Mihaela Mihaljevic
f02561b01d
Surface the parsed <!DOCTYPE> internal subset's <!ELEMENT> declarations from the parser and validate a tree against them. Reimplemented from the DTD content-model spec; no upstream code copied. - DoctypeScanner captures <!ELEMENT name model> declarations; the parser surfaces them as Parsing.DocumentType (via parseWithDocumentType). - Validation.ContentModel + ContentModelParser parse a model string (EMPTY, ANY, (#PCDATA), mixed, and element content with sequence/choice and ?/*/+). - ContentModelMatcher matches the child element-name sequence against a model as a regular language (NFA-position matching). - Validation.DTDSchema.validate reports issues for EMPTY/PCDATA/mixed violations, element content with stray text, and child sequences that do not match. - PureXML.validateAgainstInternalDTD(_:) parses and validates in one call. - ATTLIST validation is out of scope. 9 tests; 70 total.
16 lines
594 B
Swift
16 lines
594 B
Swift
extension PureXML.Validation {
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/// A DTD element content model, as declared by `<!ELEMENT name ...>`.
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enum ContentModel: Equatable {
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/// `EMPTY`: the element must have no content.
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case empty
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/// `ANY`: any content is allowed.
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case any
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/// `(#PCDATA)`: character data only, no child elements.
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case pcdata
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/// `(#PCDATA | a | b)*`: text mixed with zero or more of the named elements.
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case mixed([String])
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/// Element content: a particle the child element sequence must match.
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case children(Particle)
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}
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}
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