[edusperoni]

Adoption step 0 of rfcs#58 ("interop and runtime helpers"). interop moves into builtin modules, and the global interop becomes a compat layer built from them. Android counterpart: NativeScript/android#2074.

Modules

Module	Exports
ns:interop	Pointer, Reference, FunctionReference, sizeof, alloc, free, handleof, stringFromCString, types (the C primitives: void, bool, int8…uint64, ulong, slong, float, double)
ns:interop/ios (also ns:interop/visionos, ns:interop/macos)	adopt, bufferFromData, types (id, class, selector, protocol, unichar, noop)
ns:runtime (new members)	escapeException, setExternalSize, getExternalSize

• Exports and their types objects are frozen, like the other ns: modules.
• The aliases resolve to ns:interop/ios before any cache lookup, so require returns the same exports object and ESM gets the same module (one namespace object).

The global interop

• Built by runtime/js/interop-global.js, which requires the three modules through the builtin require. The ns: files never refer to it.
• Same key set as today, and every member (including all 20 types) is === its module export.
• The object is still mutable, and the interop property is still enumerable.
• It's now a lazy global (kLazyGlobals), built on first read. No C++ reads it.
• inline-functions.js (the @ObjCMethod/@ObjCParam decorators) gets void from ns:interop at decorator time, so apps that never touch interop don't build these modules.

Native changes

• The 20 type objects are created once per isolate, on first use (a StateFor slot). GetInteropType hands them out when marshalling pointer and C-string results, so they have to exist even if no JS ever loads ns:interop. noop still wins the shared void encoding.
• Workers no longer register interop twice. They used to end up with two sets of type objects, so the marshaller's types and interop.types were different objects. There's now one set per isolate.
• Pointer, Reference, FunctionReference and Unmanaged already create their constructors lazily, so native marshalling never depends on the module having loaded.

Types

• types/ns-interop.d.ts and types/ns-interop-ios.d.ts, plus the ns:runtime additions, all shipped with the runtime and referenced from types/index.d.ts.
• Pointer, Reference<T>, FunctionReference<T>, Type<T>, StructType<T>, Unmanaged<T> and AdoptedPointer are module exports. That means generated declarations can write import type * as interop from "ns:interop" and keep their existing interop.Pointer references unchanged.
• bufferFromData(data: NSData & object) relies on an empty global interface NSData {}.
  • With @nativescript/types-ios in the program, it merges into that package's NSData class.
  • Without it, any object is accepted.
• The global interop declaration stays in @nativescript/types-ios. Switching it to alias these modules is a follow-up there.

Tests

• New NsInteropTests.js, with a worker fixture and an ESM fixture. It covers:
  • export key sets;
  • frozen exports;
  • alias identity under require, static import and dynamic import();
  • that the global's key set is unchanged and every member is === its module export, on the main thread and in a worker.
• Results:
  • Full suite: 1853 passed, 0 failed. Baseline was 1835, and the 18 new specs account for the difference.
  • ASan: 1853 passed, 0 failed, no reports.

Open points

• Error messages still say interop.setExternalSize … / interop.escapeException …, including when called through ns:runtime. They were left as-is because existing tests and docs match on them.
• interop.initializer / interop.Args (rfcs#56) aren't on main yet. They'll join ns:interop when that lands.

Summary by CodeRabbit

• New Features

  • Added built-in interop modules for C and Apple-platform types, with macOS and visionOS aliases for the iOS module.
  • Exposed native memory, pointer, reference, and type utilities through the modules and the global interop compatibility layer.
  • Added runtime utilities for exception handling and external-memory size reporting.
  • Added TypeScript declarations for the new modules and utilities.

• Documentation

  • Expanded built-in module documentation with interop exports, platform availability, and alias guidance.

[coderabbitai]

Walkthrough

The runtime now exposes interop through ns:interop and ns:interop/ios, with platform aliases for macOS and visionOS. A JavaScript compatibility layer assembles the global interop object. Runtime exports, type declarations, documentation, and tests are updated.

