- runtime: mailbox slots grow caller metadata (wo_msg), call parks on
WO_PARK_INBOX (the DB-RPC protocol) and the resume consumes a SCALAR
reply; FIBER_DONE ships the receive's return value home (same-shard
unpark or kind-6 envelope); kind-5 carries cross-shard calls
- actor death is real now: a receive trapping uncaught marks the actor
dead, error-unparks the in-flight caller AND every queued caller,
drops queued payloads + state, releases cap slots; send-to-dead
drops silently, call-to-dead traps — a call never hangs. Fixes the
pre-existing leak/dangle in TRAPF's fiber-death path (cur_msg leaked,
a->active dangled, the mailbox rotted)
- compiler: reply typing through actor-M erasure — every receive(M)
program-wide must agree on one return type and it must be a copyable
scalar (v1); WO-E226 names disagreeing classes / void receives /
non-scalar replies; call's message moves exactly like send's (owner)
- corpus: run/call-echo (park + ordered replies), run/call-dead-trap
(mid-call + to-dead, both catchable), compile-fail/call-void-receive,
compile-fail/call-reply-disagree; cross-shard call proof rides the
chat gate next
- battery 12/12 fresh-built (ASan+TSan lanes in fibers/db-actor green)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- worker DB builtins marshal to shard 0: requester-side slot encode
(VM heaps never read cross-shard), owner executes serialized in
adopt, reply unparks via new WO_PARK_INBOX park + envelope 3/4
- engine gains thread-agnostic slot entry points (insert_slots,
update_field_slot, val_encode/clone, wo_db_exec_req); traps and
messages byte-identical to the local path
- main.c: engine + replay boot BEFORE shards spawn; workers assert
rt.db/rt.wal NULL; busy shard adopts inbox once per slice
- latent stage-1 bug fixed: shared io_uring params static raced by
lazy worker init lost park wakes (~1/20 hangs); params per-vm,
short submit now fails loud
- new sample docs/examples/db-actor + just db-actor gate 8/0 (multi
x3, uring/epoll forced, single byte-exact, WAL replay pair);
ASan+TSan 6/6; full battery green
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- Float full stack: literals (fraction/exponent; `0..10` still a range), f64
opcodes 34-41, @table column, WAL bit-exact replay, json fractions in and
shortest-round-trip out. IEEE-quiet — FDIV never traps where DIV does.
- Bytes: a wo_str with its own class id, so alloc/free/copy are shared but no
Text builtin accepts one; len/at/slice/eq/concat, base64 both ways, json
boundary as base64; TEXT_COPY preserves the kind.
- No implicit Int/Float mixing (WO-E201 in the typechecker, not the emitter,
which picks the opcode from one side and would misread the other).
- One IEEE deviation: float_cmp total order (NaN last, -0.0 == +0.0) for
indexes and order-by, keys canonicalized to match. `?Float` nil is a
reserved quiet NaN — the zero word is +0.0, WO_NIL_SCALAR's bits are -2.0.
- Renderer prefers fixed over exponential in 1e-6..1e21: pure shortest makes
a price of 900.0 read `9e+02`. One renderer for interp/json/float_to_text.
- Fixed en route: lexer double-counted the leading digit; is_scalar_shaped
took Float/Bytes as Int-shaped; Bytes ownership needed a shared heap-scalar
predicate or temps never dropped; order-by bit-compared negatives backwards.
- Iteration 17: `kind = "library"` (absent = program; bad value = WO-E109),
entry-less check mode retiring the `--emit` workaround, Go's `internal/` as
WO-E108 at the consumer's `use`. Driver-only; VM/.wob/GC untouched.
- Framework reorg: internal/{parse,serve}.wo; http/form.wo split out to keep
media_type/form_values public (parse.wo had grown public surface).
- Docs: link audit (97 -> 88 broken, conflict markers resolved, 2 duplicate
stories removed), 00-code-review verified 26/27, iterations re-sequenced.
- Also carries the pre-staged pub(read)/using/#if work from the index.
