Shared initial sequences between structures

[Peter Moore]

Since this technique is quite useful for implementing, albeit crudely,
generic operators as well as Smalltalk-style inheritance, it would be
nice if this could be explicitely guarenteed in the standard.  If in
addition the offset of all members of a union are guarenteed to be the
same (and why not zero?), then the requirement of C.3.1.3 for shared
initial sequences inside unions would automatically be met.

	Peter Moore
        moore at Berkeley or ..!ucbvax!moore