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24 lines
536 B
Rust
24 lines
536 B
Rust
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use fst::Set;
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use std::borrow::Cow;
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use heed::{BytesDecode, BytesEncode};
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/// A codec for values of type `Set<&[u8]>`.
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pub struct FstSetCodec;
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impl<'a> BytesEncode<'a> for FstSetCodec {
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type EItem = Set<Vec<u8>>;
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fn bytes_encode(item: &'a Self::EItem) -> Option<Cow<'a, [u8]>> {
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Some(Cow::Borrowed(item.as_fst().as_bytes()))
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}
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}
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impl<'a> BytesDecode<'a> for FstSetCodec {
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type DItem = Set<&'a [u8]>;
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fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
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Some(Set::new(bytes).ok()?)
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}
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}
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