-- rgxall pattern text: every match as a list of capture groups.
-- Shape is always L (L t): no-group patterns wrap the whole match in
-- a single-element inner list, so the outer shape stays predictable.
-- `rgx` returns only the first match when the pattern has a capture group,
-- so `rgxall` is the right tool for HTML scraping and bulk extraction.
-- No-group case: each match wrapped in a single-element list.
all-digits>L (L t);rgxall "\d+" "a1 b22 c333"
-- One capture group: pull the inner text of every <h2>.
-- This is the case where `rgx` fails (first match only).
inner-h2>L (L t);rgxall "<h2>([^<]+)</h2>" "<h2>One</h2> <h2>Two</h2> <h2>Three</h2>"
-- Two capture groups: each inner list has length 2.
kv-pairs>L (L t);rgxall "(\w+)=(\d+)" "x=1 y=22 z=333"
-- No matches: empty outer list.
no-match>L (L t);rgxall "\d+" "no digits here"
-- run: all-digits
-- out: [[1], [22], [333]]
-- run: inner-h2
-- out: [[One], [Two], [Three]]
-- run: kv-pairs
-- out: [[x, 1], [y, 22], [z, 333]]
-- run: no-match
-- out: []