Core:
- Uncaught THROW prints its standard message ("Stack underflow
(throw -4)"; unknown codes as "Catch = <n>") instead of the
"forth-throw" sentinel. ABORT" text is carried as a structured
payload and shown only when the -2 throw goes uncaught -- CATCH
stays silent and the payload cannot go stale. ABORT throws -1
through the same path.
- WORDS: optional same-line substring filter (WORDS FDEPTH), skips
internal words (new INTERNAL header flag, set at create for
underscore-prefixed names), wraps at 78 columns, prints a count.
ORDER names wids (FORTH / wid#N) instead of Rust debug output.
- .S honors BASE. New: F.S (float stack), DUMP (hex+ASCII,
bounds-checked, 4K cap), ? (fetch-and-print, boot.fth). BYE is a
real word now: sets a VM flag the driver honors (exits REPL,
stops rest of line/file).
CLI:
- Persistent history (~/.local/state/wafer/history, 0600 perms,
$WAFER_HISTORY override), Tab completion over the live dictionary
(snapshot refreshed after each line), Up/Down do prefix history
search, Ctrl-C clears the line instead of exiting.
Web:
- History survives reloads (localStorage, cap 200, dedup, init-code
runs excluded), User Words palette populated via new words()
export, stack bar annotates non-decimal BASE, base() reads the
real BASE sysvar instead of returning a hardcoded 10.
Implement PAGE (Facility word set) as IR primitive emitting form feed.
Web REPL clears output div on form feed, CLI REPL sends ANSI clear.
Fix init code panel: use default textarea content instead of placeholder
so init code actually executes on first visit. Update wasm-pack 0.10→0.14
and refresh Cargo.lock to latest compatible versions.
Decouple ForthVM from wasmtime via a Runtime trait so the same outer
interpreter, compiler, and 200+ word definitions work on both native
(wasmtime) and browser (js-sys WebAssembly API) backends.
Runtime trait (runtime.rs):
- HostAccess trait for memory/global ops inside host function closures
- HostFn type: Box<dyn Fn(&mut dyn HostAccess) -> Result<()>>
- Runtime trait: memory, globals, table, instantiate, call, register
NativeRuntime (runtime_native.rs):
- Wraps wasmtime Engine/Store/Memory/Table/Global/Func
- CallerHostAccess bridges HostAccess to wasmtime Caller API
- Feature-gated behind "native" (default)
outer.rs refactor:
- ForthVM<R: Runtime> — generic over execution backend
- All 87 host functions converted from Func::new closures to HostFn
- All memory access via rt.mem_read/write_*, global access via rt.get/set_*
- Zero logic changes — pure API conversion
wafer-core feature gates:
- default = ["native"] includes wasmtime + all native modules
- Without "native": pure Rust only (outer, codegen, optimizer, dictionary)
Browser REPL (crates/web):
- WebRuntime: js-sys WebAssembly.Memory/Table/Global/Module/Instance
- WaferRepl: wasm-bindgen entry point (evaluate, data_stack, reset)
- WebAssembly.Function with Safari fallback (wrapper module)
- Frontend: dark terminal UI, word panel, init code editor, history
- Build: wasm-pack build --target web
All 452 tests pass (431 unit + 1 benchmark + 9 comparison + 11 compliance).
Oleksandr Kozachuk
ok2