try foo() catch (e) { } // legal
try foo() catch e { } // parse error with a migration hint
Same capture style as the for-loop. All four catch shapes keep working
with the parenthesized binding — block, bare-expression body, and the
== match sugar — and the no-binding forms are unchanged. onfail follows
the same rule (onfail (e) { }); its expression-cleanup form is
disambiguated by the paren-group-before-brace lookahead, so
onfail (f()); stays an expression cleanup.
AST unchanged; the printer renders the parens; the #run escape help
text updated. Corpus migrated (57 catch + 3 onfail bindings, in-source
parser test strings, specs incl. grammar rules, readme untouched —
no catch examples there).
Regression: examples/1157-diagnostics-catch-binding-needs-parens.sx;
re-captured stderr for 1010/1013/1037/1123 (migrated source echoed in
carets + help text).
xs[1..=3] (end inclusive), xs[0<..<4] (both exclusive), xs[..=2]
(prefix form with markers, implicit 0 start), xs[2<..] (open end,
exclusive start), and xs[..] (whole collection) — lowered as lo+1 /
hi+1 on the existing subslice op. Strings slice through the same path.
An explicit end marker requires an end expression, matching the
for-header rule.
Regression: examples/0052-basic-slice-range-bounds.sx.
Each side of '..' takes an optional bound marker, defaulting to
start-inclusive, end-exclusive (a..b == a=..<b; a..=b stays the short
end-inclusive spelling):
for 0<..<N (i) { } // 1 .. N-1 (both exclusive)
for 0=..=N (i) { } // 0 .. N (both inclusive)
for 0<..=N (i) { } // 1 .. N
for 0..<N (i) { } // 0 .. N-1 (explicit default)
for xs, 2<.. (x, i) // open range, exclusive start: i = 3, 4, ...
The nine lexemes are single tokens (maximal munch on '<'/'='/'..'), so
expression parsing never sees the leading marker as a comparison; '<',
'<<', '<=', '==', '=>' lex unchanged. An explicit end marker makes the
end expression mandatory; open forms are a.. / a<.. / a=... Works in
runtime, multi-iterable, and inline-for headers.
Regression: examples/0051-basic-for-range-bounds.sx (full matrix, open
start-marked ranges, comptime unroll, runtime bounds, lexer
non-regression); 1152's pinned message generalized.
The for header is now a comma-separated list of iterables with a
positional capture group and no ':' separator:
for xs (x) { } // collection
for 0..n (i) { } // range (end exclusive)
for 1..=5 (a) { } // ..= inclusive end
for xs, 0.. (x, i) { } // index idiom (replaces (x, i))
for xs, ys (x, y) { } // parallel (zip) iteration
for xs (x) => sum += x; // arrow body (full statement)
First-iterable-wins: the first iterable's length drives the loop and
must be bounded; the other positions follow by their own cursors (a
non-first range's end is not consulted or evaluated; a shorter
non-first collection is read past its length on mismatch). The old
single-iterable index capture is replaced by the trailing open range.
Capture/call disambiguation is positional: the paren group immediately
before '{' or '=>' is the capture, every earlier top-level group is a
call. 'for zip(a, b) (x, y)' calls zip; 'for f(n) { }' reads (n) as
the capture and errors with a parenthesize/add-capture hint. The old
':' form errors with a migration hint.
Lowering is unified across forms: one cursor slot per position (ranges
start at their start, collections at 0), all advanced together, the
first position's bound terminating. inline for keeps the single
bounded comptime range.
Migrated the full corpus (examples, library modules, issue repros,
in-source test strings). New coverage: examples/0050 (the full feature
surface) and examples/1149-1155 (seven diagnostic faces). specs.md For
Loop section + grammar rewritten; readme teaser updated.
Sweep all src/**.zig comments that cite resolved issues (issue NNNN /
fix-NNNN / KB-N): the invariant or mechanism each comment states is
kept; the historical citation is dropped, per the no-conclusion-comments
rule. Pure-history parentheticals are removed outright. References to
the 16 still-open issues (0030, 0041-0056) are untouched, as are test
NAMES carrying regression provenance (matching the sanctioned
"Regression (issue NNNN)" example-header convention).
Also removes the issues/0019-import-non-transitive-c-scope/ fixture dir
— the issue is superseded and its behavior is covered by
examples/0706-modules-import-non-transitive.sx (the .md writeup stays).
issues/0030's repro .sx stays: that issue is an open feature request.
Gate: zig build OK; zig build test 426/426; run_examples 541/0; zero
expected/ snapshot churn.
Closes the remaining three F0.6 findings so the universal backtick raw
identifier holds in BOTH classifiers and at EVERY parser construction site.
1. Struct-body constants thread is_raw + name_span. The struct-body const
forms (untyped `` `s2 :: 5 `` and typed `` `s2 : T : v ``) built the
const_decl node without name_span/is_raw, so a backtick const was falsely
rejected and a bare reserved-name const caretted at 1:1. They now capture
both. Structural cure: `ast.ConstDecl`'s name_span + is_raw carry NO
default, so the compiler rejects any construction site that omits them
(mirrors checkBindingName's required `is_raw` arg). FnDecl keeps its
defaults — every parser fn_decl routes through parseFnDecl whose
`name_is_raw` is a required parameter (equivalent guarantee).
2. Raw identifier in TYPE position flows through the normal continuations.
parseTypeExpr no longer returns a terminal type_expr for a raw atom; the
raw flag rides the atom through the qualified-path / Closure / parameterized
continuations, so `` `s2(s64) ``, `` *`s2 ``, `` ?`s2 `` all parse.
ParameterizedTypeExpr carries is_raw; resolveParameterizedWithBindings
skips the `Vector` intrinsic when raw.
3. sema/LSP (the second classifier) honors is_raw. Type.fromTypeExpr returns
null for a raw type_expr; resolveTypeNode skips the builtin classifier when
raw; resolveTypeNameStr takes a skip_builtin arg threaded from te/id.is_raw
(compound inner names pass false). A backtick reserved-name annotation now
resolves to the user type in the editor index, not the builtin.
Tests: examples/0156 (struct-body const), 0157 (parameterized raw type +
wrappers), 1142 (bare struct-body const errors, caret on name); src/sema.test.zig
pins the LSP raw-type resolution (fail-before verified). Gate: 365 unit tests,
429 examples, 0 failed.
AGRA ruling (attempt 4): `` `name `` is THE LITERAL identifier `name`, usable in
EVERY position — the backtick only means "treat this token as a plain identifier,
never the reserved keyword/type", and is never part of the name's text.
- Raw in TYPE position is now VALID (reverses attempt-2 "raw is not a type"):
`parseTypeExpr` emits a raw `type_expr`; `TypeResolver.resolveNamed` gains a
`skip_builtin` flag (threaded from `te.is_raw` via lower.zig + type_bridge) so a
`` `s2 `` reference resolves to a `` `s2 ``-declared type (struct/enum/union/alias),
else a normal "unknown type 's2'" error (reportIfUnknownType skips the builtin
exemption when raw). Bare `s2` in type position stays the builtin int.
- Every declaration-name site is is_raw-exemptible: `is_raw` added to TypeExpr +
StructDecl/EnumDecl/UnionDecl/ErrorSetDecl/ProtocolDecl/ForeignClassDecl/UfcsAlias/
NamespaceDecl/ImportDecl/CImportDecl/LibraryDecl; parser threads name_is_raw to
every decl parse fn; namespace imports carry it through imports.addNamespace.
Typed-const path (`` `s2 : s64 : 5 ``) now threads name_span+is_raw (fixes the
1:1-caret bug).
- Check<->exemption made structurally symmetric: checkBindingName/checkDeclName take
is_raw as a REQUIRED argument and skip inside the check, so no call site can
validate a name without honoring the exemption (the desync cause of prior rounds).
