Module: CLI::DSL::Cast

Included in:
Argument, Input, Option
Defined in:
lib/cli/dsl.rb

Instance Method Summary collapse

Instance Method Details

#cast(value) ⇒ Object 



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# File 'lib/cli/dsl.rb', line 16

def cast(value)
  begin
    cast_to = @options[:cast] or return value

    if cast_to.is_a? Module # all classes are modules
      if cast_to == Integer
        Integer(value)
      elsif cast_to == Float
        Float(value)
      elsif cast_to.respond_to? :new
        cast_to.new(value)
      elsif cast_to.respond_to? :load
        cast_to.load(value)
      else
        raise ArgumentError, "can't cast to class or module #{cast_to.class.name}"
      end
    else
      if cast_to.is_a? Proc
        cast_to.call(value)
      else
        raise ArgumentError, "can't cast to instance of #{cast_to.class.name}"
      end
    end
  rescue => e
    raise ParsingError::CastError.new(@name, @options[:cast].respond_to?(:name) ? @options[:cast].name : @options[:cast], e)
  end
end