"glam" and "arrayvec" features compatible with no_std

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Test (all-features)
         run: cargo test --all-features
       - name: Test (no_std)
-        run: cargo test --no-default-features --features derive,serde
+        run: cargo test --no-default-features --features derive,serde,glam,arrayvec
       - name: Install i686 and GCC multilib
         run: rustup target add i686-unknown-linux-gnu && sudo apt update && sudo apt install -y gcc-multilib
       - name: Test (32-bit all-features)

Cargo.toml

@@ -17,7 +17,7 @@ exclude = ["fuzz/"]
 arrayvec = { version = "0.7", default-features = false, optional = true }
 bitcode_derive = { version = "0.6.0", path = "./bitcode_derive", optional = true }
 bytemuck = { version = "1.14", features = [ "min_const_generics", "must_cast" ] }
-glam = { version = ">=0.21", default-features = false, features = [ "std" ], optional = true }
+glam = { version = ">=0.21", default-features = false, optional = true }
 serde = { version = "1.0", default-features = false, features = [ "alloc" ], optional = true }
 
 [dev-dependencies]
@@ -37,7 +37,7 @@ zstd = "0.13.0"
 
 [features]
 derive = [ "bitcode_derive" ]
-std = [ "serde?/std" ]
+std = [ "serde?/std", "glam?/std", "arrayvec?/std" ]
 default = [ "derive", "std" ]
 
 [package.metadata.docs.rs]

src/ext/arrayvec.rs

@@ -4,7 +4,7 @@ use crate::derive::{Decode, Encode};
 use crate::error::err;
 use crate::str::{StrDecoder, StrEncoder};
 use arrayvec::{ArrayString, ArrayVec};
-use std::mem::MaybeUninit;
+use core::mem::MaybeUninit;
 
 // TODO optimize ArrayVec impls and make ArrayString use them.
 impl<const N: usize> Encoder<ArrayString<N>> for StrEncoder {
@@ -111,7 +111,7 @@ fn as_slice_assert_len<T, const N: usize>(t: &ArrayVec<T, N>) -> &[T] {
     let s = t.as_slice();
     // Safety: ArrayVec<N> has length <= N. TODO replace with LengthDecoder<N>.
     if s.len() > N {
-        unsafe { std::hint::unreachable_unchecked() };
+        unsafe { core::hint::unreachable_unchecked() };
     }
     s
 }
@@ -173,6 +173,7 @@ impl<'a, T: Decode<'a>, const N: usize> Decode<'a> for ArrayVec<T, N> {
 #[cfg(test)]
 mod tests {
     use crate::{decode, encode};
+    use alloc::vec::Vec;
     use arrayvec::{ArrayString, ArrayVec};
 
     // Smaller set of tests for ArrayString than ArrayVec they share VecEncoder/LengthDecoder.

src/ext/glam.rs

@@ -1,4 +1,5 @@
 use super::impl_struct;
+use alloc::vec::Vec;
 use glam::*;
 
 trait Affine3AExt {
@@ -43,6 +44,7 @@ impl_glam!(bool, BVec2, BVec3, BVec4);
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec::Vec;
     use glam::Vec2;
     fn bench_data() -> Vec<Vec2> {
         crate::random_data(1000)

src/ext/mod.rs

@@ -29,7 +29,7 @@ macro_rules! impl_struct {
                     )+
                 }
 
-                fn reserve(&mut self, additional: std::num::NonZeroUsize) {
+                fn reserve(&mut self, additional: core::num::NonZeroUsize) {
                     $(
                         self.$f.reserve(additional);
                     )+

src/serde/mod.rs

@@ -39,7 +39,7 @@ fn get_mut_or_resize<T: Default>(vec: &mut Vec<T>, index: usize) -> &mut T {
     unsafe { vec.get_unchecked_mut(index) }
 }
 
-//#[cfg(not(feature = "std"))]
+#[cfg(not(feature = "std"))]
 impl serde::ser::StdError for Error {}
 
 impl serde::ser::Error for Error {