(After Konrad Zuse) A descendant of Ada, Modula-2, Mesa and Oberon-1, described by Christian Collberg in his PhD thesis 1991. Zuse supports several levels of information hiding. The Zuse type system includes fully hidden types (similar to Modula-2opaque types but without any implementation restriction), semi-open pointer types (same as Modula-2opaque types), extensible record types (similar to Oberon-1 public projection types but without the compiler hint), enumeration types, extensible enumeration types, and extensible {subrange types}. A type can also be protected by specifying the operations that particular modules may perform (similar to C++ {friend classes} and {Ada} {private types}). Zuse also includes hidden and extensible constants and hidden inline procedures. In order to support the higher levels of information hiding the implementation employs partial intermediate code linking. A version for Sun-3 is available. (1999-02-18)
