c++ - Is it safe to delete a NULL pointer? -

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is safe delete null pointer?

and coding style?

delete performs check anyway, checking on side adds overhead , looks uglier. very practice setting pointer null after delete (helps avoiding double deletion , other similar memory corruption problems).

i'd love if delete default setting parameter null in 

#define my_delete(x) {delete x; x = null;}

(i know r , l values, wouldn't nice?)


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