mbeckerle commented on a change in pull request #262: Unordered sequences
URL: https://github.com/apache/incubator-daffodil/pull/262#discussion_r320355667
##########
File path:
daffodil-core/src/main/scala/org/apache/daffodil/grammar/primitives/SequenceCombinator.scala
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@@ -76,3 +78,63 @@ class OrderedSequence(sq: SequenceTermBase,
sequenceChildrenArg: Seq[SequenceChi
}
}
}
+
+class UnorderedSequence(sq: SequenceTermBase, sequenceChildrenArg:
Seq[SequenceChild], alternatives: Seq[Gram])
+ extends SequenceCombinator(sq, sequenceChildrenArg) {
+
+ private lazy val sepGram = sq.sequenceSeparator
+ private lazy val sepParser = sepGram.parser
+ private lazy val sepUnparser = sepGram.unparser
+
+ private lazy val sequenceChildren = sequenceChildrenArg.toVector
+
+
+ private lazy val parsers = {
+ val res = alternatives.map { alt =>
+ val p = alt.parser
+ val res =
+ if (p.isEmpty)
+ new EmptyChoiceBranchParser(alt.context.runtimeData)
Review comment:
Steve is correct. All children of an unordered sequence must be elements, so
this case is not possible.
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