lib/solve/errors.rb in solve-0.6.1 vs lib/solve/errors.rb in solve-0.7.0

@@ -29,7 +29,21 @@
         "'#{constraint}' did not contain a valid operator or a valid version string."
       end
     end
 
     class NoSolutionError < SolveError; end
+
+    class UnsortableSolutionError < SolveError
+      attr_reader :internal_exception
+      attr_reader :unsorted_solution
+
+      def initialize(internal_exception, unsorted_solution)
+        @internal_exception = internal_exception
+        @unsorted_solution  = unsorted_solution
+      end
+
+      def to_s
+        "The solution contains a cycle and cannot be topologically sorted. See #unsorted_solution on this exception for the unsorted solution"
+      end
+    end
   end
 end