------- Additional Comments From bangerth at dealii dot org 2005-03-23 18:53 ------- Intuitively, C++ treats unnamed enums differently than named ones, because in templates the function/class name has to be mangled, and will contain the name of the template arguments. If the template argument doesn't have a name, then the compiler can't do its job, so the standard chose to disallow unnamed enums as template arguments. For more legalese, this is specified in section 14.3.1/2 of the standard, which says: 2 A local type, a type with no linkage, an unnamed type or a type compounded from any of these types shall not be used as a template- argument for a template type-parameter. [Example: ... Regards Wolfgang
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20589
