From b6dc495cf53e882d1c2e332d18322db1e8def9e4 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 26 Mar 2026 21:09:32 +0000
Subject: Serialize Patio compilation units to flatbuffers

---
 .../patio/serialization/PatioToFlatbuffers.java    | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/patio/serialization/PatioToFlatbuffers.java b/src/main/java/org/shedlang/compiler/patio/serialization/PatioToFlatbuffers.java
index 614f368c..e7dd1522 100644
--- a/src/main/java/org/shedlang/compiler/patio/serialization/PatioToFlatbuffers.java
+++ b/src/main/java/org/shedlang/compiler/patio/serialization/PatioToFlatbuffers.java
@@ -17,6 +17,46 @@ import java.util.Optional;
 import java.util.function.Function;
 
 public class PatioToFlatbuffers {
+    // == Compilation units ==
+
+    public static int serializeCompilationUnit(
+        FlatBufferBuilder builder,
+        PatioCompilationUnit compilationUnit
+    ) {
+        var sourceFbs = SourceToFlatbuffers.serializeSource(
+            builder,
+            compilationUnit.source(),
+            Optional.empty()
+        );
+
+        var elementsOffsetsFbs = compilationUnit.elements().stream()
+            .mapToInt(element -> serializeCompilationUnitElement(builder, element, compilationUnit.source()))
+            .toArray();
+        var elementsVectorFbs = PatioCompilationUnitFbs.createElementsVector(builder, elementsOffsetsFbs);
+
+        PatioCompilationUnitFbs.startPatioCompilationUnitFbs(builder);
+        PatioCompilationUnitFbs.addSource(builder, sourceFbs);
+        PatioCompilationUnitFbs.addElements(builder, elementsVectorFbs);
+        return PatioCompilationUnitFbs.endPatioCompilationUnitFbs(builder);
+    }
+
+    public static PatioCompilationUnit deserializeCompilationUnit(
+        PatioCompilationUnitFbs compilationUnitFbs
+    ) {
+        var source = SourceToFlatbuffers.deserializeSource(
+            compilationUnitFbs.source(),
+            Optional.empty()
+        );
+
+        var elements = deserializeVector(
+            compilationUnitFbs::elements,
+            compilationUnitFbs.elementsLength(),
+            elementFbs -> deserializeCompilationUnitElement(elementFbs, source)
+        );
+
+        return new PatioCompilationUnit(elements, source);
+    }
+
     // == Compilation unit elements ==
 
     public static int serializeCompilationUnitElement(
-- 
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