PureYAML/Sources/Parsing/TokenEventParser.Flow.swift

84 lines
3.0 KiB
Swift

extension PureYAML.Parsing.TokenEventParser {
mutating func parseFlowSequence(
properties: PureYAML.Parsing.NodeProperties,
) throws -> PureYAML.Parsing.NodeResult {
let start = try expect("flow sequence start") { kind in
if case .flowSequenceStart = kind {
return true
}
return false
}
let startMark = properties.mark ?? start.mark
var endMark = start.endMark
events.append(.sequenceStart(
anchor: properties.anchor,
tag: properties.tag,
style: .flow,
mark: startMark,
))
while cursor.current != nil {
if case .flowSequenceEnd = cursor.current?.kind {
let end = try expect("flow sequence end") { kind in
if case .flowSequenceEnd = kind {
return true
}
return false
}
endMark = end.endMark
events.append(.sequenceEnd(mark: endMark))
return PureYAML.Parsing.NodeResult(kind: .sequence, endMark: endMark)
}
if case .flowEntry = cursor.current?.kind {
_ = cursor.advance()
continue
}
endMark = try parseNode().endMark
if cursor.current?.kind.isFlowTerminator == false {
throw unexpectedToken(expected: "flow entry or flow sequence end")
}
}
throw unexpectedToken(expected: "flow sequence end")
}
mutating func parseFlowMapping(
properties: PureYAML.Parsing.NodeProperties,
) throws -> PureYAML.Parsing.NodeResult {
let start = try expect("flow mapping start") { kind in
if case .flowMappingStart = kind {
return true
}
return false
}
let startMark = properties.mark ?? start.mark
var endMark = start.endMark
events.append(.mappingStart(
anchor: properties.anchor,
tag: properties.tag,
style: .flow,
mark: startMark,
))
while cursor.current != nil {
if case .flowMappingEnd = cursor.current?.kind {
let end = try expect("flow mapping end") { kind in
if case .flowMappingEnd = kind {
return true
}
return false
}
endMark = end.endMark
events.append(.mappingEnd(mark: endMark))
return PureYAML.Parsing.NodeResult(kind: .mapping, endMark: endMark)
}
if case .flowEntry = cursor.current?.kind {
_ = cursor.advance()
continue
}
endMark = try parseMappingPair().endMark
if cursor.current?.kind.isFlowTerminator == false {
throw unexpectedToken(expected: "flow entry or flow mapping end")
}
}
throw unexpectedToken(expected: "flow mapping end")
}
}