P4 Language Specification Document (https://p4.org/p4-spec/docs/P4-16-working-spec.html#sec-control) specifies that control declarations (along with parser declarations) cannot have generic values in them. ControlTypeDeclaration can have generic types in them but not ControlDeclaration. But p4c allows that happen as in the case of generic.p4i
P4 Language Specification Document (https://p4.org/p4-spec/docs/P4-16-working-spec.html#sec-control) specifies that control declarations (along with parser declarations) cannot have generic values in them.
ControlTypeDeclarationcan have generic types in them but notControlDeclaration. But p4c allows that happen as in the case ofgeneric.p4iNeed to check what is valid