diff options
| author | bors <bors@rust-lang.org> | 2018-06-17 22:25:34 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2018-06-17 22:25:34 +0000 |
| commit | 4f2936393e27d0cef2fc2ecddea2f5b0cee2b36a (patch) | |
| tree | a53e353e857c942129af318d1c9cc1dc5b2a16a4 /src | |
| parent | 86a8f1a6374dd558ebdafe061e61720a73ae732c (diff) | |
| parent | 570590f7271ddd1bcedf14a7bbc38975db720419 (diff) | |
| download | rust-4f2936393e27d0cef2fc2ecddea2f5b0cee2b36a.tar.gz rust-4f2936393e27d0cef2fc2ecddea2f5b0cee2b36a.zip | |
Auto merge of #51404 - clarcharr:never_hash, r=KodrAus
impl Hash for ! This was missing in some generic code I was writing and I figured that it would be worthwhile to add this. Blanket-requiring these traits to allow usage of errors in `HashSet`s and `HashMap`s isn't too unreasonable of a use case, and a prerequisite for allowing `!` as an error in such situations is this impl.
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcore/hash/mod.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/libcore/hash/mod.rs b/src/libcore/hash/mod.rs index 3e1f21cafe4..e6f8dfffd63 100644 --- a/src/libcore/hash/mod.rs +++ b/src/libcore/hash/mod.rs @@ -603,6 +603,13 @@ mod impls { } } + #[stable(feature = "never_hash", since = "1.29.0")] + impl Hash for ! { + fn hash<H: Hasher>(&self, _: &mut H) { + *self + } + } + macro_rules! impl_hash_tuple { () => ( #[stable(feature = "rust1", since = "1.0.0")] |