- Gates: corpus 103/0, test_wal 156/0, web-app 26/0, oop-accept ALL MET.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- language: `spawn Cls { fields }` expression (ctor semantics — fields
MOVE; result is the address); `actor M` parametric field type
(contextual like multi/map — actor stays a legal identifier); `send`
is a builtin free-fn name, not a keyword (shadowing rule applies)
- typing: M inferred from Cls's receive(msg: M); WO-E221 when receive
is missing, mis-armed, or M is not a class/record/union; send checks
addr is `actor M` and the message IS an M (silent when underivable);
ctor half of spawn delegates to the Ctor arm (completeness, ?T, E207)
- ownership: send's message TRANSFERS (sender's later use = WO-E301,
corpus-pinned); spawn's fields move via the ctor machinery; an
address is Copy
- emit: spawn lowers to ctor + LOADK receive's method index + BUILTIN
68; send is BUILTIN 69 with the message excluded from fresh-arg drops
(the runtime owns it now)
- runtime: wo_actor (moved-in instance, receive idx, growable FIFO
mailbox, one delivery fiber at a time); delivery reuses the fiber
context across messages and re-queues per message (fairness — an
actor never monopolizes); the runtime drops each message after its
receive returns; actor state/queued/in-flight messages are GC roots;
teardown drops everything (main-return reap included); loader knows
the two arities
- corpus: run/actor-echo (typed spawn/send, one-at-a-time delivery
interleaved with main by budget — output exact, ASan-clean),
compile-fail/spawn-no-receive (WO-E221), send-after-move (WO-E301)
- battery green: oop-e2e 92/0, woc-test, wovm-test, log-watcher 7/0,
employee 8/0, web-app 21/0, deps-accept 8/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- wo_fiber = the interpreter state wo_vm held inline: register window,
frame stack, catch stack, caught-error slot; wo_vm keeps module,
runtime, the embedded fiber 0 (main) and the cur pointer every
interpreter access now reads through
- vm_gc_roots split into a per-fiber walker + the all-fibers caller
(one fiber today; the loop is where stage 1 T2 adds the rest)
- PURE refactor, no functional change to hide behind: full battery
byte-identical — wovm-test (test, test-iso, cli_smoke) green,
oop-e2e 89/0, woc-test green, log-watcher 7/0, employee 8/0,
web-app 21/0, deps-accept 8/0
- plan: docs/superpowers/plans/2026-08-20-shard-fiber-arc.md task 1
(plan/spec docs live on branch language-surface-strictness)
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- `order by <field> [desc]` on whole-row queries: a selection sort over
the result multi, re-reading the key per element via the range var
(DB_GET_FIELD); O(n^2), KISS, no cost planner — the result sets are
small by design
- Text order keys use a new WO_B_STR_LT builtin (content compare, reusing
the WO_B_SORT elem_cmp); scalar keys use the LT opcode. The bug this
fixes: op_lt on two Text pointers compares ADDRESSES
- `take N`: clamp to count, slice [0,N). `take` is the KwTake keyword,
not an Ident — matched as the token
- two bugs found + fixed while testing: multi-line query clauses (skip
the separating newlines) and the key-kind read (must bind the range
var BEFORE ty_of_expr of the order key, or a Text key silently uses
op_lt); Index typechecks to the container's element type (`ds[0]`)
- fixture run/db-query-order; oop-e2e 75/0, woc-test 566/0, 15 runtime
suites, log-watcher 7/0
- employee `seed`/`list`/`staff` modes now compile and run; report
(group-by+projection), raise (update), drop (delete) remain
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- DB_SCAN(64): class -> multi<Int> of every row id, materialized up
front (the 9b cursor-stability rule: the loop body point-reads, so a
row updated mid-loop cannot disturb iteration)
