restructure more

ThirdParty/entt/test/lib/view/plugin/plugin.cpp

@@ -0,0 +1,19 @@
+#include <cr.h>
+#include "../types.h"
+
+CR_EXPORT int cr_main(cr_plugin *ctx, cr_op operation) {
+    switch(operation) {
+    case CR_STEP: {
+        // unset filter fallback should not be accessible across boundaries
+        auto &view = *static_cast<view_type *>(ctx->userdata);
+        ctx->userdata = view.storage<1u>();
+    } break;
+    case CR_CLOSE:
+    case CR_LOAD:
+    case CR_UNLOAD:
+        // nothing to do here, this is only a test.
+        break;
+    }
+
+    return 0;
+}