The tagged-node validator carried its own copy of the validation machinery: a Tagged.Rule cloning Validation's check type and a Tagged.Context cloning its context, differing only in subject type. That is the per-layer duplication the validation idiom exists to prevent (principle 10). Generalise the type-directed framework over both the subject and the document: SubjectContext, Check, and AnyCheck now take a Document type parameter for the validated tree's root. The model layer validates with a Model.Value document, the tagged layer with a Tagged.Node document, each truthful rather than forcing one root type to stand in for the other. The tagged layer keeps only what is genuinely its own: the Node document type, its built-in check (now Tagged.BuiltinCheck, a Check<Node, Node>), and its traversal. Tagged.Rule and the tagged Context are removed. The validator surface is unchanged but validating now takes a Check<Node, Node>. All 399 tests pass; the coverage gate reconciles to 62 public types.
22 lines
837 B
Swift
22 lines
837 B
Swift
public extension PureYAML.Validation {
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/// The read-only bundle a type-directed check receives: the whole `document` (for cross-cutting
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/// checks), the current `subject` of the check's type, and the `path` to where it sits. `Document`
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/// is the type of the validated tree's root, so each layer carries a truthful document: `Model.Value`
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/// for the model tree, `Tagged.Node` for the tagged tree.
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struct SubjectContext<Subject: Validatable, Document: Sendable>: Sendable {
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public var document: Document
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public var subject: Subject
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public var path: Path
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public init(
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document: Document,
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subject: Subject,
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path: Path,
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) {
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self.document = document
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self.subject = subject
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self.path = path
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}
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}
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}
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