E2054 Illegal type in Write/Writeln statement (Object Pascal)
This error occurs when you try to output a type in a Write or Writeln statement that is not legal.
program Produce; type TColor = (red,green,blue); var Color : TColor; begin Writeln(Color); end.
It would have been convenient to use a writeln statement to output Color, wouldn't it?
program Solve; type TColor = (red,green,blue); var Color : TColor; const ColorString : array [TColor] of string = ('red', 'green', 'blue'); begin Writeln(ColorString[Color]); end.
Unfortunately, that is not legal, and we have to do it with an auxiliary table.