Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.
Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).
Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.
zig build test: 426/426; examples suite: 595/595.
Route EVERY write of type_alias_map / module_const_map / global_names (and
their *_by_source analogues) through one helper per map
(putTypeAlias/putModuleConst/putGlobal/dropModuleConst). The global put and the
by-source put are now inseparable, so no write-site can mirror one side and
miss the other — the dual-write drift that leaked ns-only aliases past the
source-aware bare-TYPE gate. Grep-clean: no raw .put/.remove to the three maps
outside the helpers (mirrors the no-raw-TypeTable.update discipline).
The generic-struct instantiation alias sites (Secret :: Box(s32), both the
.call and .parameterized_type_expr branches) previously registered only a named
struct in the TypeTable and never reached type_aliases_by_source, so
moduleTypeAuthor missed them and a bare ns-only use leaked (exit 42, no
diagnostic). Routing those writes through the unified putTypeAlias lands the
alias in the per-source cache and the leak closes BY CONSTRUCTION — a flat use
still resolves to the same TypeId findByName would, a ns-only use is rejected.
Regression 0749 (ns-only Secret :: Box(s32) bare -> "type 'Secret' is not
visible"): fail-before on daf4bbc exit 42 no diagnostic, pass-after exit 1.
Single-author resolution byte-identical (486 passed / 0 failed). resolver.zig
single graph-walk untouched; generic/param-protocol/Vector/type-fn stay legacy.
