writeonce/compiler/test/golden/owner/drops.wo
shoney.arickathil 2de724df11 feat(compiler): MVS ownership pass + woc driver; drop Money/SKU/Float, reject abstract
Completes plan 2 Tasks 7-8. owner.ml: mutable-value-semantics flow analysis
producing the four plan-3 emitter tables (moves, drops incl. LIVE-MASK for trap
unwinding, rc with elision, residual borrow sites) plus WO-E301-304 two-site
diagnostics. Alias questions run over canonicalized places, so a double-mut
reached through let-bound aliases lands in the residual table like the direct
form; dump.ml's contract notes the emitter must coalesce guards per operand.
main.ml: directory discovery, cross-file programs (symbols merge before bodies
check), diagnostics ordered by (file,line,col), new WO-E214 for a name declared
in two files. New docs/plan/oop-vm/01-error-catalog.md (14 emitted + 10 reserved
codes), un-ignored so both plan tracks can cite it; justfile regains woc-*.

builtin_scalars is now the five that work: Int, Bool, Text, Timestamp, Id.
Money/SKU/Float and the abstract_types allowlist are gone — `abstract` never
lexed, and Float had no literal syntax and no wob kind, so no value could exist.
Fixtures and samples retype Money->Int, SKU->Text. The abstract newtype feature
is rejected outright (verdict row adopt->reject); haxe-parity Task 7 keeps `is`.

nullable-types-implementation.md corrected: ?T is plumbed but UNENFORCED
(E211-213 declared, never emitted; probe exits 0), handed to haxe-parity Task 6
as next work item. Records all 10 dead codes incl. E205 — interface satisfaction
is unchecked. crates/rt keeps its Money/SKU fixtures (opaque strings, Stage 2).

Gate: build warning-clean, 14 + 264 checks 0 failures, pricing golden exit 0,
docs/examples histograms unchanged (13/70, zero WO-E225).
2026-08-10 21:24:50 +02:00

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Text

class Item {
n: Int
}
fn size(it: Item) -> Int {
return it.n
}
class Bag {
items: multi Item
fn tidy(take spare: Item, flag: Bool) {
let extra = Item { n: 2 }
if flag {
let inner = Item { n: 3 }
spare = inner
}
while flag {
let tick = Item { n: 4 }
}
for it in self.items {
let seen = Item { n: 5 }
}
}
}
fn pick(take a: Item, take b: Item, flag: Bool) -> Int {
let total = 0
if flag {
let tmp = Item { n: 1 }
total = total + size(tmp)
}
if total > 0 {
return total
}
total = total + size(a)
return total
}
fn store(take r: Item) -> Int {
insert into rows values (1)
return 0
}
fn eat(take it: Item) -> Int {
return 0
}
fn conditional_move(take a: Item, flag: Bool) -> Int {
if flag {
let gone = eat(a)
}
return 0
}
fn self_assign(take a: Item) -> Int {
a = a
return 0
}
fn reinit_after_move(take a: Item) -> Int {
let gone = eat(a)
a = Item { n: 7 }
return 0
}