WASM tail-call instruction wired into every tail position:
if branches, eval_begin last expression, all special-form dispatchers
(cond/when/unless/case/let/let*/letrec/begin/and/or), function
application's $apply, and apply's closure-body $eval_begin.
wat2wasm + wasm-validate now use --enable-tail-call.
Reader fixes:
- Dotted pair syntax: (a b . rest) parses as a real dotted list.
Without this, variadic params and other dotted-cdr forms parsed
as 4-element proper lists.
- Stray ) at top level advances source_ptr instead of spinning
forever. Found via bisection of functional.lsp under TCO.
- eval_args guards against non-pair tails so a misplaced dotted
argument (e.g. an unexpanded macro template) can't deref garbage.
Cross-tier numbers (wasm-test-functional-cross):
before: 93/111 reached, stack overflow on (ack 3 4)
now: progresses through the full TCO section, deep let, named-let
to 100k, mutual recursion to 200k. Still climbing.
Bend gpu demo:
6th playground option ("bend (gpu dispatch) ⚡") ships a SHAKE256
fan-out at 1M inputs via (bend!-call ...). Run button is GUARDED:
if no bend URL is configured, refuses with
"set a bend URL first — this demo is GPU-only by design".
Protects customer machines from burning minutes on a workload the
local tiers cannot finish in reasonable time.
- bend URL and vault password now share a single config-bar row, split
via a 2-column grid (1fr 1fr). Vault still hidden when free-form
isn't selected; just collapses its column.
- Every flexbox removed. Every multi-child container uses CSS grid:
.controls, .config-bar, .bend-bar, .vault-bar, .panes, .pane,
.brand, .tabbar, .tabs, .tab, .transcript, .entry, .tier-output,
.prompt-bar, .lock-screen, .lock-card, .lock-row.
- Added `[hidden] { display: none !important; }` so the ephemeral
button on the REPL lock screen actually hides the modal. Without
this, .lock-screen's `display: grid` overrode the hidden attribute's
UA-default display: none.
Interactive REPL at lumbda.com/repl with:
- multi-tab sessions (click + to add, × to close, double-click to rename)
- per-tab tier selector (python/c/asm/all-three race)
- persistent transcripts encrypted in localStorage via Web Crypto
(PBKDF2 + AES-GCM, vault id = SHA-256(password || device-salt) —
same pattern as unsandbox's vault-encryption-design.md, native
crypto.subtle API instead of CryptoJS)
- ephemeral mode (skip vault, transcripts vanish on reload)
- one worker per (tab × tier) — state persists across evals in a tab
- reboot tier button (terminate this tab's worker, fresh state next eval)
- cancel button (kills the running worker in active tab)
Home page now links to both /playground/ and /repl/.
Tier state itself does NOT persist across reloads — the transcript does,
but defines/set!/hash-tables vanish with the worker. Portal save/resume
in WAT (deferred) will let a tier session survive close+reopen.
