Hojun-Cho
f80927201b
Drew's Hare-discipline framing: "no hardcoded size literals anywhere in the compiler." This session spent 32 commits sweeping after-the-fact and STILL kept introducing new bypass sites in our own structural work (A.5's tupleelemslot/fieldslotsize most recently). The cure is a gate that catches new violations at commit time, not a deeper sweep. tools/sizelint (sh+gawk): - Always-on: `.size = NN` / `->size = NN` / `prim(...,"name",NN,...)`. - Context-gated literals (NN(u64|i64) and `return NN`) in files or fns matching size|slot|elem|field|stride|paramfield|tinfo|primtype| slotsize|letemit|tagged. - Allow-list via `// sizelint-ok: <reason>` or `/* sizelint-ok: ... */`. - Comment strip happens after allow-list match so prose mentions of 16/24 stay quiet. Makefile: `test: all sizelint $(TESTS)` so the gate runs before any binary builds. CLAUDE.md rule 13 documents the discipline + escape hatch + optional pre-commit-hook symlink. Audit caught 3 real cstage bugs (cmd/wcc/check.c resolve_type:1002, 1079, 1531 hardcoded `tt->size = 16` / `= 32` for tagged-with-ptr and tagged-with-slice payloads — should read `8 + sub.size`). Fixed inline; behavioral no-op today (pt->size=16, st->size=24, sub.size=24 match the prior literals) but the SSoT seam carries forward through #1/#34/#65. 8 SSoT-seed allow-lists added (cstage type.c ty_str/ty_slice prim factories; wwstage primtypesize/tyslicesize; lib/ww/typ.ww tystr + slice fields + their main.combined.ww mirrors). One amalloc-overalloc allow-list at lib/ww/typ.ww:273 cites pending #36 (typed amalloc). #66 filed for extending the filter once #65 routes lib/bytes + lib/getopt's sizeof(slice) / sizeof(option) literals through SSoT — naive line-pattern extension would false-positive on 22+ ELF wire- format sites in dynout.ww. 131/131 + 994 + 995 + bootstrap green with `make sizelint` exit 0.
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- This is a project for ww programming language
- ww is a programming language aiming for Hare + CSP, no GC
- cmd/ is the C bootstrap toolchain (wcc frontend lib, w6c/w6a/w6l per-arch, ww driver); selfhost/ is the ww reimplementation
- All C code must strictly align with plan 9 coding style
- lib/ is the standard library; follow Hare APIs (signatures, layout, error idioms) — consult ref/hare/ before designing new modules. Package declaration form is Go-style explicit
package foo;and imports useimport foo;(executables declarepackage main;) per language design (rob-pike + plan-9 sensibility); lib/ API surface still mirrors Hare. - ref/hare and ref/plan9front are read-only references — consult before inventing data shapes or syntax
- No workarounds. If a bug forces a workaround, STOP and report with a precise repro. Document any retained divergence at the site with a pointer to the filed task. Never silent.
- Comments are WHY-only. Never narrate WHAT the code does — names carry the WHAT. Comment only non-obvious WHY: a constraint, a divergence from a reference, a citation to a filed task.
- Hare-fidelity over convenience. No ad-hoc extensions, renames, or convenience wrappers in lib/. Cite ref/hare// for every signature ported.
- Symmetric stages. cstage and wwstage MUST emit byte-identical asm for the same input. When inference power differs, align the richer side DOWN to the leaner side, not the other way.
- Split commits when they bundle unrelated concerns. Bisect-cleanliness is the default. Multi-fix commits need a body paragraph explaining why they couldn't split.
- Simple data, simple algorithms. Sea-of-stars style. Mirror Hare's structural choices over clever alternatives.
- No hardcoded size literals in size-computation contexts. Always route through the type table (tinfo.size / Type.size / ty_*->size / size(T) / primtypesize / tyslicesize). Per Drew's framing of Hare's discipline.
make sizelintenforces and runs as a dep ofmake test. Exemptions documented inline with// sizelint-ok: <reason>(ww) or/* sizelint-ok: <reason> */(C). Optional local enforcement:ln -s ../../tools/sizelint .git/hooks/pre-commit.