Re: [RFC 2/2] exclude-promisor-objects: declare when option is allowed

Jeff King [off-list ref] writes:

That said, our C99 designated initializer weather-balloons haven't
gotten any complaints yet. So I think you could actually do:

  struct setup_revision_opt s_r_opt = {
	.allow_exclude_promisor_objects = 1,
  };
  ...
  setup_revisions(...);

which is pretty nice.

Yup.  The output from 

    $ git grep -n ' \.[a-z0-9_]* =' -- \*.[ch]

with a bit of "git blame" tells us that cbc0f81d ("strbuf: use
designated initializers in STRBUF_INIT", 2017-07-10) is the balloon
for this exact feature.  The same for array was done in 512f41cf
("clean.c: use designated initializer", 2017-07-14)

[I am writing it down so that I do not have to dig for it every time
and instead can ask the list archive]