Malte Ubl
1a14263b5f
Every ScrArr carried sixteen words, seven of them (sparse slots, their length and capacity, noncanonical numeric properties with length and capacity, and match-result metadata) used only by sparse arrays, arrays with numeric non-index properties and regex match results. They now live in a ScrArrExt the array points at, allocated on first use: a dense array shrinks from 128 to 80 bytes, and a cycle-capable one (with its 16-byte collector header) from 144 to 96. Runtime readers go through a shared empty ext; writers allocate it. The backend mirror loses the seven fields, tagged-template arrays are emitted with a NULL ext, live stream commits swap the ext pointer (which swapped all seven fields before), and the cached typed-view refresh swaps sparse slots and properties through scr_arr_swap_indexed_ext, keeping each array's metadata as before. The program-object ABI marker moves to scr_runtime_abi_v11. A corpus program (4610-array-ext-dyn-refresh.ts, with its order baseline) pins numeric non-index properties of a dynamically typed array through its refreshed typed view, sparse slots written directly and through a live reference, truncation, and regex match metadata read directly, through `any` and after a copy.
External program object
This macOS arm64 example links a scriptc program object, a small C FFI implementation, and the exact installed precompiled runtime pack. It uses no scriptc cache path.
$ clang -target arm64-apple-macosx14.0.0 -O2 -c native.c -o native.o
$ scriptc build main.ts --ffi ffi.json --print=native-link-info -o app.o > link-info.json
$ node link.mjs cc link-info.json app-cc
$ ./app-cc
42
$ node link.mjs ld link-info.json app-ld
$ ./app-ld
42
cc uses the C compiler as a linker driver. ld links the same precompiled runtime objects directly with the selected Apple SDK. The object defines main; it is a complete program object, not a library to load into another process. Use scriptc build --lib --profile ... for a host-callable static library.
The external object ABI is experimental. Always consume the runtime pack at the exact runtime_pack.version reported by the same scriptc installation. The object requires scr_runtime_abi_v11, so a mismatched runtime fails during the link instead of starting with an incompatible ABI.