StructureMap: How to set lifecycle on types connected with ConnectImplementationsToTypesClosing

Question

In my registry I have

Scan(scanner =>
         {
             scanner.AssemblyContainingType<EmailValidation>();
             scanner.ConnectImplementationsToTypesClosing(typeof(IValidation<>));
         });

What am I supposed to do to define these all as Singletons?

Also as an aside to this question, is there any reason to not define everything that is stateless as a singleton object that's registered in StructureMap?

Answer 1

Kevin's answer is correct for versions 2.5.4 and older. In the current StructureMap trunk (and when 2.5.5+ is released), you can now do:

Scan(scanner =>
{
   scanner.AssemblyContainingType<EmailValidation>();
   scanner.ConnectImplementationsToTypesClosing(typeof(IValidation<>))
          .OnAddedPluginTypes(t => t.Singleton());
});