1 files changed, 9 insertions, 2 deletions
diff --git a/src/main/java/org/zwobble/couscous/values/MethodValue.java b/src/main/java/org/zwobble/couscous/values/MethodValue.java
index fe23f94..df53722 100644
--- a/src/main/java/org/zwobble/couscous/values/MethodValue.java
+++ b/src/main/java/org/zwobble/couscous/values/MethodValue.java
@@ -2,6 +2,7 @@ package org.zwobble.couscous.values;
 
 import java.util.List;
 import java.util.function.BiFunction;
+import java.util.function.Supplier;
 
 import org.zwobble.couscous.interpreter.Arguments;
 
@@ -10,11 +11,17 @@ import lombok.Getter;
 import lombok.Value;
 
 @Value
-public class MethodValue<T> {
-    List<ConcreteType<?>> argumentTypes;
+public class MethodValue<T> implements Callable {
+    @Getter(value=AccessLevel.NONE)
+    Supplier<List<ConcreteType<?>>> argumentTypes;
     @Getter(value=AccessLevel.NONE)
     BiFunction<T, Arguments, InterpreterValue> apply;
     
+    @Override
+    public List<ConcreteType<?>> getArgumentTypes() {
+        return argumentTypes.get();
+    }
+    
     public InterpreterValue apply(T receiver, Arguments arguments) {
         return apply.apply(receiver, arguments);
     }