pkatlic opened a new pull request, #1136:
URL: https://github.com/apache/daffodil/pull/1136

   Throw a SDE during compilation if the fn:count function is called on a path 
expression that ends with a unique scalar element.
   
   DAFFODIL-2711
   
   Expression.scala: Add checkArgArray function to check for an array element 
and call for fn:count expression.
   
   DState.scala: Remove isAnArray function since it is now redundant.
   
   FNFunctions.scala: Fix typo.
   
   PrefixedTests.tdml: Update element to use fn:exists instead of fn:count.
   
   expressions.tdml: Update element to use fn:exists instead of fn:count.
   
   Functions.tdml: Add test cases using fn:count on arrays of length 1 and 2 
using inputValueCalc, outputValueCalc, and occursCount expressions. Fix 
assertion messages. Update tests that now result in errors.
   
   TestDFDLExpressions.scala: Add new test cases for Functions.tdml.


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