- DB_GET_FIELD(65): class,id,field -> the field decoded to a fresh VM
value (the out-gate copy); a table-class value IS its row id at
runtime, so this is how a compiled query reads a column, and a ref
field decodes to the target id for navigation
- DB_PROBE(66): class,index,key -> multi<Int> of ids whose first
indexed column equals key (backlink + indexed where)
- wo_val_decode_vm wrapper exposed; dispatch range 61..66, loader
arities, runner mirror updated
- 15 runtime suites green, oop-e2e 73/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- wo_row_update_field: encode new value, unique re-check against a
shadow BEFORE any mutation (violating update leaves the row
untouched, DB_ERR_UNIQUE), index entries moved old-hash -> new-hash,
old engine value freed; proven by test_table (unique refusal keeps
the row, released key becomes insertable)
- WAL UPDATE record: full-row re-log, replay = replace (remove +
re-create same id); prefix/suffix delta recorded as later
optimization; test_wal replays insert+update to the updated state
- builtins 62 DB_UPDATE_FIELD (cid,id,field,value) and 63 DB_DELETE
(cid,id), commit-before-ack like insert, WO_T_UNIQUE/WO_T_DB/WO_T_IO
mapping; dispatch range 61..63; loader arities; runner mirror
- plan Task 5 marked superseded-in-part with the recorded deviation:
the language surface (reads, queries, row views, delete statement)
is 9b's, where the comprehension design put it -- no interim brace-
select grammar to retire later
- gates: test_table 839/0, test_wal 102/0, 15 suites, oop-e2e 73/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- compiler: `insert Class { ... }` is a typed Ast.Insert in statement
AND expression position, sharing the ctor literal's field grammar;
typechecked with the ctor's omittable rule; result = the row id (Int)
- owner pass: the engine copies at the row API, so an insert BORROWS
its field values -- no transfer, no E304; node is trap-capable and
carries a live-mask drop entry like DbStub did
- emit: builtin 61 window = class-id const + one slot per DECLARED
field in declaration order; omitted defaults emitted, omitted ?scalar
gets WO_NIL_SCALAR, other omitted optionals the zero word; fresh
argument values reaped after (the push/set copy semantics)
- runtime: database/src/db.c executes via the choke-point row API;
rt.db/rt.wal opaque handles on wo_rt; WO_DATA=<dir> = replay
<dir>/shard-0.wal at boot + commit-before-ack per statement (the
builtin's return IS the ack until iteration 8 ticks); failed commit
un-applies the row and traps WO_T_IO; loader validates the class-id
slot (variable window documented in wob.h + format doc)
- the promised diff: trap/pricing-set-price-db-stub is now
run/pricing-set-price-insert printing engine-allocated ids;
durability smoke prints 1,2 then 3,4 across two WO_DATA runs
- old "bare insert is an Ident" unit test rewritten to the new
contract; runner's loader mirror accepts id 61; goldens re-blessed
- gates: oop-accept ALL CRITERIA MET, oop-e2e 71/0, woc-test 566/0,
wovm-test green, log-watcher 7/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Measured on the workload's supervisor mode, eight seconds, clean SIGTERM exit:
run 1 051 040 B in 24 allocations -> 2 112 B in 19; watch 128 B in 2 -> 64 B in
1. corpus 71/0, woc runtest 565/0, wovm unit gates green, just log-watcher 6/0.
- owner.ml: `oclass_of` called `Text` a builtin scalar, so it was Copy and NO
Text local was ever dropped — that, not the missing stdlib table, was the
leak. Text is now Owned, which forces an answer for what it does at an
ownership boundary, and the answer is uniform: it is COPIED. Into a
container (push/set/`m[i] = v`, already true), into a field (SETF), out of a
function (return), into a binding (`let s = other`), and into a loop cursor.
