43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
//! Serde support for serializing Rust collections as Preserves sets.
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//!
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//! Serde doesn't include sets in its data model, so we do some somewhat awful tricks to force
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//! things to come out the way we want them.
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//!
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//! # Example
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//!
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//! Annotate collection-valued fields that you want to (en|de)code as Preserves `Set`s with
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//! `#[serde(with = "preserves::set")]`:
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//!
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//! ```rust
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//! #[derive(serde::Serialize, serde::Deserialize)]
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//! struct Example {
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//! #[serde(with = "preserves::set")]
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//! items: preserves::value::Set<String>,
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//! }
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//! ```
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use crate::value::{self, to_value, IOValue, UnwrappedIOValue};
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use serde::{Deserialize, Deserializer, Serialize, Serializer};
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use std::iter::IntoIterator;
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#[doc(hidden)]
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pub fn serialize<S, T, Item>(s: T, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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T: IntoIterator<Item = Item>,
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Item: Serialize,
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{
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let s = s.into_iter().map(to_value).collect::<value::Set<IOValue>>();
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UnwrappedIOValue::from(s).wrap().serialize(serializer)
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}
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#[doc(hidden)]
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pub fn deserialize<'de, D, T>(deserializer: D) -> Result<T, D::Error>
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where
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D: Deserializer<'de>,
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T: Deserialize<'de>,
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{
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// Relies on the way we hack around serde's data model in de.rs and value/de.rs.
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T::deserialize(deserializer)
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}
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