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.
The 0100 identity fix registers a namespaced import's own functions under a
module-qualified name (ns.fn) in fn_ast_map WITHOUT an eager declareFunction,
so the alias is lowered through lazyLowerFunction's null-FuncId lowerFunction
path. That path had no Function.source_file to restore (the non-null path does
setCurrentSourceFile(func.source_file)), so the alias lowered in the CALLER's
visibility context. A qualified function that called a helper from its OWN
module's flat import was then rejected "not visible".
Fix:
- ProgramIndex.qualified_fn_source maps each ns.fn alias to its declaring
source file, populated in registerQualifiedFn (current_source_file is
pinned to the decl's source by registerNamespaceQualifiedFns).
- lazyLowerFunction's null-FuncId branch restores that source before
lowerFunction, so ns.fn's body lowers in its own module's context and its
intra-module / own-import callees resolve.
- lowerFunction records Function.source_file = current_source_file on the
freshly-begun function (matching declareFunction), so the lowered alias
carries its own module for diagnostics/emit.
Regression: examples/0720-modules-qualified-own-import.sx — calc.compute (a
qualified alias) calls triple/base from calc.sx's own flat import; reports
"'triple' is not visible" on the attempt-1 code, passes after. 0719's
cross-module dual-parse assertion stays green. issues/0100 RESOLVED banner
extended with the F1 follow-up.
