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  1. {$DEFINE TEST_A}
  2. // {$DEFINE TEST_B}
  3. // {$DEFINE TEST_C}
  4.  
  5. {$IF DEFINED(TEST_A) + DEFINED(TEST_B) + DEFINED(TEST_C) <> 1}
  6. {$FATAL SORRY, MATE!}
  7. {$ENDIF}
  8.  
  9. program ideone;
  10. begin
  11. (* your code goes here *)
  12. end.
Success #stdin #stdout 0s 340KB
stdin
Standard input is empty
stdout
Standard output is empty