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Derive PartialEq, Serialize, Deserialize and Reflect on primitives (b…
…evyengine#11514) # 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.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| //! This module defines serialization/deserialization for const generic arrays. | ||
| //! Unlike serde's default behavior, it supports arbitrarily large arrays. | ||
| //! The code is based on this github comment: | ||
| //! <https://github.com/serde-rs/serde/issues/1937#issuecomment-812137971> | ||
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| pub(crate) mod array { | ||
| use serde::{ | ||
| de::{SeqAccess, Visitor}, | ||
| ser::SerializeTuple, | ||
| Deserialize, Deserializer, Serialize, Serializer, | ||
| }; | ||
| use std::marker::PhantomData; | ||
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| pub fn serialize<S: Serializer, T: Serialize, const N: usize>( | ||
| data: &[T; N], | ||
| ser: S, | ||
| ) -> Result<S::Ok, S::Error> { | ||
| let mut s = ser.serialize_tuple(N)?; | ||
| for item in data { | ||
| s.serialize_element(item)?; | ||
| } | ||
| s.end() | ||
| } | ||
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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> | ||
| where | ||
| T: Deserialize<'de>, | ||
| { | ||
| type Value = [T; N]; | ||
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| fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { | ||
| formatter.write_str(&format!("an array of length {}", N)) | ||
| } | ||
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| #[inline] | ||
| fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> | ||
| where | ||
| A: SeqAccess<'de>, | ||
| { | ||
| let mut data = Vec::with_capacity(N); | ||
| for _ in 0..N { | ||
| match (seq.next_element())? { | ||
| Some(val) => data.push(val), | ||
| None => return Err(serde::de::Error::invalid_length(N, &self)), | ||
| } | ||
| } | ||
| match data.try_into() { | ||
| Ok(arr) => Ok(arr), | ||
| Err(_) => unreachable!(), | ||
| } | ||
| } | ||
| } | ||
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| pub fn deserialize<'de, D, T, const N: usize>(deserializer: D) -> Result<[T; N], D::Error> | ||
| where | ||
| D: Deserializer<'de>, | ||
| T: Deserialize<'de>, | ||
| { | ||
| deserializer.deserialize_tuple(N, GenericArrayVisitor::<T, N>(PhantomData)) | ||
| } | ||
| } |
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