Combine the sugar, water, corn syrup, and salt in a large heavy pan. Bring this mixture to a boil and continue boiling until it reaches a "hard ball stage" (265 degrees). Now, beat the egg whites until stiff, slowly pour the hot syrup above over the egg whites beating with a high speed on your mixer. Add vanilla, and continue to beat for 4-5 minutes or until the candy starts to take shape. Fold in nuts and cherries. Quickly drop teaspoon size pieces of the candy onto a buttered cookie sheet.