From b05f994e38a7d77b3c069a8bf6281ec36f6d2d8a Mon Sep 17 00:00:00 2001
From: chxry <floppa9@proton.me>
Date: Wed, 2 Oct 2024 22:52:29 +0100
Subject: [PATCH] Fix no_std compiles

---
 Cargo.toml            | 2 +-
 src/config/hashing.rs | 6 +++++-
 src/lib.rs            | 4 ++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index f3c1aaba2..8add432f4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ smallvec = { version = "1.7.0", default-features = false, features = ["union", "
 thin-vec = { version = "0.2.13", default-features = false }
 ahash = { version = "0.8.2", default-features = false, features = ["compile-time-rng"] }
 num-traits = { version = "0.2.0", default-features = false }
-once_cell = { version = "1.19.0", default-features = false, features = ["critical-section"] }
+once_cell = { version = "1.20.1", default-features = false, features = ["race", "portable-atomic", "alloc"] }
 bitflags = { version = "2.0.0", default-features = false }
 smartstring = { version = "1.0.0", default-features = false }
 rhai_codegen = { version = "2.1.0", path = "codegen" }
diff --git a/src/config/hashing.rs b/src/config/hashing.rs
index e6dcee9ae..cf7fcda5f 100644
--- a/src/config/hashing.rs
+++ b/src/config/hashing.rs
@@ -54,7 +54,11 @@ pub use crate::api::deprecated::config::hashing::{get_ahash_seed, set_ahash_seed
 /// ```
 #[inline(always)]
 pub fn set_hashing_seed(new_seed: Option<[u64; 4]>) -> Result<(), Option<[u64; 4]>> {
-    HASHING_SEED.set(new_seed)
+    #[cfg(feature = "std")]
+    return HASHING_SEED.set(new_seed);
+
+    #[cfg(not(feature = "std"))]
+    return HASHING_SEED.set(new_seed.into()).map_err(|err| *err);
 }
 
 /// Get the current hashing Seed.
diff --git a/src/lib.rs b/src/lib.rs
index f385c701a..d02314fad 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -220,8 +220,12 @@ type ExclusiveRange = std::ops::Range<INT>;
 /// An inclusive integer range.
 type InclusiveRange = std::ops::RangeInclusive<INT>;
 
+#[cfg(feature = "std")]
 use once_cell::sync::OnceCell;
 
+#[cfg(not(feature = "std"))]
+use once_cell::race::OnceBox as OnceCell;
+
 pub use api::build_type::{CustomType, TypeBuilder};
 #[cfg(not(feature = "no_custom_syntax"))]
 pub use api::custom_syntax::Expression;