my-emacs-d/elpa/yasnippet-20160924.2001/snippets/cc-mode/once

#name : #ifndef XXX; #define XXX; #endif
# key: once
# --
#ifndef ${1:`(upcase (file-name-nondirectory (file-name-sans-extension (buffer-file-name))))`_H}
#define $1

$0

#endif /* $1 */