Type Info Base Classes

For each base VHDL type group there is a separate type info base class:

VHDL type group	type info base class
integer	integer_info_base
enumeration	enum_info_base
floating point	float_info_base
physical	physical_info_base
record	record_info_base
array	array_info_base
access	access_info_base
file	file_info_base

These type info base classes implement the virtual methods of the type_info_interface class. All concrete type info classes are derived from them.