Class: RArg::DefinitionContext
- Inherits:
-
Object
- Object
- RArg::DefinitionContext
- Defined in:
- lib/rarg.rb
Instance Method Summary collapse
-
#initialize ⇒ DefinitionContext
constructor
A new instance of DefinitionContext.
- #parse(args) ⇒ Object
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 |