compile: '(' (ha:317-323) appends inst_groupstart(capture_idx) and
grows jump_idxs per level; ')' (ha:324-334) appends the void
inst_groupend, fixes up the level's pending alternation jumps (#70
range + #58 assert), range-deletes them (#8) and closes the level;
the loop-exit done arm gains the Unmatched-'(' check (ha:277-282).
The anchors' group_level arms, the postfix inst_groupend/groupstart
arms and find_last_groupstart's success path go live unchanged.
run_thread: inst_groupstart (ha:636-652) fill-grows captures to
idx+1 (count-loop spelling of Hare's 3-arg fill-append) and opens
the group with the SIZE_MAX end sentinel via the #20-fixed indexed
struct store; inst_groupend (ha:653-668) closes the innermost
unclosed capture (ha:655's 2-clause for respelled — ww has no
cond;post form) and slices content from the bytesize span through
the addr-of-element pointer.
search: the ha:820 loud bound flips to the real capture spread
(#35/#25); the pad fill self-activates for unset trailing groups.
Tests: ( ) graduate from the metachar-loud table into real-text
error rows (+ ww-added anchor-in-group / Unused-on-groupstart
re-verify rows); hand-built groupstart/groupend arm cases; the 5a
find table (+test.ha:257-275 group/alternation, :499-503/:607 jump
bugs, :610-621 submatch family, :635/:640 alternation-group,
:649-665 nested minus the 5b {m,n} twins, + ww-added multibyte
row) with len(res) pinned per row; submatch content rows
(+test.ha:704-708 + ww-added multibyte) — the 5a acceptance gate.
Hojun-Cho
a2c2bbc6b1