Uploaded image for project: 'HPCC'
  1. HPCC
  2. HPCC-14454

CHOOSE(0) constant-folded incorrectly

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 6.0.0, 5.6.0
    • Component/s: Code Generator
    • Labels:
      None

      Description

      For the following code...

      toText(UNSIGNED1 i) := CHOOSE(i,'one','two','elsevalue');
      OUTPUT(toText(0));
      OUTPUT(toText(1));
      OUTPUT(toText(2));
      OUTPUT(toText(3));
      OUTPUT(toText(4));

      The values 1 and 2 yield their counterparts, and the values 3 and 4 yield 'elsevalue' as expected. However, passing 0 yields 0.

      Shouldn't passing 0 yield 'elsevalue'?

      I do see I'm violating the expected type of input, as the first parameter is described in the user's guide as "An arithmetic expression that results in a positive integer and determines which value parameter to return". However, given the elsevalue is broadly described as "The value to return when the expression returns an out-of-range value", it seems more logical to return it rather than lapse into undefined behavior.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                ghalliday Gavin Halliday
                Reporter:
                leonarta Todd Leonard
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: