Using clause generates error message

[ohz10]

Having a C++11 using clause (rather than a typedef) causes an error to be emitted using cldoc generate.

For example:
using SomeTypeDefine = AnExistingClass;

A work-around is to use typedef
typedef AnExistingClass SomeTypeDefine;

The using clause is the preferred c++11 way of doing typedefs, so it would be nice if this didn't cause errors generating documentation.

[ohz10]

The error generated is: Unhandled cursor: CursorKind.TYPE_ALIAS_DECL