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Diffstat (limited to 'src/docs/ptr_eq.txt')
| -rw-r--r-- | src/docs/ptr_eq.txt | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/src/docs/ptr_eq.txt b/src/docs/ptr_eq.txt deleted file mode 100644 index 06b36ca55e6..00000000000 --- a/src/docs/ptr_eq.txt +++ /dev/null @@ -1,22 +0,0 @@ -### What it does -Use `std::ptr::eq` when applicable - -### Why is this bad? -`ptr::eq` can be used to compare `&T` references -(which coerce to `*const T` implicitly) by their address rather than -comparing the values they point to. - -### Example -``` -let a = &[1, 2, 3]; -let b = &[1, 2, 3]; - -assert!(a as *const _ as usize == b as *const _ as usize); -``` -Use instead: -``` -let a = &[1, 2, 3]; -let b = &[1, 2, 3]; - -assert!(std::ptr::eq(a, b)); -``` \ No newline at end of file |