Add headers, clang-format, decompctx.py & more

Former-commit-id: 53f8d3cba7

include/rstl/pair.hpp

@@ -0,0 +1,18 @@
+#ifndef _RSTL_PAIR_HPP
+#define _RSTL_PAIR_HPP
+
+#include "types.h"
+
+namespace rstl {
+template < typename L, typename R >
+class pair {
+public:
+  L first;
+  R second;
+
+  inline pair() {}
+  inline pair(const L& first, const R& second) : first(first), second(second) {}
+};
+} // namespace rstl
+
+#endif