compile time check for enums

Asked Apr 03 '17 at 13:18

Active Apr 03 '17 at 13:18

Viewed 54 times

Consider the following snippet:

enum ids {
   ID1 = 1,
   ID2 = 2,
   ID3 = 3,
};

So this list can be extended with new ID. Is there a way in the C language to provide a compile time check ensuring that these IDs do not repeat each other, i.e. the following could be caught because ID100 is equal to ID2:

enum ids {
   ID1 = 1,
   ID2 = 2,
   ID3 = 3,
   ...
   ID100 = 2
};

Thanks.

asked Apr 03 '17 at 13:18

Mark

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Note that it is expressly allowed that multiple enum constants associated with the same enum type map to the same value. – John Bollinger Apr 03 '17 at 13:25
@John Bollinger, thanks I will take a look. Isn't it the c++ only solution? – Mark Apr 03 '17 at 15:28
No. The dupe does have some answers that are C++-specific, but the accepted and highest-voted one is not among those. – John Bollinger Apr 03 '17 at 15:50

compile time check for enums

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