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doc all differences of ptr:copy(_nonoverlapping) with memcpy and memmove

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Marijn Schouten 2025-01-31 17:29:45 +01:00
parent 7f36543a48
commit 8156e062ee
1 changed files with 6 additions and 3 deletions
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9
library/core/src/intrinsics/mod.rs
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@ -4250,7 +4250,8 @@ pub const fn ptr_metadata<P: ptr::Pointee<Metadata = M> + ?Sized, M>(_ptr: *cons
/// For regions of memory which might overlap, use [`copy`] instead.
///
/// `copy_nonoverlapping` is semantically equivalent to C's [`memcpy`], but
/// with the argument order swapped.
/// with the source and destination arguments swapped,
/// and `count` counting the number of `T`s instead of bytes.
///
/// The copy is "untyped" in the sense that data may be uninitialized or otherwise violate the
/// requirements of `T`. The initialization state is preserved exactly.
@ -4377,8 +4378,10 @@ pub const unsafe fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: us
/// If the source and destination will *never* overlap,
/// [`copy_nonoverlapping`] can be used instead.
///
/// `copy` is semantically equivalent to C's [`memmove`], but with the argument
/// order swapped. Copying takes place as if the bytes were copied from `src`
/// `copy` is semantically equivalent to C's [`memmove`], but
/// with the source and destination arguments swapped,
/// and `count` counting the number of `T`s instead of bytes.
/// Copying takes place as if the bytes were copied from `src`
/// to a temporary array and then copied from the array to `dst`.
///
/// The copy is "untyped" in the sense that data may be uninitialized or otherwise violate the