- Bare reserved-name declarations of every kind still error (0076 preserved);
`#import c` foreign names stay auto-raw + bare-callable.
specs.md + readme.md updated to the universal model. issue 0089 RESOLVED banner
rewritten. Examples: replace 1139 (raw-not-a-type) with 0154 (raw type reference);
add 0155 (typed const + union tag) and 1141 (bare type-decl negatives).
Gate: zig build + zig build test + run_examples (426 passed, 0 failed).
A bare reserved-type-name `::` declaration was silently accepted, and the
attempt-2 lowerCall rewrite then made a bare `s2 :: (…) {…}` function callable —
bypassing the backtick rule for handwritten sx. The reserved-name binding check
covered `:=` / typed-local / param / captures but NOT the `::` declaration form.
- ast: `ConstDecl`/`FnDecl` carry `is_raw` + `name_span` threaded from the parser
(parseConstBinding / parseFnDecl, all call sites incl. struct/impl methods).
- semantic_diagnostics: reject a bare reserved spelling at EVERY declaration-name
site — const, function (incl. struct/impl methods), struct/enum/union/error-set,
protocol, foreign-class, ufcs alias, namespaced/library/c-import name. Backtick
(`is_raw`) and the compiler's `#builtin` definition (`string :: []u8 #builtin`)
are the only exemptions; a value whose node is itself a named decl defers to
that node's own check.
- c_import: synthesized foreign fn_decls are `is_raw = true`, so a C function
whose own name collides with a reserved spelling (`int s2(int);`) imports and
bare-calls unedited.
- lower: scope the `.type_expr`→`.identifier` call rewrite to a callee FnDecl of
RAW provenance (`is_raw`) — only a backtick / `#import c` foreign fn can carry a
reserved-name spelling, so a non-raw match never gets rewritten.
- examples: 0153 (positive — backtick `::` const + fn, bare + tick call), 1140
(negative — bare `::` const + fn rejected).
- docs: specs.md + readme.md state the backtick is required at every binding site
including `::` const / function / type declarations; issue 0089 banner updated.
Completes the issue-0089 backtick raw-identifier / `#import c` exemption
across all remaining identifier positions and closes three boundary gaps
the F0.6 review found.
1. Exhaustive raw-binding coverage. The `is_raw` bit now threads through
`ast.Identifier` and EVERY binding/capture form — `IfExpr`/`WhileExpr`
optional bindings, `ForExpr` capture + index, `MatchArm` capture,
`CatchExpr`/`OnFailStmt` tag bindings, `DestructureDecl` per-name, and
the protocol-default-body / foreign-class method param lists — not just
`var_decl`/`param`. `UnknownTypeChecker` skips the reserved-name check at
each arm when raw, so a backtick works in every identifier position while
a bare reserved spelling still errors (issue 0076 preserved).
2. Raw identifier is never a type. `parseTypeExpr`'s atom rejects a raw
identifier in type position (`x : `s2 = 1`, `List(`s2)`) with an accurate
diagnostic instead of silently type-classifying it.
3. Reserved-name function bare-callable. A bare `s2(4)` parses its callee as
a `.type_expr` (reserved spelling); `lowerCall` now rewrites a type_expr
callee to an identifier when a function of that name is in scope, so a
backtick-declared sx fn and a `#import c` foreign fn whose C name collides
with a reserved type spelling both resolve by their bare name.
(`TypeName(val)` is not a cast, so there is no ambiguity.)
Tests: examples/0152 (every control-flow/capture form + bare ref/call/member
access), examples/1054 (catch/onfail tag bindings), examples/1139 (raw in
type position rejected), examples/1220 extended (foreign reserved-name
function bare-call). 0076 negatives 1119/1121/1122/1123/1124/1125 stay green.
Gate: zig build + zig build test + 422 examples pass. specs.md + readme.md
updated; issues/0089 RESOLVED banner refreshed.
Reserved type-name spellings (s1, s2, u8, …) can now be used as value
identifiers two ways, resolving issue 0089:
1. Backtick raw identifier: a leading backtick (`s2) lexes to an
.identifier token carrying a new Token.is_raw flag, with the backtick
excluded from the text. A raw identifier is never type-classified — the
parser skips Type.fromName for it — so it is always a value identifier.
The flag threads to VarDecl.is_raw / Param.is_raw at binding sites, and
the reserved-type-name check (UnknownTypeChecker) skips raw bindings.
Because the token tag stays .identifier, the escape works in every
position (local, global, param, field, fn name, struct member, later
reference) with no per-site parser change.
2. #import c exemption: c_import.zig synthesizes foreign decls with
Param.is_raw = true, so generated C param names that collide with
reserved type names (s1, s2) import unedited.
A bare reserved-name binding in sx still errors (issue 0076 preserved):
the is_raw-gated skip only fires for backtick / foreign names, and a raw
binding's address-of / autoref lowering stays correct because every
occurrence is an .identifier, never a .type_expr.
Tests: examples/0151 (backtick, every position),
examples/1220 (foreign exemption, compiled+run), lexer unit tests.
1119 (bare-binding rejection) stays green. specs.md + readme.md updated.
Attempts 1–4 fixed the array-dimension paths but the same length-0
fabrication class survived on every other site that resolves a
compile-time integer. Unify them all on the single shared
`program_index.evalConstIntExpr` so they cannot diverge:
- All three Vector lane resolvers (resolveTypeCallWithBindings,
resolveParameterizedWithBindings, resolveArrayLiteralType) and both
generic value-param binders (instantiateGenericStruct,
instantiateTypeFunction) hand-rolled an `else => 0` switch. A
module-const lane `Vector(N, f32)` fabricated a 0-lane `<0 x float>`
(LLVM "huge alignment" abort); a value-param `Vec(N, f32)` fabricated
a 0 binding / wrong mangled name. They now fold through the shared
evaluator and emit a clean diagnostic + `.unresolved` on a non-const
operand (resolveVectorLane / resolveValueParamArg) — never 0.
- evalComptimeInt (inline-for bounds) delegated to the shared evaluator,
so `inline for 0..M` / `0..(M+1)` fold like array dims. The `<pack>.len`
leaf moved into the shared folder via a new `ctx.lookupPackLen`.
- The unknown-type semantic checker no longer walks a value-param
position (`Vector(N, …)` / `Vec(N, …)`) as a type name (was reporting
"unknown type 'N'").
- The parameterized-type-arg parser and the function-body lookahead
(hasFnBodyAfterArrow) accept a const-EXPRESSION in a value position, so
`Vector(M + 1, f32)` and `[M + 1]T` parse as a return type too (the
latter a pre-existing array-dim sibling that the same heuristic broke).
Regressions: examples/1501 (named-const + const-expr lane, direct +
alias, 3/4-lane reads), 1502 (runtime lane clean-halts, exit 1, no LLVM
crash), 0207 (Vec(N)/Vec(M+1) == Vec(3) instantiation), 0610 (inline-for
const bounds). Shared-evaluator unit test extended with the pack-len arm.
zig build && zig build test && bash tests/run_examples.sh: 395 passed,
0 failed.
The reserved-type-name binding diagnostic fired correctly but underlined the
enclosing statement / if / while / for / match / protocol / #objc_class block
because every binding-name check reused the parent `node.span`.
Thread each binding name's own span through the AST and parser, and pass it to
`checkBindingNames`:
- ast: add name spans to VarDecl, DestructureDecl, If/WhileExpr, ForExpr
(capture + index), MatchArm, Catch/OnFailStmt, Protocol/ForeignMethodDecl.
- parser: populate each span at the binding site from the name token's loc;
destructure reuses each target identifier's own span.
- semantic_diagnostics: every checkBindingName call now passes the binding's
own span — no site falls back to node.span. fn/lambda params already used
Param.name_span.
