Andres Freund <and...@anarazel.de> writes: > On 2018-09-20 18:38:36 -0400, Tom Lane wrote: >> hmmm ... but even with variadic, C's macro facility is so weak that >> I'm not sure we can reimplement these with it. What would the >> expansion look like?
> There's a dirty hack to count arguments in vararg macros: > https://groups.google.com/d/msg/comp.std.c/d-6Mj5Lko_s/5fW1bP6T3RIJ Doesn't seem to help for this case. What we really want is to expand a given pattern once for each variadic argument, and I don't see how to get there from here. Although maybe I'm thinking too much inside-the-box. The expansion doesn't necessarily have to be identical to the code the macros generate today. In fact, that code is kinda bulky. I wonder if we could go over to something involving a variadic function, or maybe an array of string-pointer constants? regards, tom lane
