if seq --version 2>/dev/null > /dev/null #GNU
	complete -c seq -s f -l format -d 'Use printf style floating-point FORMAT'
	complete -c seq -s s -l separator -d 'Use STRING to separate numbers'
	complete -c seq -s w -l equal-width -d 'Equalize width with leading zeroes'
	complete -c seq -l help -d 'Display this help'
	complete -c seq -l version -d 'Output version information'
else #OS X
	complete -c seq -s f -d 'Use printf style floating-point FORMAT'
	complete -c seq -s s -d 'Use STRING to separate numbers'
	complete -c seq -s w -d 'Equalize width with leading zeroes'
	complete -c seq -s t -d 'Use STRING to terminate sequence of numbers'
end