Carets now land on the offending identifier itself. New regression
examples/1125 asserts the protocol default-body and sx-defined #objc_class
method param spans; 0125/1119-1124 expected updated to the precise carets.
A block's value is now its last statement ONLY when that statement is a
trailing expression with no `;`. A trailing `;` discards the value,
leaving the block void. This makes value-vs-statement explicit and lets
the compiler reject "this block was supposed to produce a value".
Compiler:
- Parser records `Block.produces_value` (last stmt is a no-`;` trailing
expression) + `Block.discarded_semi` (the `;` that discarded a value),
via `expectSemicolonAfter`. A trailing expression before `}` may now
omit its `;` (previously a parse error). Match-arm and else-arm bodies
are built value-producing regardless of the arm `;` (arms are exempt —
the `;` is an arm terminator).
- Lowering: `lowerBlockValue` / the block-expr path / `inferExprType`
respect `produces_value`. A value-position block that discards its value
is a hard error (`lowerValueBody` for function bodies; the value-context
`.block` path for if/else branches, `catch` bodies, value bindings,
match arms). Pure-failable `-> !` bodies (value rides the error channel)
and a value-if whose branches are void are handled without false errors.
- `defer`/`onfail` cleanup bodies lower as statements (void), so a
trailing `;` there is fine.
Migration (behavior-preserving — output unchanged):
- stdlib + ~210 examples: dropped the trailing `;` on value-position last
expressions. `format` now ends with an explicit `#insert "return
result;"` (it relied on `#insert`-as-block-value, which `;` discards).
- Two `main :: () -> s32` examples that relied on the old silent
default-return got an explicit trailing `0`.
- Rejection snapshots 0412 / 1013 regenerated (their quoted source lines
lost a `;`); the diagnostics themselves are unchanged.
Docs/tests: specs.md "Block values" section; examples 0040 (rules) + 0041
(rejection); 3 parser unit tests. Filed issue 0066 (pre-existing
match-arm negated-literal phi-width quirk, surfaced not caused here).
Gates: zig build, zig build test, run_examples.sh -> 343 passed,
cross_compile.sh -> 7 passed (also refreshed its stale example names).
A braced `defer` body routed through `parseExpr` + a mandatory trailing
`;`, so it parsed the `{ … }` as a block-EXPRESSION whose statement loop
doesn't handle a destructure decl or a `catch`-statement — `defer { v, e
:= f(); … }` and `defer { x() catch e … }` failed with "expected ';'",
and even `defer { stmt; }` needed a spurious trailing semicolon.
Now the `kw_defer` arm parses a braced body with `parseBlock` (the same
path `onfail` uses), so every statement form works; the bare-expression
form (`defer expr;`) is unchanged. `in_defer_body` is still set before
parsing, so the cleanup-body control-flow bans (return/break/continue/
try/raise) and the E1.7 failable-absorption check still fire.
Resolves the `defer` manifestation of issue 0065 (the general
value-block-in-binding-position destructure remains open). Regression:
examples/1050-errors-defer-block-body.sx.
Gates: zig build, zig build test, run_examples.sh -> 341 passed, 0 failed.
Probing ERR/E5.1 (composition with closures) surfaced pre-existing closure-
literal lowering bugs: a closure literal passed as a function-type argument and
called inside the callee returns wrong values (block-body 192, arrow-body 20,
want 10 — non-failable too; the working contrast passes the value as a separate
arg, examples/0302). On top of that, failable closure returns don't parse
(isLambda omits .bang — one-line fix in the issue) and arrow-body failable
closures miscompile (return 0); block-body failable closures called directly
work. Runnable repro + parser patch + investigation prompt in the issue.
E5.1 paused per the impassable rule rather than built on miscompiling closures;
the parser fix + a regression example were reverted to avoid landing silently-
miscompiling failable closures on master.
Finishes Phase E4. `process.exit` / `assert` now report the caller's location.
#caller_location + Source_Location:
- new `hash_caller_location` token (lexer) + a leaf `caller_location` AST node
(parser primary-expr; sema + lsp arms).
- `Source_Location :: struct { file; line; col; func }` in std.sx.
- expandCallDefaults rewrites a `#caller_location` param default to a marker
carrying the CALL site's span + source_file.
- lowerCallerLocation synthesizes the struct: file + line:col via
errors.SourceLoc.compute over the diagnostics file→source map, stamped with
the enclosing (caller) function name. inferExprType resolves it to
Source_Location. Explicitly forwarding a Source_Location through an inner
call preserves the outermost site.
namespaced default-param expansion (pre-existing crash): expandCallDefaults
bailed on field_access callees, so `mod.fn(args)` with an omitted defaulted
param passed too few args → LLVM "incorrect number of arguments". Now resolves
the namespace fd (by field / qualified name); method-on-value calls (where
`self` shifts the count) stay excluded. Prerequisite for process.exit/assert
(always called namespaced) taking `loc = #caller_location`.
comptime flush: interp.callForeign flushes the interpreter's buffered print
output before invoking any host symbol, so a comptime diagnostic emitted just
before a terminating `_exit` (process.exit at comptime) survives.
process.exit/assert take `loc: Source_Location = #caller_location`; assert
prints `ASSERTION FAILED at <file>:<line>: <msg>`. examples 250 (assert
file:line), 251 (caller-location + forwarding). The two ffi-objc *.ir
snapshots are regenerated — adding Source_Location to std.sx renumbers the
global string pool the type/field-name tables index (benign, identical IR).
A defer or onfail body runs while the block/function is already exiting, so it
has no target to transfer control to. `raise` was already rejected (E1.3); this
adds the rest of the locked set — `return` / `break` / `continue` / `try`.
In parseStmt, the return/break/continue/try parse sites now call a new
rejectInCleanup() helper, gated on in_onfail_body || in_defer_body (the existing
flags, whose doc-comments already scoped this follow-up). The ban is transitive
through nested catch bodies and loops, but parseLambda clears both flags for the
closure body — a closure is its own function boundary, so a `return` from a
closure created inside a cleanup body stays legal. The diagnostic names the
cleanup kind ("an `onfail`" / "a `defer`").
examples/237-cleanup-body-restrictions.sx covers the rejected forms (exit 1);
six inline parser tests cover each banned exit, the transitive-through-loop
case, the closure-boundary exception, and flag-restore after the defer.
Note: examples/213-canonical-map.sx is the user's uncommitted heterogeneous-
variadic-pack WIP (prints 40 vs expected 42); it fails on the committed parser
too, independent of this change, and is left unstaged.
Gates: zig build, zig build test (288 pass), bash tests/run_examples.sh (all
green except the unrelated 213 WIP).
A match arm `case PAT: (expr)` — e.g. `case 0: (5)` — failed to parse:
parseMatchBody unconditionally consumed an `(` after `case PAT:` as a
payload-capture `(ident)`, so a non-identifier first token produced
"expected capture name".
Disambiguate: treat `(` as a capture only when it encloses exactly a lone
identifier — `( ident )` — via a new isLoneIdentParen() helper (peekTag-based
two-token lookahead). Otherwise the parens belong to the arm-body expression.
Payload capture (`case .b: (v) { ... }`, examples/128) still binds.
This fixes the scalar paren arm value (`case 0: (5)` now parses and runs).
The tuple arm-value form (`case .X: (a, b)`) additionally needs a tuple
literal in statement/binding position, tracked separately as issue 0059.
Tests: two inline parser unit tests (paren arm value is not a capture; lone
`(ident)` still binds). Gates: zig build, zig build test, 273/273 examples.
`raise EXPR` now terminates a failable function via the error channel.
Scope (Option 2): full raise sema checks + lowering for the pure-failable
shape (`-> !` / `-> !Named`); the value-carrying `-> (T..., !)` shape bails
loudly, deferred to E2's error-channel tuple ABI.
