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langref: clarify restricted @memcpy semantics

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mlugg 2025-01-29 06:51:23 +00:00 committed by Matthew Lugg
parent 107b65ec5d
commit 249a20d972
1 changed files with 2 additions and 3 deletions
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doc/langref.html.in
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@ -5120,9 +5120,8 @@ fn cmpxchgWeakButNotAtomic(comptime T: type, ptr: *T, expected_value: T, new_val
<p>{#syntax#}source{#endsyntax#} must be a slice, a pointer to
an array, or a many-item {#link|pointer|Pointers#}. It may
have any alignment, and it may have any element type.</p>
<p>The {#syntax#}source{#endsyntax#} element type must support {#link|Type Coercion#}
into the {#syntax#}dest{#endsyntax#} element type. The element types may have
different ABI size, however, that may incur a performance penalty.</p>
<p>The {#syntax#}source{#endsyntax#} element type must have the same in-memory
representation as the {#syntax#}dest{#endsyntax#} element type.</p>
<p>Similar to {#link|for#} loops, at least one of {#syntax#}source{#endsyntax#} and
{#syntax#}dest{#endsyntax#} must provide a length, and if two lengths are provided,
they must be equal.</p>