Fixed

When a parameter is fixed, the effect is slightly different for numeric and structured parameters. In both cases, setting a fixed parameter in a design to a new value is illegal.

The effects of fixing a numeric parameter are described in the documentation for numeric parameters.

The effects of fixing a structured parameter are described in the documentation for choice parameters.

Note: The effect of fixing structured parameters is insufficiently tested.

Suggestions for Future Versions

Since the API already specifies an operation for producing [read-only] Design_read_only designs, thus (ideally) preventing parameters from being set to new values, perhaps the effect of fixing a parameter should be confined to the set of generated values.