https://issues.dlang.org/show_bug.cgi?id=13764

          Issue ID: 13764
           Summary: std.getopt: throw an UnknownOptionException rather
                    than Exception
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: trivial
          Priority: P1
         Component: Phobos
          Assignee: nobody@puremagic.com
          Reporter: danny.milo@gmail.com

It would be nice if std.getopt would throw something like an UnknownOptionException rather than the very nondescript Exception it does now.

As it is now, it's hard to tell harmless "user errors" from serious internal errors. Also, having to use string matching to find out which it is isn't so nice.

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