755917fe4b
# Objective - Implement common traits on primitives ## Solution - Derive PartialEq on types that were missing it. - Derive Copy on small types that were missing it. - Derive Serialize/Deserialize if the feature on bevy_math is enabled. - Add a lot of cursed stuff to the bevy_reflect `impls` module.
64 lines
2.0 KiB
Rust
64 lines
2.0 KiB
Rust
//! This module defines serialization/deserialization for const generic arrays.
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//! Unlike serde's default behavior, it supports arbitrarily large arrays.
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//! The code is based on this github comment:
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//! <https://github.com/serde-rs/serde/issues/1937#issuecomment-812137971>
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pub(crate) mod array {
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use serde::{
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de::{SeqAccess, Visitor},
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ser::SerializeTuple,
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Deserialize, Deserializer, Serialize, Serializer,
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};
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use std::marker::PhantomData;
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pub fn serialize<S: Serializer, T: Serialize, const N: usize>(
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data: &[T; N],
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ser: S,
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) -> Result<S::Ok, S::Error> {
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let mut s = ser.serialize_tuple(N)?;
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for item in data {
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s.serialize_element(item)?;
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}
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s.end()
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}
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struct GenericArrayVisitor<T, const N: usize>(PhantomData<T>);
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impl<'de, T, const N: usize> Visitor<'de> for GenericArrayVisitor<T, N>
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where
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T: Deserialize<'de>,
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{
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type Value = [T; N];
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fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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formatter.write_str(&format!("an array of length {}", N))
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}
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#[inline]
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fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
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where
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A: SeqAccess<'de>,
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{
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let mut data = Vec::with_capacity(N);
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for _ in 0..N {
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match (seq.next_element())? {
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Some(val) => data.push(val),
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None => return Err(serde::de::Error::invalid_length(N, &self)),
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}
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}
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match data.try_into() {
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Ok(arr) => Ok(arr),
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Err(_) => unreachable!(),
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}
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}
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}
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pub fn deserialize<'de, D, T, const N: usize>(deserializer: D) -> Result<[T; N], 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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deserializer.deserialize_tuple(N, GenericArrayVisitor::<T, N>(PhantomData))
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}
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}
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