Command line suggestions with Boost

While working on Brayns I got tired of mistyping and forgetting command line arguments. I therefore wanted to add suggestions for unrecognized options similar to what git is doing. I could not find any examples of doing this with boost program options so therefore I provide a minimal example here in the hope it will be useful. The algorithm uses the Levenshtein distance to determine the similarity between strings. It also tries to match arguments which are a substring of a known option. Download here. Example usage:

jonas@x220 ~> c++ program_options_suggestion_example.cpp -lboost_program_options -o example
jonas@x220 ~> ./example --bat
Unrecognized option '--bat'.

Most similar options are:
	--bar
	--baz