- lowerStmt + tryLowerAsExpr: `.raise_stmt` -> lowerRaise (also routes a
raise that is a block's last statement, which previously hit unknown_expr)
- lowerRaise: failable-context check (effectiveReturnType + errorChannelOf);
literal membership via lowerErrorTagLiteral; variable form subset-checked
via checkErrorSetSubset; pure-failable emits ret(tag)
- lowerErrorTagLiteral skips membership for the bare-`!` inferred placeholder
- plain `return;` in a pure-failable fn emits ret(0) (success / no error)
- parser: in_defer_body flag rejects `raise` inside a `defer` body
Tests: examples/219-raise.sx (positive, exit 8),
examples/220-raise-rejections.sx (3 sema rejections, exit 1), inline parser
test for raise-in-defer. Gates: zig build, zig build test, 258/258 examples.
Fills the E0.3 coverage gaps E0.1/E0.2's inline tests hadn't hit and adds
an end-to-end integration parse. Test-only; no production code change.
- `try` in statement position (`try must_init();`).
- `try` over a parenthesized or-chain (`try (foo() or boo())`) — distinct
from `try foo() or try boo()`.
- `or` value-terminator (`parse(s) or 0`).
- Integration: a full `parse :: (s) -> (s32, !ParseErr) { onfail / try / or /
catch / if { raise } / return }` — asserts the trailing `!ParseErr`, the
five body statement kinds, and that `in_onfail_body` is correctly scoped
(the later if-block `raise` is allowed).
Tests stay inline in parser.zig (consistent with the existing 24 + E0.1/E0.2
inline tests). 37 ERR parser tests total; every new AST node has a round-trip
test. zig build test (268) and 254/254 examples green.
Parser-only second step of the error-handling stream. No sema/codegen.
- token: 4 keywords — `raise`, `try`, `catch`, `onfail`.
- ast: RaiseStmt, TryExpr, CatchExpr {operand, binding?, body, is_match_body},
OnFailStmt {binding?, body}.
- parser:
- `try` is a unary prefix (binds tighter than `or`; right-recursive so it
stacks under `xx`/`@`/etc).
- `or` is already left-associative (precedence-climbing loop) — no change.
- `catch` is a postfix with four body shapes (no-binding block / block /
bare-expr / `== { case }` match-body, the latter reusing parseMatchBody
with the binding as subject).
- `raise EXPR;` and `onfail [e] { } | onfail EXPR;` statements; `error`
parses in expression position so `raise error.X` works; raise rejected
in expression position and inside an onfail body (in_onfail_body flag).
- consumer-aware `|>`: pipes the LHS into the head call through a
try/catch/or wrapper, preserving the wrapper.
- print: printExpr + match-arm printing for round-trips (anyerror!void to
break the printExpr<->printMatchArms inferred-error-set loop).
- sema/lsp: exhaustive switch arms for the 4 nodes + 4 keyword tokens.
- tests: ~22 inline parser tests (precedence, all catch forms, both
rejections, pipe cases, round-trip prints incl. match-body).
zig build, zig build test (264), and 254/254 examples green.
The cursor clause now matches the collection form's ': (capture)' — 'for 0..N: (i)' instead of 'for 0..N (i)'. The colon is required when a cursor is present; the no-cursor form 'for 0..N { }' is unchanged. Updated examples/200, the pack-index doc comment, and the spec.
(*x) binds x to a pointer into the collection (index_gep) instead of a per-element value copy: passing it on (e.g. to a *T param) is zero-copy and mutations write back. In a value position x auto-derefs — a binary-op operand loads the element, a pointer-typed slot keeps the pointer, and an 'if x == {...}' match derefs the pointee for its tag/payload. Arrays GEP through their storage so writes hit the original. Regression test: examples/for-by-ref-capture.sx.
The full canonical `map` now compiles and runs (examples/213 → 42):
map :: (mapper: Closure(..sources.T) -> $R, ..sources: VL) -> VL($R)
Final piece: infer a pack-fn's generic return `$R` from a closure-typed
prefix param's lowered return type.
- collectGenericNames descends into closure_type_expr (params + return),
so `$R` in `Closure(..) -> $R` registers as a function type-param.
- matchTypeParam/extractTypeParam descend into closures: `$R` is extracted
from the lowered mapper's closure `.ret`.
- lowerPackFnCall infers type-param bindings from the lowered prefix args,
folds them into the mangle, and threads them into monomorphizePackFn,
which installs self.type_bindings for return-type resolution + body
lowering (`-> VL($R)` ⇒ VL(s64); `Combined($R, ..)` ⇒ Combined(s64, ..)).
s64-elimination follow-through:
- An unbound generic `$R` resolves to `.unresolved` in resolveTypeWithBindings
rather than fabricating an empty-struct stub (`R{}`).
- Lambda return-type inference skips an `.unresolved` target-closure ret and
infers from the body, so the concrete return drives `$R`.
- The `.unresolved` codegen tripwire then caught a latent bug: a generic-struct
source impl (`impl VL($R) for Combined($R, ..$Ts)`) was declaring its template
method `Combined.get` (`-> $R`) as a standalone IR function. Fixed: a
generic-struct source registers methods as TEMPLATES only (findable in
fn_ast_map for per-instance monomorphization via createProtocolThunk), never
declareFunction'd.
Feature 1 (heterogeneous variadic packs) all six phases complete.
248 examples + all unit tests green.
Parser now accepts a `..` spread in a parameterized-type arg list; in
instantiateGenericStruct a spread arg bound to the variadic type-param expands
via packTypeElems (so `..sources.T` projects each source pack element protocol
type-arg into ..$Ts). `Combined(s64, ..sources.T)` for a VL(s64) source
instantiates Combined(s64, s64). examples/209 (with explicit per-element xx
erase). 244 examples + unit green.
Next: (..sources) whole-pack materialization with per-element erasure into the
protocol-typed field (c.sources = (..sources) currently segfaults).
Two fixes:
- Element assignment `t.0 = v` (the known Phase-4.2 gap): the lvalue path
looked the element up by NAME via getStructFields, never matched a tuple
(positional), and left field_ty .unresolved -> ptr(.unresolved) -> codegen
panic. Added a tuple branch to the field-assignment lowering that indexes by
position (numeric) or name (tup.names), mirroring the read path. Fixes
`c.sources.0 = v` on a generic-instance pack field too.
- Named tuples: the parser dropped captured field names for a tuple TYPE
`(x: T, y: U)` (passed field_names=null), and resolveTupleTypeWithBindings
also nulled them. Both now preserve names (synthesizing _<i> for any unnamed
slot), so `t.x` reads/writes by name and `.0` by position.
examples/208. 243 examples + unit green.
A generic struct can take a pack type-param ..$Ts: []Type that binds the
remaining type args as a sequence, and a pack-shaped tuple field (..$Ts)
resolves to a tuple of those per-position types.
- parser/ast: accept a leading .. on a struct generic param; StructTypeParam
gains is_variadic.
- registration: TemplateParam carries is_variadic (and is a type param).
- instantiateGenericStruct: a variadic type-param consumes the remaining args
into pack_bindings + pack_arg_types (mangled into the name); restored after.
- resolveTypeWithBindings: a tuple-literal-as-type containing a pack spread
(e.g. (..$Ts)) expands via packTypeElems.
Instantiate + correct per-position field types + whole-tuple store + element
read all work (examples/205). Not yet: protocol-applied field (..F(Ts)) (the
canonical (..VL(Ts)) shape) and nested element assignment b.pair.0 = v.
240 examples + unit green.
