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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
use crate::codepointtrie::{CodePointTrie, CodePointTrieHeader, TrieValue};
use serde::{de::Error, Deserialize, Deserializer, Serialize, Serializer};
use zerofrom::ZeroFrom;
use zerovec::ZeroVec;
#[derive(Serialize, Deserialize)]
pub struct CodePointTrieSerde<'trie, T: TrieValue> {
header: CodePointTrieHeader,
#[serde(borrow)]
index: ZeroVec<'trie, u16>,
#[serde(borrow)]
data: ZeroVec<'trie, T>,
}
impl<'trie, T: TrieValue + Serialize> Serialize for CodePointTrie<'trie, T> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let ser = CodePointTrieSerde {
header: self.header,
index: ZeroFrom::zero_from(&self.index),
data: ZeroFrom::zero_from(&self.data),
};
ser.serialize(serializer)
}
}
impl<'de, 'trie, T: TrieValue + Deserialize<'de>> Deserialize<'de> for CodePointTrie<'trie, T>
where
'de: 'trie,
{
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let de = CodePointTrieSerde::deserialize(deserializer)?;
let error_value = de.data.last().ok_or_else(|| {
D::Error::custom("CodePointTrie vector must have at least one element")
})?;
Ok(CodePointTrie {
header: de.header,
index: de.index,
data: de.data,
error_value,
})
}
}