mbeckerle commented on a change in pull request #385:
URL: https://github.com/apache/incubator-daffodil/pull/385#discussion_r430426236
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File path:
daffodil-runtime1/src/main/scala/org/apache/daffodil/dsom/CompiledExpression1.scala
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@@ -143,7 +143,7 @@ final case class ConstantExpression[+T <: AnyRef](
lazy val sourceType: NodeInfo.Kind = NodeInfo.fromObject(value)
- def isKnownNonEmpty = value != ""
+ def isKnownNonEmpty = value != "" && value != "%ES;" && !(value == "%WSP*;"
&& qn.toQNameString == "dfdl:initiator")
Review comment:
An idea: just push the responsibility to answer the question "can match
empty string" down to a method of the DFADelimiter, and all DFADelimiters
except ESDelim and WSPStarDelim answer false, those two answer true.
I'm not sure it's that simple though. There can be escape-schemes involved I
think.
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