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