1 files changed, 12 insertions, 1 deletions
diff --git a/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java b/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
index bad4f72c..da20c770 100644
--- a/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
+++ b/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
@@ -114,6 +114,17 @@ public class StackCompiler {
         return context;
     }
 
+    private static Context compileEffectDefinition(
+        TypedEffectDefinitionNode node,
+        Context context
+    ) {
+        var localName = context.shedVariableToLocal(node.effect().name());
+
+        return context
+            .addInstruction(new DefineEffectInstruction(node.effect(), node.source()))
+            .addInstruction(new LocalStoreInstruction(localName, node.source()));
+    }
+
     public static Context compileExpression(TypedExpressionNode node, Context context) {
         return switch (node) {
             case TypedBinaryOperationNode typedBinaryOperationNode ->
@@ -450,7 +461,7 @@ public class StackCompiler {
                 compileAssign(assign, context);
 
             case TypedEffectDefinitionNode effectDefinition ->
-                throw new UnsupportedOperationException("TODO");
+                compileEffectDefinition(effectDefinition, context);
 
             case TypedFunctionDefinitionNode functionDefinition ->
                 compileFunctionDefinition(functionDefinition, context);