When swiftly is absent, check-wasm.sh fell back to the active `swift`. The Xcode-bundled
Apple toolchain has no WebAssembly LLVM codegen backend, so a wasm cross-compile through
it does not fail cleanly: it aborts deep inside LLVM (clang module build, "No available
targets are compatible with triple wasm32-...") with a multi-megabyte stack dump that
reads like a code bug. The SDK-presence check passed (the SDK is installed) and the build
crashed anyway, so the real cause, the wrong host toolchain, was invisible.
Detect it up front and exit 2 with an actionable message. Discriminate by the compiler's
self-reported build tag, not its path: both toolchains print "Apple Swift version X", but
the Xcode/Apple build tags it "(swiftlang-...)" while a swift.org toolchain tags it
"(swift-...-RELEASE/SNAPSHOT)". The self-report is authoritative however `swift` is
symlinked or shimmed, which a path-string match would miss. `swift -print-target-info
-target wasm32-...` is not a usable probe: it succeeds even without the backend, because
the frontend knows the triple and only codegen is missing.
PureXML.XPath.Budget is the configurable counterpart of libxml2's
fixed 10M node-set cap (libxml2Compatible preset included), thrown as
a located QueryError instead of a silent refusal, default unbounded.
xsl:sort honors lang with tailored alphabet orders for Polish and
Russian derived from the conformance golds, case-folded. The WASM
gate executes all 985 tests under wasmtime on an actual WASI runtime,
wired into CI; the first run caught a real wasm32 trap (Int is 32
bits there, so format-number's digit extraction trapped at 2^31
despite the 2^53 guard; internals are now Int64 and the xsl:number
bound is platform-correct). Xalan baseline 127 -> 125. Closes#143,
closes#144.
Root Swift package mirroring PureYAML's structure, rules, and verification
gates. Includes the XML node model (Node, Element, Attribute, QualifiedName),
a working emitter (Serializer) with escaping and pretty/compact options, and
structural validation. The parser surface is stable; parse() raises
notImplemented until the scanner lands, pinned by a test.
- dependency-free, namespaced under PureXML
- portability and style gates carried over (style, namespacing, forbidden
patterns, swiftformat, swiftlint, linux, wasm, windows CI)
- 11 tests passing
