Class: XDry::SelectorDef

Inherits:
Object
  • Object
show all
Defined in:
lib/xdry/parsing/parts/selectors.rb

Direct Known Subclasses

CompoundSelectorDef, SimpleSelectorDef

Class Method Summary collapse

Class Method Details

.parse(string) ⇒ Object 



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# File 'lib/xdry/parsing/parts/selectors.rb', line 6

def self.parse string
  string = string.strip
  if string =~ /^\w+$/
    SimpleSelectorDef.new(string)
  else
    comps = string.split(/\s+(?!\*)/).collect do |component_string|
      if component_string =~ /^(\w+:)\s*(?:\(([^)]+)\)\s*)?(\w*)$/
        keyword, type_decl, arg_name = $1, $2, $3
        type = if type_decl then VarType.parse(type_decl) else nil end
        SelectorComponent.new(keyword, arg_name, type)
      else
        raise StandardError, "Cannot parse selector component '#{component_string}' for selector '#{string}'"
      end
    end
    CompoundSelectorDef.new(comps)
  end
end