int FirstBit() const
The FirstBit
method returns the index of the first bit, i.e.
the set bit with the lowest index, in the OEBitVector
. Bit position
indices are numbered from zero, and have a maximum of
OEBitVector::GetSize()-1
.
If the OEBitVector
has no bits set, i.e.
OEBitVector::IsEmpty
returns true, this method return will return
the value -1.