GitNexus/gitnexus/test/fixtures/lang-resolution/python-inline-constructor-receiver
Gergő Magyar bc76ba2f25
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fix(resolution): type inline constructor receivers in every spelling (#2708) (#2737)
* fix(resolution): resolve constructor-expression receivers (#2708)

`Service(db).do_work()` emitted no CALLS edge, so the caller was missing
from `impact(direction: "upstream")` and `context()` while the two-step
spelling of the same call (`s = Service(db)` then `s.do_work()`) resolved.

The receiver reaches `resolveCompoundReceiverClass` intact — Case 0 in
`receiver-bound-calls` routes it there because the text contains `(`. The
free-call branch then only knew one shape: a function whose return-type
binding names a class. A class has no return-type binding, so `Service`
resolved to nothing and the member call was dropped.

Handle the constructor shape: in languages that construct without a `new`
keyword (Python, Kotlin, Swift, Scala) a free call naming a class IS a
constructor call, so the expression's type is that class. The existing
return-type path still runs first and wins, keeping this strictly
additive — `new`-keyword languages never reach the new line because their
receiver text keeps the keyword (`new Service(db)`), which matches no
class binding.

Verified on the issue's 4-file repro: `route_inline` now emits
`CALLS → Service.do_work` and `impactedCount` goes 1 → 2.

Note the issue's second ask — degrading `epistemic` to `lower-bound` when
a receiver goes unresolved — is NOT addressed here.
`computeEpistemicBoundary` keys only on the target's own heritage edges
and runs at query time against the index, while unresolved references
live in an in-memory `resolutionOutcomes[]` that is never persisted. That
needs unresolved-receiver counts in the index first, so it is left for a
follow-up.

Tests: new `python-inline-constructor-receiver` fixture plus three
integration cases (inline resolves, two-step still resolves, no
cross-class fan-out). Two of the three fail without the source change.
Full `test/integration/resolvers` suite passes (2928 tests) — the fix is
shared across every language, so no-regression coverage matters more than
the new cases. Python captures golden regenerated: additions only, no
existing digest changed, confirming capture output is untouched.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* refactor(resolution): state the construction rule once, cover every spelling (#2708)

The first commit fixed `Service(db).do_work()` by special-casing a bare
class-name callee inside the free-call branch of the compound receiver
resolver. That was the right rule in the wrong place: it covered one
surface syntax out of three, and asserted rather than declared which
languages it applied to.

Probing the same shape across languages showed the bug is wider:

  | spelling               | languages          | dropped before? |
  |------------------------|--------------------|-----------------|
  | `Service(db).m()`      | Python             | yes             |
  | `new Service(db).m()`  | JS/TS, Java, C#    | yes             |
  | `Service.new.m()`      | Ruby               | yes             |
  | both forms             | PHP, Swift, Dart,  | no — already    |
  |                        | Kotlin             | resolved        |

So the rule is stated once — "constructing a class yields an instance of
that class" — and the per-language surface syntax is declared through a
new `ScopeResolver.constructionSyntax` hook, matching how this file
already gates language-varying behaviour (`stripReceiverCastExpressions`,
`hoistTypeBindingsToModule`). Shared pipeline code names no language.

  - `bare: true`      — Python
  - `keyword: 'new'`  — JS/TS, Java, C#
  - `selector: 'new'` — Ruby, including the parenthesis-less `Service.new`
    spelling that reaches the chain walker rather than the call branch

Opt-in is per-language for two reasons. Correctness: `bare` would mistype
`stat(&st).field` in C, where a struct and a function may share a name.
Evidence: PHP, Swift, Dart and Kotlin resolve this shape already, so they
stay unwired instead of carrying a declaration that changes nothing —
each verified by diffing analyzer output between builds with and without
the change, not assumed.

The keyword gate also keeps a bare factory call honest: in a `new`
language, `makeOther(db).doWork()` still resolves through the factory's
return type and is never read as constructing a same-named class.