Changes: Interop module split and integration

Layer / File(s)	Summary
Native interop bindings and type maps NativeScript/runtime/Interop.h, NativeScript/runtime/InteropTypes.mm	Native registration now has separate general and Apple binding entry points. Primitive type maps are cached per isolate, and the type-creation helper returns a type object.
Built-in registration and runtime exports NativeScript/runtime/NsBuiltinModules.cpp, NativeScript/runtime/Runtime.mm, NativeScript/runtime/js/ns-runtime.js, types/ns-runtime.d.ts, TestRunner/app/tests/NsRuntimeTests.js, docs/ns-builtin-modules.md	The registry adds interop built-ins and platform aliases, and canonicalizes requested specifiers for registration checks, export lookup, and module lookup. The runtime binding and module expose exception-escaping and external-size functions. Runtime initialization no longer registers interop types directly.
JavaScript modules and global compatibility object NativeScript/runtime/LazyGlobals.cpp, NativeScript/runtime/js/*, tools/js2c-inputs.xcfilelist, eslint.config.mjs	New JavaScript modules expose core and Apple interop bindings. The lazy global assembles exports from the interop and runtime modules. Lazy global entries now supply their own property attributes, and the interop global is enumerable.
Interop contracts, documentation, and tests types/index.d.ts, types/ns-interop*.d.ts, TestRunner/app/tests/NsInteropTests.js, TestRunner/app/tests/esm/ns-interop-import.mjs, TestRunner/app/tests/nsInteropIdentityWorker.js, TestRunner/app/tests/index.js, docs/README.md, docs/ns-builtin-modules.md	Declarations and documentation describe module exports, aliases, and runtime functions. Tests cover module resolution, exports, native operations, global composition, and worker identity.

Estimated code review effort: 3 (Moderate) | ~30 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Importer
  participant NsBuiltinModules
  participant Interop
  Importer->>NsBuiltinModules: Request an interop specifier
  NsBuiltinModules->>NsBuiltinModules: Canonicalize platform aliases
  NsBuiltinModules->>Interop: Invoke the registered binding factory
  Interop->>NsBuiltinModules: Provide native binding exports
  NsBuiltinModules->>Importer: Resolve the canonical module

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Suggested reviewers: darind, nathanwalker

Merge Risk: Minimal · up to 9f1ca

The change moves interop into builtin modules and keeps the global compatibility object. No actionable merge-blocking risk was found.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 10.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title "feat(runtime): ns:interop builtin modules, global interop as compat" names the main change. The PR adds the builtin ns:interop and ns:interop/ios modules, with aliases for macOS and visionO…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title "feat(runtime): ns:interop builtin modules, global interop as compat" names the main change. The PR adds the builtin ns:interop and ns:interop/ios modules, with aliases for macOS and visionOS, and makes the global interop a lazy, mutable compatibility object built from those modules. The title also matches the PR objectives and the file-level summaries. It is concise, has no file list or emoji, and uses a conventional commit prefix. Its abbreviation "compat" is minor and does not make the title misleading.

Full details: Docstring Coverage

Explanation

Docstring coverage is 10.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 10 functions across 17 files. (5 skipped: 5 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Finishing Touches

Generate docstrings

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• Create a new PR

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Clang (23.1.4)

NativeScript/runtime/LazyGlobals.cpp

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: clang-tidy NativeScript/runtime/LazyGlobals.cpp -- -std=c++17 -I./NativeScript -I./TKLiveSync -I./TestFixtures -I./project-template-ios -I./project-template-vision -I./metadata-generator -I./llvm -I./llvm/17.0.6/include/llvm/Support -I./llvm/17.0.6/include/llvm/CodeGen -I./llvm/17.0.6/include/llvm/Analysis -I./llvm/17.0.6/include/clang/AST -I./llvm/17.0.6/include/llvm/IR -I./llvm/17.0.6/include/llvm/ADT -I./llvm/17.0.6/include/clang/Basic -I./llvm/17.0.6/include/llvm/MC -I./NativeScript/runtime -I./llvm/17.0.6/include/polly/isl -I./llvm/17.0.6/include/llvm/Object -I./llvm/17.0.6/include/clang/Frontend -I./llvm/17.0.6/include/clang/Sema -I./llvm/17.0.6/include/clang/Lex -I./llvm/17.0.6/include/llvm-c -I./llvm/17.0.6/include/polly -I./llvm/17.0.6/include/llvm/CAS -I./llvm/17.0.6/include/clang/Driver -I./llvm/17.0.6/include/llvm/ObjectYAML -I./llvm/17.0.6/include/clang-c -I./llvm/17.0.6/include/clang/Tooling -I./llvm/17.0.6/include/llvm/BinaryFormat -I./llvm/17.0.6/include/llvm/XRay -I./llvm/17.0.6/include/llvm/TextAPI -I./llvm/17.0.6/include/clang/Analysis -I./llvm/17.0.6/include/clang/Serialization -I./llvm/17.0.6/include/lld/Common -I./llvm/17.0.6/include/clang/Index -I./llvm/17.0.6/include/llvm/ProfileData -I./llvm/17.0.6/include/polly/CodeGen -I./TKLiveSync/libzip -I./llvm/17.0.6/include/llvm/ExecutionEngine -I./llvm/17.0.6/include/llvm/Remarks -I./metadata-generator/src/Meta -I./llvm/17.0.6/include/llvm/MCA -I./llvm/17.0.6/include/llvm/TargetParser -I./llvm/17.0.6/include/polly/Support -I./metadata-generator/src/Binary -I./llvm/17.0.6/include/clang/CodeGen -I./llvm/17.0.6/include/llvm/TableGen -I./llvm/17.0.6/include/llvm -I./llvm/17.0.6/include/clang/ExtractAPI -I./TestFixtures/Api

