The WARNING macro takes one argument: text to display as a warning. The yodl program makes sure that before showing the text, the current file and line number are printed. Other than this, WARNING works just as TYPEOUT (see section ??). Note that an analogous macro ERROR exists, which prints a message and then terminates the program (see section ??).
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Copyright (c) 1997, 1998, 1999 Karel Kubat and Jan Nieuwenhuizen.

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