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22 lines
685 B
Rust
22 lines
685 B
Rust
use std::borrow::Cow;
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use heed::{BoxedError, BytesDecode, BytesEncode};
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/// A codec for values of type `&str`. Unlike `Str`, its `EItem` and `DItem` associated
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/// types are equivalent (= `&'a str`) and these values can reside within another structure.
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pub struct StrRefCodec;
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impl<'a> BytesEncode<'a> for StrRefCodec {
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type EItem = &'a str;
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fn bytes_encode(item: &'a &'a str) -> Result<Cow<'a, [u8]>, BoxedError> {
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Ok(Cow::Borrowed(item.as_bytes()))
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}
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}
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impl<'a> BytesDecode<'a> for StrRefCodec {
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type DItem = &'a str;
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fn bytes_decode(bytes: &'a [u8]) -> Result<Self::DItem, BoxedError> {
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std::str::from_utf8(bytes).map_err(Into::into)
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}
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}
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