-- Tree-bridge invariants: the ops that still route through the
-- (internal) tree-walker after --run-tree was removed in 0.12.1.
--
-- The VM bails to the tree-walker transparently for these shapes
-- (regex, fmt variadic, fmt2, rd/rdb/rdjl, sleep, ct, rsrt, and the
-- 3-arg ctx variants of map/flt/fld/srt). The JIT and AOT inherit the
-- same dispatch via the VM's `is_tree_bridge_eligible` table.
--
-- This example exercises one op per family so the engine harness
-- catches any regression that breaks bridge dispatch under VM/JIT/AOT.
-- rgxall1: 0-or-1 capture group, flat L t over every match.
keys>L t;rgxall1 "(\w+)=\d+" "x=1 y=22 z=333"
-- fmt2: decimal-precision formatter; binary signature x digits.
pi-two>t;fmt2 3.14159 2
-- ct 3-arg ctx: closure-bind count by predicate.
gt x:n threshold:n>b;>x threshold
positive-over-two>n;ct gt 2 [1,2,3,4,5]
-- map 3-arg ctx: closure-bind map.
add x:n c:n>n;+x c
shifted>L n;map add 10 [1,2,3]
-- rsrt 2-arg: descending sort by key.
identity x:n>n;x
desc>L n;rsrt identity [3,1,4,1,5]
-- run: keys
-- out: [x, y, z]
-- run: pi-two
-- out: 3.14
-- run: positive-over-two
-- out: 3
-- run: shifted
-- out: [11, 12, 13]
-- run: desc
-- out: [5, 4, 3, 1, 1]