New :lists feature in @(collect)/@(coll).

This is for those situations when multiple lists are being
collected, and must all be bound even if empty. Yet, the
lists are independent rather than parallel, so the discipline
of :vars is too rigid.

* match.c (lists_k): New keyword symbol variable.
(h_coll, v_collect): Extract :lists argument as local variable
lists, validate that :lists is not used on @(repeat)/@(rep)
and implement logic.
(match_expand_keyword_args): Treat expansion of :lists
the same way as :vars.
(syms_init): Initialize lists_k.

* match.c (lists_k): Declared.

* txr.1: Documented.

0 files changed, 0 insertions, 0 deletions