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feat(spansy): add AsRef<Span<[u8]>> impl for Span<str> #20

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Feb 8, 2024
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feat(spansy): add AsRef<Span<[u8]>> impl for Span<str> #20

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10 changes: 10 additions & 0 deletions spansy/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -169,6 +169,16 @@ impl Span<str> {
}
}

impl AsRef<Span<[u8]>> for Span<str> {
fn as_ref(&self) -> &Span<[u8]> {
// # Safety
// Span<str> can be safely converted to Span<[u8]> because they have
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// an identical layout and only differ in the phantom type parameter
// which is a ZST.
unsafe { &*(self as *const Span<str> as *const Span<[u8]>) }
}
}

impl AsRef<str> for Span<str> {
fn as_ref(&self) -> &str {
// # Safety
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