For types, make it optional to return a default value. While default
values for some types are meaningful, they are not meaningful for all
types (e.g., Action, Control, Parser, Parser state, etc.).
Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
The type system (and the value system) now include attributes
for each type (things like direction, const-ness).
Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
Will Hawkins