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Fix example in transmute; add safety requirement to Vec::from_raw_parts #44536

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merged 1 commit into from
Sep 15, 2017

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Havvy
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@Havvy Havvy commented Sep 13, 2017

This fixes the second bullet point on #44281 and also removes some incorrect information.

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r? @sfackler

(rust_highfive has picked a reviewer for you, use r? to override)

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looks good to me 👍

thanks @Havvy

/// // the original inner type (`&i32`) to the converted inner type
/// // (`Option<&i32>`), so read the nomicon pages linked above.
/// let v_from_raw = unsafe {
/// Vec::from_raw_parts(v_orig.as_mut_ptr(),
/// Vec::from_raw_parts(v_orig.as_mut_ptr() as *mut Option<&T>,
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You mean as *mut Option<&i32> here?

[01:05:15] ---- intrinsics.rs - intrinsics::transmute (line 837) stdout ----
[01:05:15] 	error[E0412]: cannot find type `T` in this scope
[01:05:15]   --> intrinsics.rs:29:61
[01:05:15]    |
[01:05:15] 29 |     Vec::from_raw_parts(v_orig.as_mut_ptr() as *mut Option<&T>,
[01:05:15]    |                                                             ^ not found in this scope

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🤦‍♂️ fixed

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@bors: r+ rollup

thanks!

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bors commented Sep 13, 2017

📌 Commit 9dd2ee1 has been approved by steveklabnik

GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Sep 13, 2017
Fix example in transmute; add safety requirement to Vec::from_raw_parts

This fixes the second bullet point on rust-lang#44281 and also removes some incorrect information.
@aidanhs aidanhs added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Sep 13, 2017
frewsxcv added a commit to frewsxcv/rust that referenced this pull request Sep 14, 2017
Fix example in transmute; add safety requirement to Vec::from_raw_parts

This fixes the second bullet point on rust-lang#44281 and also removes some incorrect information.
frewsxcv added a commit to frewsxcv/rust that referenced this pull request Sep 15, 2017
Fix example in transmute; add safety requirement to Vec::from_raw_parts

This fixes the second bullet point on rust-lang#44281 and also removes some incorrect information.
bors added a commit that referenced this pull request Sep 15, 2017
@bors bors merged commit 9dd2ee1 into rust-lang:master Sep 15, 2017
@Havvy Havvy deleted the transmute-docs branch September 18, 2017 08:00
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8 participants