Mihaela Mihaljevic
1ae6680d94
Add PureXML.XPath: a compiled location-path query engine reimplemented from the XPath 1.0 specification; no upstream code copied. - Compiler parses a path into steps; Evaluator walks the tree returning a Selection node-set (node or attribute) in document order. - Forward axes only (child, descendant //, self ., attribute @), since the value model has no parent pointers. Node tests: name, *, text(), node(), comment(). Predicates: [n], [@a], [@a='v'], [child], [child='v']. - Public surface: XPath.Query (init compiles, evaluate/elements/strings), the Selection enum (element / stringValue), QueryError, and the one-shot PureXML.xpath(_:over:). Upward/sibling axes and the full expression language are explicitly out of scope. - 12 XPath tests; 61 total.
10 lines
261 B
Swift
10 lines
261 B
Swift
extension PureXML.XPath {
|
|
/// One compiled location step: an axis, a node test, and zero or more
|
|
/// predicates applied in order.
|
|
struct Step: Equatable {
|
|
let axis: Axis
|
|
let test: NodeTest
|
|
let predicates: [Predicate]
|
|
}
|
|
}
|