Continue work on CActor::UpdateAnimation; lots of headers n stuff

Former-commit-id: 85284f7640

include/rstl/construction_deferred.hpp

@@ -0,0 +1,37 @@
+#ifndef _RSTL_CONSTRUCTION_DEFERRED_HPP
+#define _RSTL_CONSTRUCTION_DEFERRED_HPP
+
+#include "types.h"
+
+#include "rstl/construct.hpp"
+
+namespace rstl {
+template < typename T >
+class construction_deferred {
+public:
+  construction_deferred() : m_valid(false) {}
+
+  template < typename A >
+  void build(const A& arg) {
+    rstl::construct(get_ptr(), arg);
+    makeValid();
+  }
+  void clear(); // TODO
+  bool valid() const { return m_valid; }
+
+  T* get_ptr() { return reinterpret_cast< T* >(x0_data); }
+  T& data() {
+    // TODO ensureIsValid
+    return *get_ptr();
+  }
+  T& operator*() { return data(); }
+
+private:
+  u8 x0_data[sizeof(T)];
+  bool m_valid __attribute__((aligned(4)));
+
+  void makeValid() { m_valid = true; }
+};
+} // namespace rstl
+
+#endif