It is a common practice to insert header guards into C/C++ header files to allow a header to be included multiple times. A header guard for file HeaderName.h typically looks something like this:

#ifndef HEADERNAME_H
#define HEADERNAME_H

  ...header content...

#endif /* HEADERNAME_H */

Headerguard provides methods for inserting and updating header guards, and for tailoring the header guard style to fit local conventions. It checks for a pre-existing header guard, and if found, modifies the existing guard in-place.

See documentation in doc/headerguard.txt for installation, customization, and usage instructions.

Developed by Michael Henry (vim at drmikehenry.com).

Distributed under Vim's license.

Git repository: https://github.com/drmikehenry/vim-headerguard