fix(lib): generate same code on big-endian platforms (#431)

* fix(lib): generate same code on big-endian platforms * Update logos-codegen/src/graph/mod.rs Co-authored-by: Jérome Eertmans <[email protected]> --------- Co-authored-by: Jérome Eertmans <[email protected]>
maciejhirsz · Oct 17, 2024 · 3c81ceb · 3c81ceb
1 parent 0f361d6
commit 3c81ceb
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/logos-codegen/src/graph/mod.rs b/logos-codegen/src/graph/mod.rs
@@ -58,9 +58,19 @@ pub trait Disambiguate {
 
 /// Id of a Node in the graph. `NodeId` can be referencing an empty
 /// slot that is going to be populated later in time.
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
 pub struct NodeId(NonZeroU32);
 
+impl Hash for NodeId {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        // Always use little-endian byte order for hashing to avoid
+        // different code generation on big-endian platforms due to
+        // iteration over a HashMap,
+        // see https://github.com/maciejhirsz/logos/issues/427.
+        state.write(&self.0.get().to_le_bytes())
+    }
+}
+
 impl NodeId {
     fn get(self) -> usize {
         self.0.get() as usize