Change the creation/deletion of tangibles so that the tangible database is never really deleted.

luprex/cpp/core/world-testing.cpp

@@ -55,14 +55,11 @@ eng::string World::tangible_pprint(int64_t id) const {
     LS.rawget(tan, tangibles, id);
     eng::ostringstream oss;
     if (LS.istable(tan)) {
-        LS.getmetatable(meta, tan);
-        LS.clearmetatable(tan);
         PrettyPrintOptions opts;
         opts.indent = false;
         pprint(LS, tan, opts, &oss);
-        LS.setmetatable(tan, meta);
     } else {
-        oss << "<no such tangible: " << id << ">";
+        oss << "<no such tangible " << id << ">{}";
     }
     LS.result();
     return oss.str();
@@ -384,7 +381,7 @@ LuaDefine(unittests_world3diffluatab, "", "some unit tests") {
 
     // The data in the master model should now look like this:
     const char *expect_123 =
-        "{ "
+        "<tangible 123>{ "
             "bacon='crispy', "
             "inventory={ gold='wealthy' }, "
             "skills={ "
@@ -393,7 +390,7 @@ LuaDefine(unittests_world3diffluatab, "", "some unit tests") {
             "} "
         "}";
     const char *expect_345 =
-        "{ "
+        "<tangible 345>{ "
             "inventory={ gold='poor' }, "
             "phone='867-5309' "
         "}";