1. parser at end of file
2. ASTMatcher: Matching 'bugprone-pointer-arithmetic-on-polymorphic-object

NativeScript/runtime/NsBuiltinModules.cpp

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: clang-tidy NativeScript/runtime/NsBuiltinModules.cpp -- -std=c++17 -I./NativeScript -I./TKLiveSync -I./TestFixtures -I./project-template-ios -I./project-template-vision -I./metadata-generator -I./llvm -I./llvm/17.0.6/include/llvm/Support -I./llvm/17.0.6/include/llvm/CodeGen -I./llvm/17.0.6/include/llvm/Analysis -I./llvm/17.0.6/include/clang/AST -I./llvm/17.0.6/include/llvm/IR -I./llvm/17.0.6/include/llvm/ADT -I./llvm/17.0.6/include/clang/Basic -I./llvm/17.0.6/include/llvm/MC -I./NativeScript/runtime -I./llvm/17.0.6/include/polly/isl -I./llvm/17.0.6/include/llvm/Object -I./llvm/17.0.6/include/clang/Frontend -I./llvm/17.0.6/include/clang/Sema -I./llvm/17.0.6/include/clang/Lex -I./llvm/17.0.6/include/llvm-c -I./llvm/17.0.6/include/polly -I./llvm/17.0.6/include/llvm/CAS -I./llvm/17.0.6/include/clang/Driver -I./llvm/17.0.6/include/llvm/ObjectYAML -I./llvm/17.0.6/include/clang-c -I./llvm/17.0.6/include/clang/Tooling -I./llvm/17.0.6/include/llvm/BinaryFormat -I./llvm/17.0.6/include/llvm/XRay -I./llvm/17.0.6/include/llvm/TextAPI -I./llvm/17.0.6/include/clang/Analysis -I./llvm/17.0.6/include/clang/Serialization -I./llvm/17.0.6/include/lld/Common -I./llvm/17.0.6/include/clang/Index -I./llvm/17.0.6/include/llvm/ProfileData -I./llvm/17.0.6/include/polly/CodeGen -I./TKLiveSync/libzip -I./llvm/17.0.6/include/llvm/ExecutionEngine -I./llvm/17.0.6/include/llvm/Remarks -I./metadata-generator/src/Meta -I./llvm/17.0.6/include/llvm/MCA -I./llvm/17.0.6/include/llvm/TargetParser -I./llvm/17.0.6/include/polly/Support -I./metadata-generator/src/Binary -I./llvm/17.0.6/include/clang/CodeGen -I./llvm/17.0.6/include/llvm/TableGen -I./llvm/17.0.6/include/llvm -I./llvm/17.0.6/include/clang/ExtractAPI -I./TestFixtures/Api

1. parser at end of file
2. ASTMatcher: Matching 'bugprone-pointer-arithmetic-on-polymorphic-o

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_{A rabbit checks the types at play,
Then hops through modules on its way.
Core and Apple maps align,
Runtime exports join the line.
A global gathers what they share,
While tests confirm the bindings there.}

[coderabbitai]

---

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Failed pre-merge checks:
- Docstring Coverage:
Write docstrings for the functions missing them to satisfy the coverage
threshold.

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Commits

Reviewing files that changed from the base of the PR and between 600f903 and 9f1ca57.

Files selected for processing: 24

• NativeScript/runtime/Interop.h
• NativeScript/runtime/InteropTypes.mm
• NativeScript/runtime/LazyGlobals.cpp
• NativeScript/runtime/NsBuiltinModules.cpp
• NativeScript/runtime/Runtime.mm
• NativeScript/runtime/js/README.md
• NativeScript/runtime/js/inline-functions.js
• NativeScript/runtime/js/interop-global.js
• NativeScript/runtime/js/ns-interop-ios.js
• NativeScript/runtime/js/ns-interop.js
• NativeScript/runtime/js/ns-runtime.js
• TestRunner/app/tests/NsInteropTests.js
• TestRunner/app/tests/NsRuntimeTests.js
• TestRunner/app/tests/esm/ns-interop-import.mjs
• TestRunner/app/tests/index.js
• TestRunner/app/tests/nsInteropIdentityWorker.js
• docs/README.md
• docs/ns-builtin-modules.md
• eslint.config.mjs
• tools/js2c-inputs.xcfilelist
• types/index.d.ts
• types/ns-interop-ios.d.ts
• types/ns-interop.d.ts
• types/ns-runtime.d.ts

Files with no reviewable changes: 2

• eslint.config.mjs
• NativeScript/runtime/Runtime.mm

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