module Utils::Patterns

def choose(argument, pattern_opts, default: ?f)

Raises:

(ArgumentError) - if the pattern option is not provided to the pattern matcher constructor
(ArgumentError) - if the argument does not match 'r' or 'f' patterns and is not nil

Returns:

(Utils::Patterns::Pattern) - a new instance of either RegexpPattern or FuzzyPattern

Parameters:

default (String) -- the default pattern type to use when argument is nil or empty
pattern_opts (Hash) -- the options to be passed to the pattern matcher constructor
argument (String) -- the argument string that determines the pattern type

def choose(argument, pattern_opts, default: ?f)
  case argument
  when /^r/, (default == ?r ? nil : :not)
    RegexpPattern.new(pattern_opts)
  when /^f/, (default == ?f ? nil : :not)
    FuzzyPattern.new(pattern_opts)
  else
    raise ArgumentError, 'argument -p has to be f=fuzzy or r=regexp'
  end
end

Instance Methods

# choose