When concatenation expressions have aggregate arguments, we need to
get the type of the result down to the aggregate expressions so that
it can know how to interpret the elements.
When signals/variables are records, they are often referenced by
their members, using a prefix.name syntax. Parse that syntax and
generate "sorry" messages in elaboration.
Entity generics are easily implemented as module parameters, so make
it so. Give the parameters their default values from the generic declaration.
Array bounds may use values that cannot be evaluated right away, so
put off their evaluation.
Maciej Suminski
Cary R
Arun Persaud
Stephen Williams