"Merlin Moncure" <[EMAIL PROTECTED]> writes: > Switch, plus struct (basically a union) will do the trick nicely. Can > it be a formal union, or is it better as a void*?
I don't think a union buys much notational convenience or safety here, although admittedly it's a close question. In one case you're trusting to cast the pointer to the appropriate type, in the other you're trusting to use the right union member. One advantage of separate structs is that there's no reason not to make the struct type names long enough to be clear, whereas there's a very strong notational temptation to make union member names short, because you'll be typing them a lot. regards, tom lane -- Sent via pgsql-patches mailing list (pgsql-patches@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-patches