Add range loop syntax:
- runtime for start..end (i) { } counting loop, cursor optional, end exclusive
- comptime inline for start..end (i) { } comptime-unrolled body
The inline form binds the cursor as an int_val comptime constant per
iteration, so xs[i] over a heterogeneous pack substitutes the concrete
per-position element -- the canonical's pack-iteration vehicle
(inline for 0..sources.len (i) { sources[i].addListener(...) }).
- AST: ForExpr.range_end, ForExpr.is_inline
- parser: parseForExpr range vs collection form; suppress_call flag so
N (i) is not read as a call N(i) while parsing a range bound
- lower: lowerRuntimeRangeFor / lowerInlineRangeFor; evalComptimeInt;
comptimeIndexOf extends pack-index resolution beyond int literals
Revises spec's inline for i in 0..N to the no-in, range-first, paren-cursor
form. Regression: examples/200-for-range.sx.
root.zig had no `test` block, so the test binary discovered zero tests and
trivially "passed" — every src test had silently rotted. Add
`refAllDecls(@This())` to root.zig so all 185 tests run, then fix the rot it
surfaced:
- emit_llvm.test: operands were constants, so LLVM folded the very
instructions being asserted (fadd/sub/icmp/insertvalue/extractvalue/sext).
Rewrite to use function-parameter operands; `main` now returns i32 (entry
convention); tagged-union enum_init lowers via memory, not insertvalue.
- interp.test: switch the per-test allocator to an arena (the interpreter is
arena-style and intentionally frees little) — clears the transient-Value
leaks without an ownership-ambiguous source change.
- lower.test: pass `is_imported` to lowerFunction; mark two helpers `pub`; the
if/else block test now uses a runtime (param) condition since lowering folds
`if true`.
- print.test: SSA numbering — params occupy %0/%1, so consts start at %2.
- jni_java_emit.test: nested-class refs render in Java source form
(`SurfaceHolder.Callback`), not the JNI `$` form.
Leaks fixed at the source where ownership was clear: Module gains an arena for
the operand slices the Builder dupes (struct/call/branch/switch args, block
params, lowerFunction params); objcDefinedStateStructType builds its field
slice in that arena and frees its temp name string.
Pack/tuple spread now parses in tuple-value `(..xs)` / `(..xs.field)`,
tuple-type `(..F(Ts))` / `(..F(Ts.Arg))`, call-arg `f(..xs)` (already),
and closure-sig `Closure(..Ts)` / `Closure(..sources.T)` positions.
Design: the uniform spread node is the existing `spread_expr` (its
operand sub-expression carries the projection `xs.field` and
type-application `F(Ts)` shapes) rather than a new PackExpansion node —
call-arg slice-spread (`..arr`) and pack-spread (`..pack`) are
syntactically identical, so they must share one node, and spread_expr
already serves it with working slice lowering. Closure-sig packs gain
`ClosureTypeExpr.pack_projection` alongside the existing `pack_name`.
Parser-only; sema/lowering land in Phase 2. 6 new parser unit tests +
examples/probes/pack-expansion-parses.sx. Build + 225-suite green.
`..xs: Protocol` (a bare protocol, no `[]`, no `$`) on a variadic
parameter now parses to `ast.Param.is_pack = true` — a heterogeneous
protocol-constrained pack, distinct from a slice variadic
(`..xs: []T`, is_pack=false) and the comptime type-pack (`..$args`,
is_comptime=true). Parser-only: sema/lowering for the pack form land in
Phase 2; existing forms are unaffected (zero examples used a bare
non-slice variadic annotation). Adds three parser unit tests and
examples/probes/pack-param-parses.sx.
The special-case `return self.fail("legacy variadic syntax ...")`
in `parseParams` is gone. `parseTypeExpr` already errors naturally
on a leading `..` (now reported as "expected type name"), which
is enough — the language-level cutover happened in the previous
commit; no need for the parser to keep a migration breadcrumb.
Parser hard-rejects the legacy `name: ..T` form with a one-line
migration message pointing at the new `..name: []T` shape. The
leading-`..` form is the one the lowering paths
(`resolveParamType` / `packVariadicCallArgs`) treat as canonical
post-issue-0049; leaving both forms accepted invited the same
class of cross-module emit crashes any time a `..T`-form decl in
stdlib crossed an import boundary.
`specs.md` updated alongside: the Variadic Functions section now
documents `..name: []T` as the surface form, with notes on
homogeneous vs `[]Any` boxing and the `..` spread at call sites.
Inline references to `args: ..Any` in §7 and §8 refreshed.
Step 4A final-slice fix. Bare `$<pack_name>` (no `[<int>]`)
in expression position now parses + lowers to a comptime
`[]Type` slice value carrying one `const_type(TypeId)` per
pack element.
Plumbing:
- src/ast.zig: new `ComptimePackRef { pack_name }` node +
`comptime_pack_ref` variant in Data.
- src/parser.zig: `parsePrimary`'s `$` arm makes `[` optional
after the pack name. With `[<int>]` → existing
`pack_index_type_expr` (single Type value). Without → new
`comptime_pack_ref` (whole pack as []Type).
- src/sema.zig: adds the no-op switch arms for the new node
in `analyzeNode` and `findNodeAtOffset`.
- src/ir/lower.zig: `lowerExpr` arm reads `pack_arg_types[name]`
and calls `buildPackSliceValue(arg_tys)`. The helper allocas
a `[N x Any]` array, emits one `const_type(arg_tys[i])` per
slot, then a slice `{data_ptr, len}` aggregate. No active
binding → focused diagnostic + null slice placeholder. The
IR slice element type is `Any` (matches the today's
`Type → .any` mapping in type_bridge); the interp stores
raw `.type_tag` Values directly (NOT Any-boxed) so
`args[i]` at interp time reads a Type value.
- src/ir/emit_llvm.zig: relaxed `const_type` to silently emit
undef-i64 instead of the previous stderr-noisy bail. Storage
of Type values in runtime aggregates is harmless (undef in,
undef out). Use-site misuse is caught by the bails on
type_name/type_eq/has_impl and the bitcast guard.
`examples/170-pack-bare-value.sx` flips from the parse-error
lock-in to "0/1/3/4" — four call shapes of `len_of(..$args) ->
s64 { list := $args; return list.len; }`. The slice's `.len`
field carries the per-mono pack arity.
210/210 example tests + `zig build test` green.
The remaining 4A.bare slices (4 and 5) — resolveTypeArg
silent-arm fix for index_expr + smoke test of a real builder
walking $args — are separate commits per the cadence rule.
Final slice of the .type_tag activation. Sx code can now
construct Type values through the `$<pack>[<int_literal>]`
syntax in expression position. Lowering emits the new
`const_type(TypeId)` opcode; the interp materialises
`Value.type_tag(TypeId)`; reflection intrinsics + cmp_eq
read it kind-honestly.
Plumbing:
- src/parser.zig: `parsePrimary` accepts `$<ident>[<int_literal>]`
at the front of every expression. Emits a `pack_index_type_expr`
AST node — same node already used in TYPE positions in step 3,
now extended to expression positions.
- src/ir/lower.zig: two places teach the new node.
- `lowerExpr` arm: looks up `pack_arg_types[name][index]`, emits
`builder.constType(arg_tys[index])`. OOB / no-binding paths
emit a focused diagnostic + a `constType(.void)` placeholder
(loud failure preserves silent-error budget).
- `resolveTypeArg` arm: the same lookup, but returns the
TypeId directly. Used by the lower-time fast paths in
`tryLowerReflectionCall` + `tryConstBoolCondition` so
`type_name($args[0])`, `type_eq($args[0], s64)`, and
`has_impl(...)` all see the bound TypeId rather than
falling through to the `.s64` default that the silent-arm
rule forbids.
The two arms ensure both runtime AND compile-time paths use
the same source-of-truth (`pack_arg_types`), so per-mono
dispatch via `inline if type_eq($args[0], s64) { ... }` folds
at compile time as expected.
