More new IRs and some comments.

Two new IRs have been received and are in the data base at eda.org

2059 Submitted Upper/lower case character mapping is not clear
2060 Submitted Include truth table for multi-input/multi-output logic.

Comments on

2058 Submitted Does USE of type name make operators and literals visible?

This has been bouncing around on comp.lang.vhdl for some time. Our support group has received several
questions about this. It appears that implementations differ in interpretations.

There are several issues to consider.

1. If you USE a type does that use make the operators and/or the enumeration literals directly visible?

2a. If you USE a subtype, do the operators and/or enumeration literals become visible
2b. Remember that technically INTEGER is a subtype, not a type: so if you use what Ada calls
the first named subtype do the operators and/or enumeration literals become visible.

3. Ada has addressed this issue by adding a USE TYPE construct.

4. These issues may possible be influenced by Peter's work on generic types, or there
may be a new set of visibility questions raised.

Please think about this stuff before our next meeting.
Received on Wed Jan 26 09:36:31 2005