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| author | Ariel Ben-Yehuda <arielb1@mail.tau.ac.il> | 2017-04-05 23:01:08 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-04-05 23:01:08 +0000 |
| commit | 9d074473da5fef4b1d9ebbbb7f181edcb7a365a0 (patch) | |
| tree | 4c1ecbe25d9034e8a32979bf577c0de93e64da50 /src/test/run-pass/thinlto | |
| parent | fc5ff66b04af18b42a5278f1f74875311c957555 (diff) | |
| parent | 1f70247446914a8b58bd088f32bcca792d30d75f (diff) | |
| download | rust-9d074473da5fef4b1d9ebbbb7f181edcb7a365a0.tar.gz rust-9d074473da5fef4b1d9ebbbb7f181edcb7a365a0.zip | |
Rollup merge of #40943 - Amanieu:offset_to, r=alexcrichton
Add ptr::offset_to This PR adds a method to calculate the signed distance (in number of elements) between two pointers. The resulting value can then be passed to `offset` to get one pointer from the other. This is similar to pointer subtraction in C/C++. There are 2 special cases: - If the distance is not a multiple of the element size then the result is rounded towards zero. (in C/C++ this is UB) - ZST return `None`, while normal types return `Some(isize)`. This forces the user to handle the ZST case in unsafe code. (C/C++ doesn't have ZSTs)
Diffstat (limited to 'src/test/run-pass/thinlto')
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