Make Doxygen debug operator command usable with enums.

Doxyfile

@@ -202,7 +202,9 @@ TAB_SIZE               = 8
 # You can put \n's in the value part of an alias to insert newlines.
 
 ALIASES                = \
-    "debugoperator{1}=@relates \1\n@brief Debug output operator @xrefitem debugoperators \"Debug output operator\" \"Debug output operators for custom types\" Allows printing \1 with Corrade::Utility::Debug and friends." \
+    "debugoperator{1}=@relates \1\n@brief Debug output operator @xrefitem debugoperators \"Debug output operator\" \"Debug output operators for custom types\" Allows printing @ref \1 with @ref Corrade::Utility::Debug and friends." \
+    "debugoperatorenum{1}=\n@brief Debug output operator @xrefitem debugoperators \"Debug output operator\" \"Debug output operators for custom types\" Allows printing @ref \1 with @ref Corrade::Utility::Debug and friends." \
+    "debugoperatorclassenum{2}=@relates \1\n@brief Debug output operator @xrefitem debugoperators \"Debug output operator\" \"Debug output operators for custom types\" Allows printing @ref \2 with @ref Corrade::Utility::Debug and friends." \
     "configurationvalueref{1}=@see @ref configurationvalues \"Corrade::Utility::ConfigurationValue<\1>\"" \
     "configurationvalue{1}=@brief %Configuration value parser and writer @xrefitem configurationvalues \"Configuration value parser and writer\" \"Configuration value parsers and writers for custom types\" Allows parsing and writing \1 from and to Corrade::Utility::Configuration." \
     "collisionoccurenceoperator{2}=@relates \1\n@brief %Collision occurence of %\1 and %\2\n@see \2::operator%(const \1&) const" \