The source keeps its value; a freshly built Text stays the caller's and is
dropped at the site
- owner.ml: resolve_callee answers for three shapes it never knew — reserved
stdlib members, builtins, and a class's `static` members — so their results
get a type, an owner and a drop
- vm/builtin: WO_B_TEXT_COPY, the one new builtin the rule needs; SETF copies a
TEXT field in; emit copies a Text read out of a container, bound from a
place, returned from a place, or loaded into a cursor, and drops a freshly
built one after a copying store
- sysio.c: fs.read_all/net.read allocated their cap then relabelled the buffer
with the short length — but wo_str_free sizes a block by its len (no size
headers, obj.h), so a 1 MiB buffer wearing a 30-byte length went onto a
32-byte free list and never came back. They copy out at the true size now
- two regressions the corpus caught, fixed in the same pass: a @gc value read
out of a container is a plain borrow, not an rc-counted alias; and push's @gc
escape is keyed on "push is not a user-declared fn" rather than "the callee
did not resolve", which stopped being true once builtins resolved
- docs: Task 1 closed in the executable plan with its before/after numbers, and
the status board's item 1 records the deeper root cause
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The unsoundness is closed. All four MCP tools now answer correctly over HTTP
(get_running_crons, list_logs, tail_log -> ["info two","error three"],
search_log -> its match) where `tail_log` used to return
{"isError":true,"text":"tool failed: not a text value"}. corpus 71/0,
woc 565/0, wovm gates green, ASan clean on the container fixtures.
- builtin.c: multi_push, map_set (key AND value) and multi_set COPY a TEXT
element into the container. The container's declared kinds already make it
the owner of what it holds, so storing a caller-owned pointer gave one
string two owners — `push(res, e.log_path)` freed a record's field out from
under it. OWNED/GCREF elements still move (not copyable; the @gc escape
keeps their counting), so `set`'s @gc gap is untouched and still recorded
- emit.ml: `drop_fresh_text` — after push/set and the `m[k] = v` / `m[i] = v`
sugar, a value that was freshly BUILT (call result, `..` chain,
interpolation) is dropped here, while a value read out of a place is left to
its owner. That asymmetry is the point: before the copy the borrowed case
double freed and the fresh case leaked
- obj.c: the runtime's output stream is line-buffered. A long-running program
writing progress with `print` was invisible when stdout was a file or a pipe
(full buffering), and a killed one lost its log entirely; byte-exact
fixtures are unaffected
- scripts/log-watcher-accept.sh + `just log-watcher`: the acceptance test for
the sample — compile, watch (alert), run (schedule), and three MCP checks.
Hardened after it lied to me: a per-run port (a stale server on a fixed port
answered for it), a connect-probe that fails loudly when OUR server did not
come up, replies read by Content-Length rather than to EOF (the sample never
closes), and kill -9 on teardown
- docs: the copy rule is in the builtin surface; the status board records the
gap as closed and adds the new one — a blocking accept/read swallows SIGTERM,
which belongs to the shard-actor runtime's event loop, not to a patch here
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Found by driving the compiled log-watcher's third path — the MCP server. It now
answers real JSON-RPC over HTTP: initialize returns protocolVersion/serverInfo,
tools/list returns the full tool list (1049 bytes of generated JSON), and an
unauthorized request gets 401 {"error":"unauthorized"}. corpus 71/0, woc 565/0,
wovm gates green.
- lexer: `\r` and `\0` escapes. Without `\r` a program cannot write CRLF at
all — the server's `index_of(buf, "\r\n\r\n")` was searching for a literal
backslash-r, so it never found a header terminator and hung on every request
- parser: an interpolated sub-expression now mints node ids from the OUTER id
space. A fresh sub-parser started at 1, so `${...}` nodes collided with the
file's own nodes — and every side table (drops, moves, rc, masks, f_decl) is
keyed by node id. Surfaced as WO-E404 "ownership table names `headers`,
which has no register"; silent misattribution otherwise
- types.ml: `net.Conn` is a reserved SCALAR type (a file descriptor). It was
falling through as "some user class", i.e. WO_K_OWNED, so the frame would
DROP an integer at scope end
- types.ml: confident_typ knows `..` yields Text. Interpolation desugars to a
Concat chain, so without it every interpolated value looked underivable —
which is why the `+`-on-Text check missed two live sites in the workload
- `m[k]` on a map is now the OPTIONAL read (nil for a missing key), while
`get(m, k)` stays the asserting one that traps KEY. That is what makes
`let v = m[k]; if v != nil` — the workload's header lookup — work.