Tests: TypeScript fixture (inline `new`, a plain `.js` file for the
javascript provider, two-step, and the factory guard) and a Ruby fixture
(`Service.new` with and without an argument list, plus two-step). With
the source change stashed, the inline cases fail and the factory/two-step
cases still pass. The Python cases from the first commit are unchanged.

No Kotlin fixture: its cases passed without the change, so they would
document coverage this commit does not provide.

Full `test/integration/resolvers` + `test/unit/scope-resolution`: 4234
passed, 1 skipped. Ruby captures golden regenerated — additions only, no
existing digest changed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(resolution): only treat a construction selector as construction on the class itself (#2708)

The `selector: 'new'` rule fired on any receiver whose type was class-like,
which is true both when the receiver IS the class constant (`Factory.new`) and
when it is a value of that class (`factory.new`). `isClassLike(...)` cannot
tell those apart, so an instance receiver took the construction path too and
skipped the member lookup that should have run.

That replaced a CORRECT edge with a wrong one. Measured against the base build
on a class defining an instance method `new` returning a `Product`:

  factory = Factory.new; factory.new.run
    before this PR:  Product#run   (correct)
    after  this PR:  Factory#run   (wrong)

Track whether resolution currently sits on the class constant or on a value of
that class, and apply the selector rule only to the former. The head of a chain
is a class constant only when it resolved straight to a class binding rather
than through a typeBinding; every hop past it yields a value, so the flag
clears. The `obj.method()` branch derives the same fact from whether `objExpr`
is a bare name resolving to that class.

`Factory.new.run` keeps the behaviour this PR introduced (Factory#run), which
is itself a fix over the base build's Product#run.

KNOWN LIMITATION, now documented on the contract field and asserted by a test
so a future change to it is deliberate: a class-level override
(`def self.new` returning another type) is still read as construction. The
scope model records no staticness per member, so `def new` and `def self.new`
are indistinguishable at this layer; separating them needs the language
provider to record staticness first. An earlier attempt to use
`TypeRef.source` as a proxy was abandoned after tracing showed Ruby records
body-inferred return types as `return-annotation` too, so it does not
discriminate.

Tests: `ruby-construction-selector` fixture pins all three shapes — class
constant, instance receiver, and the documented class-level-override
limitation. Ruby resolver suites: 185 passed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(resolution): resolve generic construction receivers (#2708)

`new Box<string>().unwrap()` reached the class lookup as `Box<string>`, which
names no class binding, so the member edge was still dropped while the
non-generic spelling resolved. `new Foo<T>()` is ordinary in all three
keyword-wired languages, so the fix covered a materially narrower slice of
real code than intended.

Retry the lookup on the base name via `stripTemplateArguments` — the same
normalization `resolveClassBindingForName` already applies to typed receivers
in the sibling `receiver-bound-calls` pass. The exact-name lookup still runs
first, so a class whose name legitimately contains `<` is unaffected.

Measured on the probe that first showed the gap:

  before: | viaGeneric | Class:src/box.ts:Box |            (construction edge only)
  after:  | viaGeneric | Method:src/box.ts:Box.get#0 |     (member edge resolved)

Tests: `viaGenericCtor` added to the typescript-inline-constructor-receiver
fixture, asserting both the target file and that the resolved id is `Box`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(resolution): resolve construction in the chain-head position (#2708)

`new Service(db).inner.deep()` emitted only the construction edge. The chain
walker seeds its starting class from the head segment, which arrives as
`new Service(db)` and reduces via `stripCallParens` to `new Service` — no
binding and no class of that name, so the walk was never seeded and every
segment after it resolved to nothing.

Seed the head through the same construction rule the call branch already uses.
A constructed value is an instance, so the class-constant flag from the
previous commit correctly stays false — `new Factory().new` does not get the
selector treatment.

The gap was asymmetric across the languages this PR wires: Python's bare form
strips to a plain `Service` and was already seeded, so only the keyword
languages were affected.

