Extern C support for creating NilEvalValue

src/Evaluator/EvalValues/EvalValue.cpp

@@ -1,6 +1,7 @@
 #include "EvalValue.hpp"
 #include "NumericEvalValue.hpp"
 #include "StringEvalValue.hpp"
+#include "NilEvalValue.hpp"
 #include <cstring>
 #include <memory>
 
@@ -52,6 +53,11 @@ namespace Porygon::Evaluation {
     EvalValue *CreateStringEvalValue(const char16_t *s) {
         return new StringEvalValue(s);
     }
+
+    EvalValue *CreateNilEvalValue() {
+        return new NilEvalValue();
+    }
+
     }
 }