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The documentation for the DO_FOR_EACH_* flags is sprinkled over the
refs-internal.h file. We define the two flags in one spot, and then
describe them in more detail far away from there, in the definitions of
refs_ref_iterator_begin() and ref_iterator_advance_fn().
Let's try to organize this a bit better:
- convert the #defines to an enum. This makes it clear that they are
related, and that the enum shows the complete set of flags.
- combine all descriptions for each flag in a single spot, next to the
flag's definition
- use the enum rather than a bare int for functions which take the
flags. This helps readers realize which flags can be used.
- clarify the mention of flags for ref_iterator_advance_fn(). It does
not take flags itself, but is meant to depend on ones set up
earlier.
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>