Fix verifier supporting namespaced tags with special @{tag} syntax

lib/yard/verifier.rb

@@ -140,8 +140,8 @@ def __execute; #{expr}; end
     #
     # @return [String] the parsed expression
     def parse_expression(expr)
-      expr = expr.gsub(/@@([\w\.]+)/, 'object.tags("\1")')
-      expr = expr.gsub(/@([\w\.]+)/, 'object.tag("\1")')
+      expr = expr.gsub(/@@(?:(\w+)|\{([\w\.]+)\})/, 'object.tags("\1\2")')
+      expr = expr.gsub(/@(?:(\w+)|\{([\w\.]+)\})/, 'object.tag("\1\2")')
       expr
     end
   end

spec/verifier_spec.rb

@@ -19,10 +19,24 @@
       Verifier.new('@@return').call(obj)
     end
 
-    it "should allow namespaced tags" do
+    it "should allow namespaced tag using @{} syntax" do
       obj = mock(:object)
       obj.should_receive(:tag).with('yard.return')
-      Verifier.new('@yard.return').call(obj)
+      Verifier.new('@{yard.return}').call(obj)
+    end
+
+    it "should allow namespaced tags using @{} syntax" do
+      obj = mock(:object)
+      obj.should_receive(:tags).with('yard.return')
+      Verifier.new('@@{yard.return}').call(obj)
+    end
+
+    it "should call methods on tag object" do
+      obj = mock(:object)
+      obj2 = mock(:tag)
+      obj.should_receive(:tag).with('return').and_return obj2
+      obj2.should_receive(:foo)
+      Verifier.new('@return.foo').call(obj)
     end
 
     it "should send any missing methods to object" do