P1076 April 07, 2016 Meeting Minutes

Attendees:

• Rob Gaddi, Lieven Lemiengre, Jim Lewis, Brent Hayhoe, Ernst Christen, Patrick Lehmann

Agenda:

Meeting Discussion

• What's Next - see PrivateDocuments file: _summary_vhdl_requirements_priority.xlsx
• Restart at line 60
• 60: Array Type Generics
  • Currently cannot do array type operations on a generic type
  • No way to enforce that the actual is an array type
  • May overlap with abstract packages
  • May overlap with anonymous types discussion
  • Should we be able to restricted a type to a scalar type or an array type.
    • Current sense of the language is that the object is limited to operations on a scalar type
• 63: Abstract Packages
  • Skipped to here due to overlap with 60
  • Currently can pass functions
  • Ernst: Alternative make checking generic package is to parse a generic package as a template and defer the checking until compiling a generic package instance
  • Lieven would prefer to use an abstract package
• 61: New Predefined Attributes: 'actual and 'formal
  • For integers want to know the range of the actual that is passed to a subprogram vs having to pass 'low and 'high as parameters
  • Would not always want to do this as it would slow down all subprograms as the 'low and 'high would need to be implicitly passed by the simulator.
  • May need to be reconsidered with the integer extensions
  • Alternative: make range a first class object and have the range explicitly passed in the subprogram
  • Also see: RangeOperations
  • Could create an explicit range record. Make 'range available to return the record type.
  • solvable?
  • Nice and useful to have but not exactly must have for the level of complexity and/or time required for this proposal
  • Push to next revision
• 62: Conditional Compilation
  • If limited to only predefined names is it enough?
    • Tool type (sim, synth), vendor name, tool name, tool revision, language revision
  • Could use tool directives similar to encryption
  • Lexing time vs. Parsing time?
  • Still contentious, need to talk about this again.
• Next Meeting discuss interfaces/bundles

Review and Approve Meeting Minutes:

Rob, Brent

Next Meeting: Thursday April 14, 2016, 11 am Pacific

Previous Meeting: Thursday March 31, 2016