C ++不命名类型

FxSmartPtr<FxStreamable> able(FcNew,stream->StreamInObject());

FxGlobalPair pair(id,able);

FxGlobalPair pair(id,able);

able is not a type

FxGlobalPair pair(id,FxSmartPtr<FxStreamable>::able);

error: \'class FxSmartPtr<FxStreamable>::able\' has not been declared

typedef pair<FxID, FxSmartPtr<FxStreamable> > FxGlobalPair;