trap/missing-map-key now pins `get(...)`, and the surface doc records the
split
- json.encode of a `json.Value` emits it verbatim (kind 255): an echoed id was
coming back as "1" instead of 1
- disasm: TRY/ENDTRY render instead of ?OP32/?OP33
- status board: the push-of-a-borrowed-Text gap is now recorded with the
concrete failure it produces (tools/call tail_log), plus the leaked
temporary-record shell found in the same disassembly
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Found by running the compiled log-watcher, not by reading code: the supervisor
rejected every cron line ("malformed schedule: * * * * *") because a `*` field
expands to 0 and `?Int`'s nil was also 0, so `a == nil` was true for a real
value. Both log-watcher subcommands now behave: `watch` alerts on a live file,
`run` reports SCHEDULE /var/log/backup.log: * * * * *. corpus 71/0, woc 565/0,
wovm gates green.
- a nullable SCALAR (?Int/?Bool/?Timestamp/?Id) spells nil as WO_NIL_SCALAR
(-2^62), not the zero word. Heap-shaped optionals keep 0 — a null pointer is
unambiguous. The value is -2^62 and NOT INT64_MIN on purpose: the compiler's
integers are OCaml's 63-bit natives, so INT64_MIN is not expressible there
(and `min_int * 2` silently wraps to 0 — the first attempt did exactly that)
- the class table marks such fields (WOB_FIELD_NIL_SCALAR in field_class), so
the runtime writes the right absence where it produces absence itself:
json.decode leaving a key absent or seeing `null`, and parse_int on
unparseable input (so parse_int("0") is now distinguishable from a failure).
json.encode renders a nil scalar as JSON null
- emit.ml: `nil` takes its word from its destination (annotation, field,
return type); a comparison against `nil` emits the literal with the other
operand's type, so ?scalar compares against the sentinel and ?heap against 0
- vm.c: EQS accepts a nil operand — two `?Text` values compare with it, and the
answer is "both absent is equal, one absent is not". Trapping there made
`a != b` on optionals unusable (it was trapping BOUNDS "null text" in the
supervisor's rescan). A non-nil operand must still be a real Text
- docs: both normative docs now state the heap-vs-scalar nil split and the EQS
rule; the stale duplicate vm_unwind comment is gone
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
docs/examples/log-watcher (1285 lines, 7 files) now compiles clean: 0
diagnostics, a 35KB .wob written. corpus 71/0, woc runtest 565/0, every wovm
unit gate green (both dispatch flavors).
- .wob v2: each class row gains three u32 per-field arrays — the field's NAME
constant, the CLASS it refers to (or the json-raw marker), and a container
field's ELEMENT kinds. json is then a runtime service driven by metadata
instead of per-type generated code. loader/emitter/disassembler/test
assembler all read and write v2; field-name constants are interned with the
rest of the pool (interning during serialization silently loses them)
- runtime/src/json.c (new): encode by static kind + object headers + class
table (nested records need no static knowledge); decode parses and BINDS
straight into the target class — keys matched to field names, nested objects
built as the field's class, arrays as a multi of the field's element kind,
unknown keys skipped, absent keys nil. Malformed input is nil, never a trap
- `as`: `json.decode(text) as T` is the one cast this language has (WO-E403
for any other `as`, and for a bare json.decode with no target type). Its
result is `?T`, which is why the decode and the target are one instruction
- json.Value: a reserved type name for a value the source does not inspect —
the raw JSON slice, kind TEXT, re-emitted verbatim by encode
- docs: 00-wob-format.md is now the v2 reference (class metadata, TRY/ENDTRY,
the whole builtin surface, WO_T_IO); 08-builtin-surface.md documents the
text/container builtins, the OS modules with their predeclared records, and
json's two documented limits (Bool encodes 0/1, floats truncate)
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
log-watcher diagnostics 129 -> 55 (json is what is left: 13 encode sites,
3 `as` parses and their cascade). corpus 71/0, woc 565/0, wovm gates green.
