We can't check the output as it changes when libstd changes,
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// but we can make sure Miri does not error.
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format!("{:?}", &mut 13 as *mut _);
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// Check that intptrcast is triggered for explicit casts and that it is consistent with
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// transmuting.
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let a: *const i32 = &42;
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let b = transmute_ptr_to_int(a) as u8;
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let c = a as usize as u8;
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assert_eq!(b, c);
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}
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