27 lines
764 B
Rust
27 lines
764 B
Rust
// Test explores how `#[structral_match]` behaves in tandem with
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// `*const` and `*mut` pointers.
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// run-pass
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#![warn(pointer_structural_match)]
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struct NoDerive(#[allow(unused_tuple_struct_fields)] i32);
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// This impl makes NoDerive irreflexive
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// (which doesn't matter here because `<*const T>::eq` won't recur on `T`).
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impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } }
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impl Eq for NoDerive { }
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#[derive(PartialEq, Eq)]
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struct WrapParam<X>(*const X);
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const WRAP_UNSAFE_PARAM: WrapParam<NoDerive> = WrapParam(std::ptr::null());
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fn main() {
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match WRAP_UNSAFE_PARAM {
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WRAP_UNSAFE_PARAM => { println!("WRAP_UNSAFE_PARAM correctly matched itself"); }
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_ => { panic!("WRAP_UNSAFE_PARAM did not match itself"); }
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}
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}
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