Mihaela M
990a2d2e42
An explicit key (`?`) may have no key node: `? : v`, a trailing `? }` / `? ]` / `? ,`, or `?` at the end of a flow mapping all denote a null key. The parser now emits an empty key in those positions instead of failing to find a node before the value indicator or terminator. Fixes suite case DFF7 (parse-level conformance 316 -> 317); adds tests.
27 lines
1.2 KiB
Swift
27 lines
1.2 KiB
Swift
extension PureYAML.Parsing.TokenEventParser {
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/// The key node of an explicit (`?`) mapping entry. The key may be empty: `? : v`, a trailing
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/// `? }` / `? ]` / `? ,`, or `?` at stream end all denote a null key. With no node and no
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/// properties to anchor, emit a null scalar rather than failing to find a node.
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mutating func parseExplicitMappingKey(
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properties: PureYAML.Parsing.NodeProperties,
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) throws -> PureYAML.Parsing.NodeResult {
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guard properties == .none, isAtEmptyExplicitKey else {
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return try parseNode(properties: properties)
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}
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let mark = cursor.current?.mark ?? cursor.previous?.endMark ?? .start
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try emit(.scalar(value: "", anchor: nil, tag: nil, style: .plain, mark: mark))
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return PureYAML.Parsing.NodeResult(kind: .scalar, endMark: mark)
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}
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/// Whether an explicit key has no key node: the next token is the value indicator, a flow
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/// terminator (`}`, `]`, `,`), or the stream has ended.
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var isAtEmptyExplicitKey: Bool {
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switch cursor.current?.kind {
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case nil, .mappingValue, .flowMappingEnd, .flowSequenceEnd, .flowEntry:
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true
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default:
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false
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}
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}
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}
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