Tests: `viaChainHead` added to the typescript-inline-constructor-receiver
fixture. Note the fixture annotates `readonly inner: Inner` explicitly —
with an unannotated initializer the walk stops at the field, which is
field-type inference and a separate concern from head seeding.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(resolution): match the construction keyword by token, not by one space (#2708)

The keyword form was matched with `startsWith(`${keyword} `)`, so only a
single space separated `new` from the type. Any other trivia the source used
— a tab, a line break — failed the match and the member-call edge was lost.

Match the keyword as a whole token followed by one or more whitespace
characters instead. `newService()` still fails the match, which is the point:
it is an ordinary call, not a construction, and must keep resolving through
its own return type.

The keyword is escaped before it enters the pattern. It comes from a language
provider rather than from user input, but a keyword containing a regex
metacharacter would otherwise build a silently wrong pattern.

Tests: tab-separated and newline-separated `new` added to the
typescript-inline-constructor-receiver fixture. Note these cases only survive
because `gitnexus/test/fixtures/` is listed in the repo-root `.prettierignore`
— running prettier from inside `gitnexus/` does not pick that file up and
normalizes the tab away.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(resolution): resolve qualified construction callees (#2708)

`new ns.Service().doWork()` emitted only the construction edge. The call
branch splits the callee at its last `.` before construction is considered,
so a qualified type name was routed into `obj.method()` resolution as if
`ns` were a receiver and `Service` a member.

A keyword-marked expression is never a member call, so resolve it as
construction before the split. The callee lookup now also handles a dotted
name: an unambiguous `qualifiedNames` match first, then the trailing simple
name, mirroring how receiver resolution elsewhere in this pass degrades.

Measured:

  before: | viaQualified | Class:src/svc.ts:Service |            (construction only)
  after:  | viaQualified | Method:src/svc.ts:Service.doWork#0 |

Bare-form qualified construction (Python `models.User(db).save()`) is NOT
addressed here: that shape currently emits no edges at all, including no
construction edge, so it is a namespace-import resolution gap upstream of
this pass rather than a construction-typing one.

Tests: `viaQualifiedCtor` added to the typescript-inline-constructor-receiver
fixture.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* fix(java): drop the unreachable constructionSyntax declaration (#2708)

Java was wired `{ keyword: 'new' }`, and the PR described it as one of the
languages that needed the fix. Measuring both ways shows it never did: Java
resolves `new Svc().doWork()` identically with and without the change,
because `java/captures.ts` (#2564) already rewrites an
`object_creation_expression` receiver to the constructed type's simple name,
so the raw `new Svc()` text never reaches this resolver.

The decisive evidence is generics: Java resolves `new Box<User>().doWork()`,
which the keyword path could not do before the template-argument fix earlier
in this series — the resolution demonstrably comes from the capture rewrite,
not from here.

Removing the declaration rather than leaving it as defensive configuration:
an unreachable per-language opt-in reads as coverage that does not exist, and
the contract now records why Java is excluded so the omission is not mistaken
for an oversight.

Verified after removal: the Java probe still resolves both the inline and
two-step spellings, and the Java resolver suites pass (252 passed, 1 skipped).

An earlier coordinator measurement in this review claimed Java WAS broken on
base; that comparison was invalid (the "without fix" build had not been
rebuilt). Corrected here.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* refactor(resolution): state the selector rule once and derive its option type (#2708)

Two follow-ups from review, no behaviour change (643 resolver tests pass
unchanged before and after):

The `Class.new` selector rule was written out twice — in the `obj.method()`
branch and again in the chain walker — against differently named locals,
while the construction helper's own doc comment claimed the rule was stated
in exactly one place. Both sites ask the identical question, so they now call
one `isConstructionSelectorHop` predicate, and the doc comment says what is
actually true.

`ResolveCompoundReceiverOptions.constructionSyntax` re-declared the contract's
object shape by hand. It was the file's first object-shaped duplicate, and
because the value arrives as a non-literal variable, TypeScript's excess
property check would not fire: a sub-field added to the contract later would
type-check and then be silently ignored here. It is now derived with
`ScopeResolver['constructionSyntax']`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* test(resolution): cover the C# construction path and pin the wiring inventory (#2708)

Three coverage gaps from review, no behaviour change.

