Emacs skeleton for C++ header files.

auto-insert-cxx.el

(add-hook 'find-file-hook 'auto-insert)
(setq auto-insert-alist
      '(("\\.hpp\\'"
         nil
         '(setq v1 (read-string "Namespace: " "cybozu"))
         '(setq v2 (upcase (concat v1 "_"
                                   (file-name-nondirectory
                                    (file-name-sans-extension buffer-file-name))
                                   "_" (file-name-extension buffer-file-name))))
         "// " (file-name-nondirectory buffer-file-name) n
         "// (C) " (format-time-string "%Y") " Cybozu." n n
         "#ifndef " v2 n
         "#define " v2 n n
         "namespace " v1 " {" n n
         _ n n
         "} // namespace " v1 n n
         "#endif // " v2)))

This will insert the following skeleton to empty C++ header files.

// FILENAME
// (C) YEAR Cybozu.

#ifndef NAMESPACE_FILENAME
#define NAMESPACE_FILENAME

namespace NAMESPACE {

} // namespace NAMESPACE

#endif // NAMESPACE_FILENAME

NAMESPACE is inputted from the mini buffer.