Mihaela Mihaljevic
5c306482e5
Replace the notImplemented stub with a real parser built on a pull-based, streaming event core that never requires the whole document in memory. - Parsing.EventReader: pulls characters through a source closure with a bounded lookahead buffer and emits one Parsing.Event at a time, holding only an open-element stack. Drives chunked/streamed input. - Parsing.Parser: builds a Model.Node tree iteratively over the event core (explicit stack, no recursion). - Reader: streaming character cursor (closure-backed, bounded buffer) replacing the previous whole-string Array. - EntityDecoder: the five predefined entities and decimal/hex char references. - Handles elements, attributes, text, comments, CDATA, processing instructions, and an XML declaration in the prolog. Rejects <!DOCTYPE> by default (no DTD/XXE/entity-expansion exposure). - Top-level API: parse(_:), parse(pulling:), events(_:), events(pulling:). - 21 tests including event-stream and chunked-source coverage.
63 lines
2.9 KiB
Swift
63 lines
2.9 KiB
Swift
public extension PureXML.Parsing {
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/// Parser error with source position information when available.
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enum ParseError: Swift.Error, Equatable, Sendable, CustomStringConvertible {
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case emptyDocument
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case unexpectedEndOfInput(Mark)
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case unexpectedCharacter(Character, Mark)
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case unterminatedTag(Mark)
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case unterminatedComment(Mark)
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case unterminatedCDATA(Mark)
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case mismatchedEndTag(expected: String, found: String, Mark)
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case duplicateAttribute(name: String, Mark)
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case expectedName(Mark)
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case expectedEquals(Mark)
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case unquotedAttributeValue(Mark)
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case invalidReference(String, Mark)
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case unexpectedEndTag(name: String, Mark)
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case junkAfterDocumentElement(Mark)
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/// A `<!DOCTYPE ...>` declaration was found. DTD processing is disabled by
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/// default as a security posture (XXE, entity-expansion DoS); enabling it
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/// is a deliberate future opt-in, not silent behavior.
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case unsupportedDoctype(Mark)
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/// Raised by entry points whose parsing path is not implemented yet.
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case notImplemented(String)
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public var description: String {
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switch self {
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case .emptyDocument:
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"document is empty"
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case let .unexpectedEndOfInput(mark):
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"unexpected end of input at \(mark)"
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case let .unexpectedCharacter(character, mark):
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"unexpected character '\(character)' at \(mark)"
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case let .unterminatedTag(mark):
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"unterminated tag starting at \(mark)"
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case let .unterminatedComment(mark):
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"unterminated comment starting at \(mark)"
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case let .unterminatedCDATA(mark):
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"unterminated CDATA section starting at \(mark)"
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case let .mismatchedEndTag(expected, found, mark):
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"expected </\(expected)> but found </\(found)> at \(mark)"
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case let .duplicateAttribute(name, mark):
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"duplicate attribute '\(name)' at \(mark)"
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case let .expectedName(mark):
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"expected a name at \(mark)"
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case let .expectedEquals(mark):
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"expected '=' after attribute name at \(mark)"
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case let .unquotedAttributeValue(mark):
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"attribute value must be quoted at \(mark)"
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case let .invalidReference(reference, mark):
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"invalid reference '\(reference)' at \(mark)"
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case let .unexpectedEndTag(name, mark):
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"unexpected end tag </\(name)> at \(mark)"
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case let .junkAfterDocumentElement(mark):
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"content after the root element at \(mark)"
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case let .unsupportedDoctype(mark):
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"DTD processing is disabled (DOCTYPE at \(mark))"
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case let .notImplemented(detail):
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"not implemented: \(detail)"
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}
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}
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}
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}
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