lib/rbs/namespace.rb in rbs-2.6.0 vs lib/rbs/namespace.rb in rbs-2.7.0.pre.1

@@ -1,20 +1,22 @@
+# frozen_string_literal: true
+
 module RBS
   class Namespace
     attr_reader :path
 
     def initialize(path:, absolute:)
       @path = path
-      @absolute = absolute
+      @absolute = absolute ? true : false
     end
 
     def self.empty
-      new(path: [], absolute: false)
+      @empty ||= new(path: [], absolute: false)
     end
 
     def self.root
-      new(path: [], absolute: true)
+      @root ||= new(path: [], absolute: true)
     end
 
     def +(other)
       if other.absolute?
         other
@@ -26,11 +28,13 @@
     def append(component)
       self.class.new(path: path + [component], absolute: absolute?)
     end
 
     def parent
-      raise "Parent with empty namespace" if empty?
-      self.class.new(path: path.take(path.size - 1), absolute: absolute?)
+      @parent ||= begin
+        raise "Parent with empty namespace" if empty?
+        self.class.new(path: path.take(path.size - 1), absolute: absolute?)
+      end
     end
 
     def absolute?
       @absolute
     end