Class: RArg::DefinitionContext

Inherits:
Object
  • Object
show all
Defined in:
lib/rarg.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DefinitionContext

Returns a new instance of DefinitionContext.



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# File 'lib/rarg.rb', line 32

def initialize
	@required = []
	@defaults = {}
	@aliases = {}
end

Instance Method Details

#parse(args) ⇒ Object 



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# File 'lib/rarg.rb', line 38

def parse(args)
	base = {}

	@defaults.each_pair do |name, value|
		unless args.include?(name) then
			base[name] = value
		end
	end
	
	args.each_pair do |name, value|
		# solve aliases
		if @aliases.include?(name) then
			real_name = @aliases[name]
		else
			real_name = name
		end
		
		# check defined or not
		if not @required.include?(real_name) and not @defaults.include?(real_name) then
			raise Error, "'#{real_name}' is not defined"
		end
		
		base[real_name] = value
	end
	
	if (missing = @required.find{|x| not base.include?(x)}) then
		raise Error, "argument of '#{missing}' is required, but missing"
	end
	

	
	return ParseResult.new(base)
end