- runtime/src/sysio.c (new): 17 builtins behind the reserved module names —
fs.exists/list/stat/read_all/read_at/append, time.sleep/local/iso,
env.get/stopping, net.listen/accept/read/write/close, proc.run. Thin
blocking libc calls; a failed syscall traps the new WO_T_IO with errno's
own message, which `try ... catch` is how a program handles
- record-returning members (fs.stat, time.local, proc.run) take their
result record's CLASS ID as the last argument, so the VM allocates what
it fills without knowing any source type name (the err_fill pattern)
- absence is the zero word: a missing path from fs.stat and an unset
env.get are nil, not traps
- env.stopping installs SIGTERM/SIGINT handlers on first use only
- types.ml: predeclared Stat/TimeParts/Proc records (field order is the
contract with sysio.c) + the stdlib member table (arity, builtin id,
return type, result record) + stdlib return types in confident_typ
- emit.ml: stdlib member calls lower to their builtin with the record class
id appended; WO-E406 now means "no such member", not "not linked";
predeclared records enter the class table only when a program needs them
- emit.ml: fstate carries the method's declared return type, so a tail
`return []` / `return {}` gets its element kinds; a non-empty list literal
falls back to its own element type when there is no declared destination
- types.ml: confident_typ chases a container read (`c[i]`), which is what
makes a switch over a value pulled out of a map resolve; a void `try` arm
no longer demands its catch arm agree
- corpus: lang-use-stdlib-not-linked now pins WO-E406 for an unknown MEMBER
(fs.slurp) — the "not linked" premise is gone now that fs is linked
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
log-watcher parse errors 7 -> 3 (only `as` left); corpus 71/0, woc 565/0.
- wob.h/builtin.c/loader.c: WO_B_MULTI_SET — `m[i] = v` for a multi, dropping
the element it replaces (the mirror of map_set, which the format doc's sugar
rule already had; the "no element write" gap is closed)
- ast/parser: `for k, v in m` — the second name binds the value for that key
- types.ml/owner.ml: the two cursors take the map's key and value types; both
are borrows of what the map owns, so neither is dropped per iteration
- emit.ml: map form lowers to len + key_at/val_at over slot indexes (insertion
order, cont.h's parallel arrays), same loop skeleton as the multi form
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
log-watcher diagnostics 272 -> 129 (parse errors 7, stdlib-module calls 49,
lowering gaps 72). corpus 71/0, woc runtest 565/0, wovm unit gates green.
- nil (haxe-parity Task 6's literal half): `nil` keyword, Ast.NilLit, lowered
to the zero word for every `?T` — the representation the format doc already
fixes ("a nullable field stores exactly what T stores and spells nil as 0"),
so no boxing, no unbox on read, and every drop plan already skips it.
Contextual on its destination in both type derivers, like `[]`/`{}`
- 23 new builtins (wob.h ids 16..38, loader arities, builtin.c): len, byte_at,
print_err, starts_with, ends_with, index_of, last_index_of, substr, trim,
to_lower, char_of, parse_int, split, split_ws, join, slice, pop, shift,
sort, reverse, remove, key_at, val_at
- fresh-Text/fresh-multi results allocate in the VM; `split`/`split_ws` fix
their element kind (Text), `slice` copies its source's — and COPIES Text
elements so a slice and its source never both own one value
- pop/shift hand the element's ownership to the caller; remove drops the
map's own key and value; key_at/val_at expose slot-ordered enumeration
(what `for k, v in m` will lower onto)
- parse_int is optional-shaped: unparseable is 0, `?Int`'s own nil
- obj.c/obj.h: wo_str_alloc (uninitialized Text of known length) so `join`
builds its result in one allocation instead of one per element
- types.ml/emit.ml: builtin signatures, argument-shape requirements and
return types for all 23 — the return table is also what classifies a `let`
holding a fresh Text or multi as owned, so an omission there is a leak
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
VM catch frames + expression-form try/catch in the compiler. Uncaught traps
keep byte-for-byte today's surface. log-watcher parse errors 18 -> 7;
corpus 71/0, woc runtest 565/0, wovm unit gates green (both dispatch flavors).
