-- Generic tree-bridge: tree-only builtins now work on every engine.
--
-- Pre-fix, `rgx`, `rgxall`, `fmt` variadic, 2-arg `rd`, and `rdb` errored
-- under `--run-vm` and `--jit` with
-- `Compile error: undefined function: <name>`. The fix routes them through
-- `OP_CALL_BUILTIN_TREE`, a single opcode that hands the call to the same
-- interpreter dispatcher `--run-tree` uses. Tree, VM, and Cranelift now
-- produce identical output, which is what the engine harness asserts when
-- it replays this example across all three.
-- rgx: every match of a no-group pattern.
digits>L t;rgx "\d+" "a1 b22 c333"
-- rgxall: every match with capture groups, uniform L (L t) shape.
pairs>L (L t);rgxall "(\w+)=(\d+)" "x=1 y=22 z=333"
-- fmt: variadic; bridge handles arbitrary argc by spilling regs to a
-- contiguous slot before the call.
sentence>t;fmt "{} hits across {} files" 3 1
-- rdb: in-memory CSV parse. Result-returning, so the function returns
-- R (L (L t)) t and the engine asserts on the wrapped form.
parsed>R (L (L t)) t;rdb "a,1
b,2" "csv"
-- run: digits
-- out: [1, 22, 333]
-- run: pairs
-- out: [[x, 1], [y, 22], [z, 333]]
-- run: sentence
-- out: 3 hits across 1 files
-- run: parsed
-- out: [[a, 1], [b, 2]]