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EProgrammerNotFound exception in Delphi? – Stack Overflow

Posted by jpluimers on 2021/10/19

From a long while my answer to [WayBack] EProgrammerNotFound exception in Delphi? – Stack Overflow (I added the WayBack links)

It was introduced in Delphi 2009, still present in Delphi 2010, and [WayBack] recently got some [WayBackmore attention on the [WayBackinternet.

I think it is an easter egg, similar to [WayBack] “EBCAK” (Error Between Chair and Keyboard), and the [WayBack] skipping of Delphi version number 13.

[WayBack] EProgrammerNotFound

  • is declared in the Win32 branch of the SysUtils unit, but not used anywhere in the RTL or VCL
  • is not present in Delphi Prism
  • was introduced in Delphi 2009, so not present in VCL.NET
  • has currently (version 3.5) nothing similar in the .NET framework (not sure why, these guys [WayBack] do have humour)

I don’t think EProgrammerNotFound is actually meant to be used at all, but since it is there, people will jokingly use it (similar like putting a stray “const False = True; True = not False;” in someone elses sourcecode).

On green bits and red bits (which I highly associate with the “green wobbly bit”:


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