C# had no fixture despite being the only keyword-wired language whose
behaviour genuinely depends on the construction rule — measured absent on base
and present on head. `csharp-inline-constructor-receiver` covers the inline
spelling, the two-step spelling, and a static factory that must keep resolving
through its return type rather than being read as construction.

The TypeScript two-step assertion checked only `toContain('Service')`, and the
same fixture defines `LegacyService` — `'LegacyService'.includes('Service')` is
true, so the assertion could not distinguish the two targets. It now pins
`targetFilePath` the way its sibling assertions already do.

Nothing guarded the deliberate opt-in set, so an accidental wiring of a
language that already resolves the shape, or a silent loss of one that needs
it, would pass the whole suite. `construction-syntax-wiring.test.ts` pins the
inventory in both directions: exactly which languages declare
`constructionSyntax` and with which spelling, and that java/php/swift/dart/
kotlin stay unwired.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* chore(storage): bump INCREMENTAL_SCHEMA_VERSION to 23 for the #2708 edge changes

This series changes which CALLS edges are emitted for source whose CONTENT has
not changed — inline constructor receivers that previously emitted nothing now
resolve, and the Ruby selector fix moves one edge back to the member it always
belonged to. That is precisely the class of change the version-history block in
this file requires a bump for, and the reuse gate is a strict equality on the
persisted stamp.

Without it, every existing v22 index passes the gate on the next `analyze` —
or is served by the same-commit "already up to date" fast path — and keeps
returning the pre-fix graph for unchanged files. `impact(direction: "upstream")`
and `context()` would go on omitting the very callers #2708 is about, with no
warning, until something unrelated forced a full re-analyze. The fix would
have shipped without reaching anyone who already had an index.

Precedent is unbroken across the recent resolution PRs: #2723 → v22,
#2699 → v21, #2695 → v20, #2563 → v14, each with its own rationale paragraph.
This adds v23 in the same form.

The pinned assertion in call-summary-schema-version.test.ts moves with it, as
that test documents it is designed to.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* chore(bench): re-baseline the fixture-corpus fingerprints for #2708

Both bench harnesses fingerprint an entire fixture corpus by directory prefix
(`bench/python-scope/measure.mjs:38`, `bench/scope-capture/measure.mjs:76`), so
every fixture directory this series adds moves a committed baseline. Neither
script writes the baseline itself — running without `--check` only prints, and
the file is edited deliberately, which is what its own comment asks for.

Regenerated, last in the series so the fixture set was final:

  bench/python-scope/baseline-fingerprint.txt   36e29abc… -> f120df92…
  bench/scope-capture/baselines.json  ruby       070e4e11… -> fea3edf8…
                                      typescript 281e9548… -> cad25be9…
                                      csharp     e05dc274… -> 05a85bae…

CI only ever reported the python drift, because the benchmarks job runs the
python step first and aborts there; the cross-language step never ran. Both
were verified locally after the update:

  [measure --check] PASS (capture fingerprint + scaling)
  [import-target-fingerprint --check] PASS (resolver fingerprint)
  [scope-capture --check] PASS (15 languages)

The `csharp` and `ruby` entries moved because of the fixtures added earlier in
this series, not the original ones — a reminder that this baseline moves with
any fixture addition, not just the one that first triggered it.

Captures goldens regenerated alongside (csharp, ruby); both additive only, no
existing digest changed. The python golden did not move: no `python-*` fixture
was added after its last regeneration.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqnsJK3Cnbu3bjdZbzgMMP

* Update tests for passesReuseGate function

---------

Co-authored-by: Gergo Magyar <gergomagyar0@gmail.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-29 16:19:53 +01:00
..
models fix(resolution): type inline constructor receivers in every spelling (#2708) (#2737) 2026-07-29 16:19:53 +01:00
app.py fix(resolution): type inline constructor receivers in every spelling (#2708) (#2737) 2026-07-29 16:19:53 +01:00