Update the ways to get a pointer from a box in std::ptr docs #23312
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r? @huonw (rust_highfive has picked a reviewer for you, use r? to override) |
| //! types are the same size. Because `Box<T>` and `*mut T` have the same | ||
| //! representation they can be trivially, | ||
| //! though unsafely, transformed from one type to the other. | ||
| //! The `into_raw` function consumes an onwed box and returns |
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just 'box' not 'owned box'
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r=me after some nits |
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Fixed the typos. |
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There's "owned box" in the subsection title. Not sure if "owned" should be removed there too |
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Yes, it should be, that term isn't used anymore. |
Show how to get a pointer without destroying the box. Use `boxed::into_raw` instead of `mem::transmute`.
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Done! |
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@bors: r+ rollup |
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Show how to get a pointer without destroying the box. Use `boxed::into_raw` instead of `mem::transmute`. I removed the `let my_num: *const i32 = mem::transmute(my_num);` case altogether because we own the box, a `*mut` pointer is good anywhere a `*const` is needed, `from_raw` takes a mutable pointer and casting from a `*const` caused an ICE.
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@gkoz: ICE? Did you file that? |
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Show how to get a pointer without destroying the box.
Use
boxed::into_rawinstead ofmem::transmute.I removed the
let my_num: *const i32 = mem::transmute(my_num);case altogether because we own the box, a*mutpointer is good anywhere a*constis needed,from_rawtakes a mutable pointer and casting from a*constcaused an ICE.