`examples/169-pack-value-dispatch.sx` exercises both shapes:
- `type_name($args[0])` returns the per-mono concrete type
name ("s64", "string", "f64").
- `inline if type_eq($args[0], s64) { ... }` ladder dispatches
per-mono ("got s64", "got string", "got bool", "got other").
209/209 example tests + `zig build test` green.
What's now possible end-to-end:
show :: (..$args) -> string => type_name($args[0]);
show(42) // "s64"
show("hi") // "string"
describe :: (..$args) -> string {
inline if type_eq($args[0], s64) { return "got s64"; }
...
}
The "by the book" activation is complete:
- foundation (const_type opcode, interp variant, helpers) — 4.0
- interp reflection arms (type_name / type_eq / has_impl) — 4.1
- box_any/display audit + bitcast guard — 4.2
- source-language construction via $args[$i] — 4.3
Step 5 (generic Into(Block) impl in stdlib) is now fully
unblocked — its trampoline body can interpolate per-mono types
both in type positions AND in expression positions.
Step 3 first slice. `$<pack>[<int_literal>]` now parses in
every type position and resolves against the active pack
binding (`pack_arg_types` map set up by `monomorphizePackFn`).
Plumbing:
- src/ast.zig: new `PackIndexTypeExpr { pack_name, index }`
AST node + `pack_index_type_expr` variant in `Data`.
- src/parser.zig: in `parseTypeExpr`'s `$<ident>` arm, peek
for `[`. If found, parse a non-negative `int_literal` index
followed by `]` and emit a `pack_index_type_expr` node.
Plain `$T` / `$T/Eq` paths unchanged.
- src/ir/lower.zig::resolveTypeWithBindings: handles
`pack_index_type_expr` first — looks up the pack name in
`pack_arg_types`, returns `arg_tys[index]` when in range.
OOB and "no active pack binding" cases emit focused
diagnostics at the node span.
- src/ir/type_bridge.zig::resolveAstType: handles the same
node but falls back to `.s64` with a stderr note — the bare
type_bridge has no access to lowering state. Pack-aware
callers route through `resolveTypeWithBindings`.
- src/sema.zig: adds `pack_index_type_expr` to the no-op
arms in `analyzeNode` and `findNodeAtOffset` so the sema
pass doesn't reject the new variant.
Tests:
- examples/165-pack-type-position.sx (lock-in from 69dcee8)
flips from parse error to "42 first". Exercises both a
return-type position (-> $args[0]) AND a local-var
annotation (second : $args[1] = args[1]); two
heterogeneous call shapes confirm distinct monos pick
distinct concrete types per pack index.
- examples/166-pack-type-position-three.sx — three-element
pack with $args[2] (third element) as return type. Three
call shapes: (s64,s64,string), (bool,f64,s64),
(string,string,bool). Prints "third 99 false".
Out of scope (deferred):
- $args[$i] where $i is a comptime-bound expression (only
literal int supported in this slice).
- $args[$i] in fn-pointer type LITERALS (works for named
decls but nested fn type expressions need an audit).
- $args[$i] in struct field types.
206/206 example tests + `zig build test` green.
`parseTypeExpr`'s `Closure(...)` arm now accepts a trailing
`..$name` (sigil optional) as a variadic-pack marker. Pack must
be terminal — `)` is the only token accepted after the name.
`ClosureTypeExpr` AST gains `pack_name: ?[]const u8` carrying the
identifier so later slices can name the binding.
`FunctionInfo` / `ClosureInfo` in src/ir/types.zig grow a
`pack_start: ?u32 = null` field. `Closure(..$args) -> R` interns
as `params = []`, `pack_start = Some(0)` — distinct from any
concrete `Closure(...) -> R` shape thanks to updated hash/eql
arms. New constructor pair `closureTypePack` /
`functionTypePack` keeps the existing single-shape constructors
unchanged.
`type_bridge.resolveClosureType` calls `closureTypePack` when
`pack_name != null`. The pack starts after the fixed prefix,
so `Closure(Prefix, ..$args)` resolves with `params = [Prefix]`,
`pack_start = Some(1)`.
No semantic effect yet — the signature exists in the type table
but no matching code reads `pack_start`. Step 1d wires impl
matching: `Closure(..$args) -> $R` binds against any concrete
closure source type in `tryUserConversion` / `registerParamImpl`.
`examples/154-pack-type-rep.sx` flips from rejecting-with-error
to positive parse smoke (prints "pack type rep ok").
192/192 example tests + `zig build test` green.
Extends parseParams in src/parser.zig:1558 to recognize a leading
`..` before the optional `$` sigil and the parameter name. The
old `args: ..T` form (variadic marker after the colon) still
works — both paths set the same `is_variadic` flag.
A pack declaration `..$args` parses as:
- `is_variadic = true` (from the leading `..`)
- `is_comptime = true` (from the `$` sigil)
- `type_expr = inferred_type` (no `:` annotation)
The no-colon branch now propagates `is_variadic` and `is_comptime`
onto the Param struct so later slices (type rep, impl matching,
monomorphisation) can read both flags from the parsed AST without
re-deriving from token sequence.
`examples/150-pack-parse.sx` flips from rejecting-with-error to
positive parse smoke. No semantic effect yet — `foo` is declared
but never instantiated.
191/191 example tests + `zig build test` green.
Inside a '#objc_class { ... }' block, 'name :: Type = expr;' is
accepted alongside the existing method form. Parsed as sugar for
'name :: () -> Type => expr;' — a niladic class method with an
expression body. The synthesized class method flows through the
M2.1(b) class-method pipeline: a C-ABI IMP is emitted and
registered on the metaclass.
Apple's runtime sees zero distinction — '[Cls foo]' dispatches to
our IMP regardless of source spelling. The constant form is
purely syntactic sugar; it reads better for static metadata
returns:
SxGLView :: #objc_class("SxGLView") {
layerClass :: Class = CAEAGLLayer.class();
}
vs. the equivalent method form:
layerClass :: () -> Class => CAEAGLLayer.class();
Parser change: after 'name ::' if the next token isn't '(' we
take the constant branch — parse a type expr, expect '=', parse
the value expr, expect ';'. The result is a ForeignMethodDecl
with is_static=true, empty params, return_type=Type, body=block
wrapping the expr. Pure parser-level transformation; no new AST
nodes, no new lowering passes.
150-objc-class-level-constant.sx exercises both shapes on macOS:
a primitive (s32 answer) and a pointer ('*NSObject seedClass'
— the canonical '+layerClass'-style factory return).
180 example tests pass (+1). zig build test green.
M2.1 complete: both (a) the constant form and (b) the
expression-bodied class method shape land.
Next: M2.2 — 'field: T #property(modifiers...)' synthesizes
getter/setter pairs.
Extends parseForeignClassDecl ([src/parser.zig:1262]) with an
arrow arm that mirrors the existing parseFnDecl shape — single-
expression body wrapped in a one-statement block so downstream
lowering sees the same AST as a brace-body method.
Closes the M1.0 surface: '=> expr;' is now valid for top-level
functions, struct methods, AND '#objc_class' member methods.
The sx-defined class lowering (A.7 dispatch gate) is still gated,
so 140-expression-bodied-objc-method.sx exercises parse-only —
the body is reachable but the method is never invoked. When M1.2
lights up sx-defined class instantiation, the arrow-body form
will flow through unchanged.
169 examples pass (+1 from 140 now green); zig build test green.
Make-green half of the cadence step started in A1. Wires the
`#selector` directive end-to-end:
- Lexer token `hash_selector` at src/token.zig + lookup row in
src/lexer.zig.
- AST field `selector_override: ?[]const u8 = null` on
`ForeignMethodDecl` (src/ast.zig).
