mpl_lang/
enc_regex.rs

1//! encoding for regular expressions.
2use std::{hash, ops::Deref};
3
4use regex::Regex;
5
6/// A wrapper around `regex::Regex` that can be serialized and deserialized via bincode
7#[derive(Debug, serde::Serialize, serde::Deserialize, Clone)]
8pub struct EncodableRegex(#[serde(with = "serde_regex")] Regex);
9
10impl PartialEq for EncodableRegex {
11    fn eq(&self, other: &Self) -> bool {
12        self.0.as_str() == other.0.as_str()
13    }
14}
15
16impl hash::Hash for EncodableRegex {
17    fn hash<H: hash::Hasher>(&self, state: &mut H) {
18        self.0.as_str().hash(state);
19    }
20}
21
22impl EncodableRegex {
23    /// Creates a new `EncodableRegex` from a regex pattern.
24    pub fn new<S: AsRef<str>>(pattern: S) -> Result<Self, regex::Error> {
25        Regex::new(pattern.as_ref()).map(EncodableRegex)
26    }
27}
28
29impl From<Regex> for EncodableRegex {
30    fn from(regex: Regex) -> Self {
31        EncodableRegex(regex)
32    }
33}
34impl AsRef<Regex> for EncodableRegex {
35    fn as_ref(&self) -> &Regex {
36        &self.0
37    }
38}
39
40impl Deref for EncodableRegex {
41    type Target = Regex;
42
43    fn deref(&self) -> &Self::Target {
44        &self.0
45    }
46}
47
48#[cfg(feature = "bincode")]
49mod bincode_impls {
50    use super::{EncodableRegex, Regex};
51
52    impl bincode::Encode for EncodableRegex {
53        fn encode<E: bincode::enc::Encoder>(
54            &self,
55            encoder: &mut E,
56        ) -> Result<(), bincode::error::EncodeError> {
57            self.0.as_str().encode(encoder)
58        }
59    }
60
61    impl<Context> bincode::Decode<Context> for EncodableRegex {
62        fn decode<D: bincode::de::Decoder>(
63            decoder: &mut D,
64        ) -> Result<Self, bincode::error::DecodeError> {
65            let regex_str: String = bincode::Decode::decode(decoder)?;
66            Regex::new(&regex_str)
67                .map(EncodableRegex)
68                .map_err(|_| bincode::error::DecodeError::Other("Invalid regex"))
69        }
70    }
71    bincode::impl_borrow_decode!(EncodableRegex);
72}
mpl_lang/enc_regex.rs

mpl_lang/
enc_regex.rs
