#compdef pihex _pihex() { _arguments -S \ '--formula=[Formula to use]:formula name:(( bbp\:"Bailey-Borwein-Plouffe formula (default)" bellard\:"Bellard'\''s formula"))' \ '1: :_guard "^-*" "place of digits (default: 0)"' \ '(- 1 *)'{-V,--version}'[Prints version information]' \ '(- 1 *)'{-h,--help}'[Prints help information]' }