- Parser block in src/parser.zig that mirrors
`#jni_method_descriptor` — both occupy the same slot after the
optional `-> ReturnType` and before the body/terminator. Not
mutually exclusive at parse time.
- LSP semantic-token list (src/lsp/server.zig) updated.
- Lowering: `deriveObjcSelector` returns
`{ sel, keyword_count, is_override }`. When `is_override` is true,
the selector string is the user's literal and `keyword_count` is
the colon count in that literal. Both `lowerObjcMethodCall` and
`lowerObjcStaticCall` use the result.
Diagnostic policy when override colon-count ≠ call arity:
- Default mangling path: stays an error (`.err`). The user can fix
the sx-side name to produce the right keyword count.
- Override path: downgrades to a warning (`.warn`). Rationale:
Obj-C's `objc_msgSend` doesn't validate colon-vs-arg the way JNI's
`GetMethodID` validates the descriptor — the runtime dispatches
regardless and the wrong-arity case becomes silent calling-
convention corruption. The compiler is the last line of defense
for this typo class, but the warning preserves the override's
escape-hatch character (deliberate mismatches still proceed).
Snapshot for `examples/ffi-objc-dsl-06-selector-override.sx` flips
from the pre-3.2 parser-error to working output:
static override non-null: true
The mismatch diagnostic text in
`examples/ffi-objc-dsl-04-mismatch.sx`'s snapshot is updated to
drop the "once that lands (3.2)" phrasing now that 3.2 is here.
165/165 example tests.
`static name :: ...` was redundant — instance methods always declare
`self: *Self` as their first param by convention. The parser now derives
`is_static` from the first param's TYPE: if it's `*Self` the method is
an instance method; anything else (including no params at all) is a
class method. Removes a token from the surface, keeps the dispatch
behavior identical.
The receiver param's NAME doesn't matter — only its type. Calling the
first param `this`, `me`, `receiver`, etc. is fine as long as the type
is `*Self`. This mirrors how the rest of sx handles receiver dispatch.
Migration of every site that used the keyword:
- `library/modules/platform/android.sx` — `SurfaceView.new(ctx)`.
- `examples/ffi-jni-class-03-static.sx` — `Math.abs(n)`.
- `examples/ffi-jni-main-03-ctor.sx` — `SurfaceView.new(ctx)` in the
`#jni_main` body.
- `examples/ffi-objc-dsl-05-static.sx` — NSObject's `.class()` /
`.description()`.
164/164 example tests; chess clean on macOS / iOS sim / Android via
`tools/verify-step.sh`.
The session-long set of changes that lay the groundwork for the
Jai-literal implicit-Context-parameter refactor. Lots of accumulated
work; the new arrival is the implicit-ctx foundation (steps 1+2 of
the plan in current/CHECKPOINT-MEM.md):
Step 1 — `CAllocator :: struct {}` stateless allocator in
library/modules/allocators.sx, delegating directly to
libc_malloc/libc_free. `ConstantValue` in src/ir/inst.zig gains a
`func_ref: FuncId` leaf so nested aggregates can carry function
pointers (the inline Allocator value's fn-ptr fields). Switch
sites updated in emit_llvm.zig, print.zig, interp.zig.
Step 2 — `emitDefaultContextGlobal` in src/ir/lower.zig synthesises
a static `__sx_default_context` global with a nested-aggregate
init_val pointing at the CAllocator → Allocator thunks. The
second-pass `initVtableGlobals` in emit_llvm.zig is generalised
to handle `.aggregate` init_vals (re-emits after func_map is
populated so func_ref leaves resolve to real symbols).
Also folded in from earlier work this session:
- Phase 1.1: `xx value` heap-copy in `buildProtocolValue` routes
through `context.allocator` via the new `allocViaContext` helper.
- interp.zig: `marshalForeignArg` double-offset bug fixed —
`heapSlice` already adds `hp.offset` to the slice ptr, so the
extra `+ hp.offset` was scribbling memcpy/memset into adjacent
heap state, corrupting `heap.items[0]`. Symptom: `build_format`
at comptime produced zero bytes, all `print` calls failed.
- Lazy lowering: `lazyLowerFunction` now declares foreign-body
functions as extern stubs in the local (comptime) module so
cross-module foreign calls resolve.
- Allocator API: all stdlib allocators on one-line `init() -> *T`
(CAllocator/GPA: libc-backed; Arena/TrackingAllocator: parent-
backed; BufAlloc: embeds state at head of user buffer).
- issues 0038 (transitive #import), 0039 (chess + stdlib migration
fallout), 0040 (generic struct method dot-dispatch), 0041
(pointer types as type-arg), 0042 (alias name resolution) — all
fixed; regression tests in examples/.
- Diagnostic: `emitError` now embeds the lowering's
`current_source_file` and enclosing function in the literal
message; SX_TRACE_UNRESOLVED=1 dumps a Zig stack trace at the
emit site so misattributed spans can't hide where the failure
is.
- tools/verify-step.sh (all-platforms gate) and tools/scratch.sh
(interp/codegen parity tester) added.
Test suite: 152 example tests pass; chess builds + screenshots on
macOS / iOS sim / Android.
Campaign Weeks 3-6 of /Users/agra/.claude/plans/lets-plan-to-move-splendid-pumpkin.md
land in one push: the bundling pipeline that used to live in
src/target.zig (createBundle, embedFramework, extractEntitlements,
buildInfoPlist, codesign) now lives in
library/modules/platform/bundle.sx and runs in the IR interpreter
after target.link() returns.
New language-side surface:
- library/modules/fs.sx — POSIX libc bindings (open/read/write/close,
mkdir/unlink/rmdir, chmod, rename, access, basename/dirname). Variadic
open() lowers to C's varargs via the new args: ..T form. Direct libc
calls bypass *File method dispatch so they work from the post-link
IR interpreter.
- library/modules/process.sx — popen-based run(cmd) returning
ProcessResult{ exit_code, stdout }, plus env() and find_executable().
- library/modules/std.sx — xml_escape(s) and variadic path_join(parts).
- library/modules/compiler.sx — BuildOptions grows
set_post_link_callback / set_post_link_module / binary_path
accessors; bundle_path/bundle_id/codesign_identity/provisioning_profile
setters + accessors; per-target predicates is_macos/is_ios/
is_ios_device/is_ios_simulator + target_triple; framework_count /
framework_at(i) / framework_path_count / framework_path_at(i);
add_asset_dir(src, dest) + asset_dir_count / src_at / dest_at.
Compiler-side wiring:
- src/ir/compiler_hooks.zig — BuildConfig now carries post_link_callback_fn,
post_link_module, binary_path, bundle_*, target_triple,
target_frameworks, target_framework_paths, asset_dirs. Hook registry
exposes every accessor; getters return "" / 0 for unset fields so
bundle.sx can treat absent values uniformly.
- src/ir/host_ffi.zig (new) — dlsym(RTLD_DEFAULT) + arity-switched cdecl
trampolines so #foreign("c") declarations resolve through the host
libc during #run / post-link interpretation.
- src/ir/interp.zig — callForeign dispatch; build_config pointer
injection so accessor hooks see live state during re-entry.
- src/core.zig — keeps the IR module alive past generateCode; exposes
invokeByName / invokeByFuncId so main.zig can re-enter the
interpreter after linking.
- src/main.zig — wires bundle/codesign/provisioning CLI flags +
target_triple + framework lists into BuildConfig; invokes the
post-link callback (by FuncId or by <module>.bundle_main lookup) once
target.link() returns. When --bundle is set but no callback is
registered, auto-falls-back to post_link_module = "platform.bundle"
so the legacy --bundle CLI keeps working for any program that imports
modules/platform/bundle.sx.
Apple .app bundler (library/modules/platform/bundle.sx):
- Single bundle_main entry covers macOS, iOS simulator, iOS device.
