Parse command-line arguments from a docopt string

If specified arguments are not valid, this function will print the usage information and exit the program with status=1.

parse_args(usage, args = commandArgs(TRUE), types = list())

Arguments

usage	a docopt string describing program usage
args	a list of command-line arguments
types	an optional list of types to which specific arguments should be coerced, e.g. list(num_cores="integer")

Value

a list of parsed arguments