- wob.h: WOP_TRY (A sBx: push catch frame, handler at pc+sBx) / WOP_ENDTRY;
WO_B_ERR_FILL builtin (fills the catch record: 0 code, 1 line, 2 method,
3 msg — the field-order contract with the compiler)
- vm.h/vm.c: catch stack (depth, handler pc, error reg) + the caught error;
vm_unwind takes a stop depth, so a caught trap kills every frame above the
catching one exactly as an uncaught trap would, then releases only what the
try region owned in the catching frame (drop-entry diff against the handler
pc) and resumes at the handler; RET/RET0 drop the catch frames of the frame
they leave; TRAPF resumes instead of returning when the trap was caught
- builtin.c: err_fill allocates the method/msg Texts into the record the
compiler owns, so the pending error never has to outlive the landing
- loader.c: TRY's handler target validated like a jump, error register like
any register operand; err_fill arity
- lexer/token/ast/parser: `try`/`catch` keywords; `try expr catch (e) expr`
and `catch (e) { block }`, newline allowed before `catch`; try binds looser
than every operator, so `try a / b catch (e) 0` catches the division
- types.ml: predeclared `Error` record (merged table only), catch binding,
arm-type agreement reported only when both arms are confidently typed
- owner.ml: analyze_try — the catch arm is an alternate flow join off the
entry state, the error record is an owned handler-scope local
- emit.ml: TRY/body/ENDTRY/JMP + handler prologue (NEW Error, err_fill),
join drops on both arms, `Error` class entry only for programs that catch
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- Modules: `use`/`pub`, directory-as-module, per-module symbol resolution (a
flat first-wins merge silently ran the wrong `pub fn` body), six reserved
stdlib namespaces typed UNKNOWN-BUT-RESERVED.
- Surface: `and`/`or` (own precedence tier, short-circuit, Bool-only), `${}`
interpolation desugared at parse time, `const`, break/continue with
drop-correct exits, do-while, inline-fn rejection.
- switch expr/stmt: required `default` over scalars/Text, arm unification,
EQ/EQS+JZ lowering, per-arm drop scopes with N-way JOIN-DROP; `default`
sorted last by a shared lowering order (textual order made arms dead).
- typedef records: structural, same shape = one class entry; `?name: T`
nullable-by-shape; emit_ctor fills omitted defaults; `type` as field name.
- Enum variants: all-bare unions = int ordinals; any-payload = one class
entry per variant, tag IS the header class_id (no header field, no format
bump); exhaustive switch without `default`; arity checked both directions.
- Payload escape modeled as move-out (pointer-kind fields only — a scalar
escape is a copy); caller reaps owned heap temps passed by borrow: two
unbounded LSan-blind leaks, 10.5 MB -> 1.5 MB flat over 300k iterations.
- Fixed en route, each with a RED repro: dead E209 builtin-arg check and
`int_to_text` missing from both types.ml builtin tables (both segfaulted
wovm), multi-file phantom double-report, emit_ctor's field temp clobbering
dst in tail position (pre-existing), warnings swallowed without an error.
- Two fenced VM builtins: `int_to_text` (13), `variant_tag` (14).
- 14+565 unit (was 14+401), corpus 71 (was 32) plain and under wovm_asan,
wovm-test + cli_smoke green. Log-watcher 307 -> 93 diagnostics (85 E101 /
4 E207 / 1 E208 / 3 W202); the 5 non-E101 residuals await Task 7 grammar.
- 16 tasks complete: arena, object model, borrow word, containers,
RC + budgeted cycle collector, wob_build, validating loader,
interpreter core (dual dispatch), object opcodes, drop-map unwinding,
builtins + DB_STUB + TRAP, ICALL, wovm CLI + just recipes
- 13 test suites × 2 dispatch flavors (ASan+UBSan) + CLI smoke, all green
- .wob v1 format pinned in src/wob.h + docs/plan/oop-vm/00-wob-format.md
- wo-rt.c reference event-loop preserved for sub-project 2
This is Iteration 2 of the OOP milestone; compiler front (Iteration 3)
is in progress on this branch. They meet at Iteration 4 (emitter+e2e).