Per-target Info.plist switch keys off is_ios()/is_ios_simulator() —
iOS emits UIDeviceFamily / LSRequiresIPhoneOS /
UIApplicationSceneManifest / DTPlatformName (iPhoneOS or
iPhoneSimulator); macOS emits the minimal CFBundle* set.
- iOS-only steps:
- Provisioning embed: fs.read_file + fs.write_file to
<bundle>/embedded.mobileprovision.
- Framework embed: recursive cp -R per -F search path into
<bundle>/Frameworks/<Name>.framework/ (until fs.sx grows list_dir).
- Entitlements extraction: four process.run calls (security cms -D,
plutil -extract Entitlements xml1, plutil -extract
ApplicationIdentifierPrefix.0, plutil -replace application-identifier)
resolving the wildcard <TEAM>.* -> <TEAM>.<bundle_id>.
- Real codesign with --entitlements when present.
- Asset dirs (add_asset_dir): recursive cp -R src/. into <bundle>/dest/.
Missing src is treated as "nothing to do" so projects can register
add_asset_dir("assets", "assets") unconditionally.
Parser:
- parseStmt() now accepts #import \"path\"; and #framework \"Name\"; as
statement-position tokens. Needed for top-level
inline if OS == .android { #import \"modules/platform/android.sx\"; }
blocks (issue-0042 flatten pass surfaces them); chess's
inline-if-with-#import was rejected at parse time before this fix.
Removals from src/target.zig:
- createBundle, embedFramework, extractEntitlements, buildInfoPlist,
codesign (~210 lines). main.zig no longer calls createBundle after
link(); the sx callback is the single entry point.
Tests / regression markers (all run under sx run host JIT):
- examples/115-post-link-callback.sx — callback registration round-trip.
- examples/116-fs-roundtrip.sx — fs.write_file -> fs.read_file -> exists.
- examples/117-process-roundtrip.sx — process.run + env + find_executable.
- examples/118-macos-bundle.sx — macOS .app via bundle_main callback.
- examples/119-interp-cast-ptr-cmp.sx — cast(T) val under interpreter.
- examples/120-interp-variadic-any.sx — variadic ..Any indexing in IR
interpreter.
- examples/121-ios-sim-bundle.sx — iOS-sim cross-compile + .app with
iOS-shaped Info.plist (added to tests/cross_compile.sh as the
ios-sim tuple).
- examples/122-ios-device-bundle.sx — iOS device cross-compile +
full codesign pipeline (provisioning embed + entitlements
extraction + --entitlements codesign). Manually verified end-to-end:
installed via xcrun devicectl device install app + launched
successfully on iPhone 17 Pro.
- examples/123-inline-if-import-in-body.sx — locks in the parser fix.
zig build && zig build test && bash tests/run_examples.sh => 141 passed,
0 failed; bash tests/cross_compile.sh => 7 passed, 0 failed.
Flip the surface semantics for type-introducer directives: bare
`Foo :: #jni_class("path") { ... }` now means "DEFINE a new Java class
at that path" (sx-side provides the implementations). The `#foreign`
prefix modifier flips it back to "REFERENCE an existing class on the
foreign runtime." Matches how `#foreign` already reads in sx for C
function declarations (`printf :: ... #foreign;`).
Foo :: #foreign #jni_class("path/to/Foo") { ... } // reference
Foo :: #jni_class("path/to/Foo") { ... } // define
Foo :: #jni_main #jni_class("path/to/Foo") { ... } // define + main Activity
Compiler-side changes:
- New `hash_jni_main` lexer token (the launchable-Activity marker).
Existing `hash_foreign` is reused; no new modifier token there.
- `ForeignClassDecl` gains `is_foreign: bool` + `is_main: bool`.
`ForeignMethodDecl` gains `body: ?*Node` so defined-class methods
can carry sx-side implementations (foreign-class methods stay
`;`-terminated).
- Parser learns `tryParseForeignClassPrefix` — peek-and-consume the
modifier tokens, then dispatch to the unchanged
`parseForeignClassDecl` with the flags threaded through.
- Sema rejects two illegal combinations: `#foreign + #jni_main`
(can't be both an external reference and the app's main entry),
and bodied methods on `#foreign` decls (foreign methods are
runtime-provided).
- Lower's foreign-class dispatch errors on non-foreign decls with
a pointer to the runtime-synthesis follow-up; defined-class
codegen (Java class emission, RegisterNatives wiring, manifest
entry generation) lands in a separate session.
Migration:
- `library/modules/platform/android_jni.sx`: all four foreign class
decls (`Activity`, `Window`, `View`, `WindowInsets`) gain `#foreign`.
- `examples/ffi-jni-class-{01..08}*.sx`: every test's `#jni_class` /
`#jni_interface` / `#objc_class` / `#objc_protocol` / `#swift_class`
/ `#swift_struct` / `#swift_protocol` usage gains `#foreign`. All
9 files mechanical perl rename; snapshots unchanged.
Verified locally:
- `zig build test` clean.
- `bash tests/run_examples.sh` 129/129.
- `bash tests/cross_compile.sh` 3/3.
- Chess APK rebuilds, reinstalls, launches on Pixel; safe-area
clearance preserved.
New `hash_jni_env` lexer token; `parsePrimary` dispatches to a small
`parseJniEnvBlock` that consumes `(env) { body }` and returns a new
`JniEnvBlock` AST node (env_expr + body block).
Sema's analyzeNode arm recurses into env + body inside a pushed
scope; findNodeAtOffset descends through both children for go-to-
definition.
Lowering treats it as a syntactic wrapper around the block: env is
evaluated for side effects, body lowers as a normal block. The TL
push/pop semantics (synthesizing the env stack so `#jni_call`'s env
arg can become optional) land in 2.16b.
`expectSemicolonAfter` recognises `jni_env_block` as block-form so
statement-position uses don't need a trailing `;` — matches `if` /
`while` / `for` / bare blocks.
Test runs through the block body and prints expected output; xfail
snapshot flips to green. 127/127 examples green.
Six new lexer tokens (`hash_jni_interface`, `hash_objc_class`,
`hash_objc_protocol`, `hash_swift_class`, `hash_swift_struct`,
`hash_swift_protocol`) join the existing `hash_jni_class`. All seven
share the body grammar from Phases 2.1–2.6.
AST refactored: `JniClassDecl` → `ForeignClassDecl` with a
`runtime: ForeignRuntime` enum discriminator; `JniMethodDecl` →
`ForeignMethodDecl` (with `jni_descriptor_override` renamed for
clarity since it's JNI-only); `JniFieldDecl` → `ForeignFieldDecl`;
`JniClassMember` → `ForeignClassMember`. AST variant renamed
`jni_class_decl` → `foreign_class_decl`.
`parseForeignClassDecl` takes the runtime as a parameter; the
`parseConstBinding` dispatch table now maps each of the seven
directive tokens to its `ForeignRuntime` variant via
`foreignRuntimeForCurrent`. No codegen yet — Phase 3 picks up Obj-C
runtime, Phase 4 picks up Swift. Runtime-specific body items (fields,
descriptor override) are validated at sema time in later steps.
126/126 examples green.
New `hash_jni_method_descriptor` lexer token + LSP keyword
classification. `JniMethodDecl` gains `desc_override: ?[]const u8`.
parseJniClassDecl accepts an optional `#jni_method_descriptor("...")`
clause between the return type and the terminating `;`, stashing the
literal as the override. Auto-derivation in Phase 2.8 will treat
this as the precedence override when present.
The 2.6 xfail commit (0ed4799) used the working name `#desc` in its
test file; this commit renames to `#jni_method_descriptor` for
parallel naming with the rest of the FFI directive set (`#jni_call`,
`#jni_class`, `#jni_env`, ...). Test snapshot flips xfail → green.
125/125 examples green.
