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.
attempt-3 closed the MAIN-file value-param-as-type quadrant (0172) in the
UnknownTypeChecker, but the checker only walks main-file decls — an IMPORTED
generic struct's field with a bad type name was never checked. Worse, the
generic-struct INSTANTIATION resolved its field type nodes in the (possibly
cross-module) instantiation site's source context, not the template's module.
So for `Bad :: struct($N: u32) { x: N; }` declared in an imported module and
used as `Bad(3)` from main, the field `x: N` resolved against the main file:
the value-param-as-type leaf poisoned it with `.unresolved` and PANICKED at
LLVM emission, and the genuinely-undeclared sibling (`y: Missing` in a generic
import, distinct from the non-generic 0759 case) silently fabricated a 0-field
stub.
Root cause + uniform fix: capture the declaring module on each StructTemplate
and resolve its field type nodes in THAT source context during
instantiateGenericStruct. The source-aware nominal leaf then classifies main vs
imported by the TEMPLATE's file, so both failure modes are diagnosed at the
right authority for every quadrant — main + imported, undeclared name + value
param used as a type:
- imported `.undeclared` field → the existing leaf emits "unknown type 'X'"
(now reached because `from` is the template's module, not main).
- imported value-param-as-type → the `is_generic` leaf, when the name is bound
as a comptime VALUE (`comptime_value_bindings`), emits the tailored
"'N' is a value parameter, not a type" hint (gated to non-main; the
UnknownTypeChecker owns the main-file case). Caught in every type position
(`x: N`, `*N`, `[3]N`, `?N`). A genuinely-unbound type param (`$R`) stays a
silent `.unresolved`.
No `.unresolved` reaches LLVM for these cases (hasErrors halts after lowering);
the emit_llvm `.unresolved` @panic tripwire stays as the last-resort sentinel.
Valid value-param VALUE positions (`[N]u8` dim, `Vector(N,T)` lane) and
`$T:Type`/`$T:Protocol` type-param fields still resolve.
Regressions:
- 0760-modules-imported-generic-value-param-as-field-type (panic-before / clean
diagnostic-after).
- 0761-modules-imported-generic-undeclared-field (silent-compile-before / clean
diagnostic-after).
0171/0172/0759 stay green; main-file quadrants emit exactly one error.
Gate: zig build; zig build test (423/423 + LSP corpus sweep); run_examples 501
passed / 0 failed (prior 499 byte-identical); m3te ios-sim build exit 0.
