diff options
Diffstat (limited to 'src/test/ui/consts/const_in_pattern/warn_corner_cases.rs')
-rw-r--r-- | src/test/ui/consts/const_in_pattern/warn_corner_cases.rs | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/src/test/ui/consts/const_in_pattern/warn_corner_cases.rs b/src/test/ui/consts/const_in_pattern/warn_corner_cases.rs deleted file mode 100644 index 15cf3c84d..000000000 --- a/src/test/ui/consts/const_in_pattern/warn_corner_cases.rs +++ /dev/null @@ -1,41 +0,0 @@ -// run-pass - -// This test is checking our logic for structural match checking by enumerating -// the different kinds of const expressions. This test is collecting cases where -// we have accepted the const expression as a pattern in the past but we want -// to begin warning the user that a future version of Rust may start rejecting -// such const expressions. - -// The specific corner cases we are exploring here are instances where the -// const-evaluator computes a value that *does* meet the conditions for -// structural-match, but the const expression itself has abstractions (like -// calls to const functions) that may fit better with a type-based analysis -// rather than a commitment to a specific value. - -#![warn(indirect_structural_match)] - -#[derive(Copy, Clone, Debug)] -struct NoDerive(#[allow(unused_tuple_struct_fields)] u32); - -// This impl makes `NoDerive` irreflexive. -impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } } -impl Eq for NoDerive { } - -fn main() { - const INDEX: Option<NoDerive> = [None, Some(NoDerive(10))][0]; - match None { Some(_) => panic!("whoops"), INDEX => dbg!(INDEX), }; - //~^ WARN must be annotated with `#[derive(PartialEq, Eq)]` - //~| WARN this was previously accepted - - const fn build() -> Option<NoDerive> { None } - const CALL: Option<NoDerive> = build(); - match None { Some(_) => panic!("whoops"), CALL => dbg!(CALL), }; - //~^ WARN must be annotated with `#[derive(PartialEq, Eq)]` - //~| WARN this was previously accepted - - impl NoDerive { const fn none() -> Option<NoDerive> { None } } - const METHOD_CALL: Option<NoDerive> = NoDerive::none(); - match None { Some(_) => panic!("whoops"), METHOD_CALL => dbg!(METHOD_CALL), }; - //~^ WARN must be annotated with `#[derive(PartialEq, Eq)]` - //~| WARN this was previously accepted -} |