Type check pointer dereferencing

source/result.cpp

@@ -1,5 +1,4 @@
 #include "elna/source/result.hpp"
-#include "elna/source/types.hpp"
 
 namespace elna::source
 {
@@ -33,4 +32,15 @@ namespace elna::source
     {
         return "Name '" + name + "' was already defined";
     }
+
+    type_mismatch::type_mismatch(std::shared_ptr<const type> got, operation kind, const std::filesystem::path& path,
+            const struct position position)
+        : error(path, position), kind(kind), got(got)
+    {
+    }
+
+    std::string type_mismatch::what() const
+    {
+        return "Type cannot be used here.";
+    }
 }