30 lines
1021 B
Rust
30 lines
1021 B
Rust
// This is part of a set of tests exploring the different ways a
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// structural-match ADT might try to hold a
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// non-structural-match in hidden manner that lets matches
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// through that we had intended to reject.
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//
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// See discussion on rust-lang/rust#62307 and rust-lang/rust#62339
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#![warn(indirect_structural_match)]
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//@ run-pass
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struct NoDerive(#[allow(dead_code)] i32);
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// This impl makes NoDerive irreflexive.
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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<'a, T>(&'a &'a T);
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const WRAP_DOUBLY_INDIRECT_PARAM: & &WrapParam<NoDerive> = & &WrapParam(& & NoDerive(0));
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fn main() {
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match WRAP_DOUBLY_INDIRECT_PARAM {
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WRAP_DOUBLY_INDIRECT_PARAM => { panic!("WRAP_DOUBLY_INDIRECT_PARAM matched itself"); }
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//~^ WARN must be annotated with `#[derive(PartialEq)]`
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//~| WARN this was previously accepted
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_ => { println!("WRAP_DOUBLY_INDIRECT_PARAM correctly did not match itself"); }
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}
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}
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