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Diffstat (limited to 'src/docs/unit_hash.txt')
| -rw-r--r-- | src/docs/unit_hash.txt | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/src/docs/unit_hash.txt b/src/docs/unit_hash.txt deleted file mode 100644 index a22d2994602..00000000000 --- a/src/docs/unit_hash.txt +++ /dev/null @@ -1,20 +0,0 @@ -### What it does -Detects `().hash(_)`. - -### Why is this bad? -Hashing a unit value doesn't do anything as the implementation of `Hash` for `()` is a no-op. - -### Example -``` -match my_enum { - Empty => ().hash(&mut state), - WithValue(x) => x.hash(&mut state), -} -``` -Use instead: -``` -match my_enum { - Empty => 0_u8.hash(&mut state), - WithValue(x) => x.hash(&mut state), -} -``` \ No newline at end of file |