Subject:
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Re: Design by Contract (long post)
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Thu, 8 Jan 2004 16:57:55 GMT
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Viewed:
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3239 times
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In lugnet.robotics.rcx, Ross Crawford wrote:
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#ifdef NDEBUG
#define assert(x) ((void)0)
#else
#define assert(x) if (x) {} else { assert_fail(); }
#endif
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I have a question about this: If NDEBUG is defined, shouldn’t it still
execute x? That is, shouldn’t the code in assert.h (or wherever) be:
#ifdef NDEBUG
#define assert(x) (x)
#else
#define assert(x) if (x) {} else { assert_fail(); }
#endif
ROSCO
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I agree it seems to be the wrong way round. That’s the standard implementation.
NDEBUG seems to stand for “No debug”. One advantage of making it negative, is
that you get the assert()s if you don’t do anything (ie dont define NDEBUG).
BTW, this thread should of course have been in the BrickOS group. Noob mistake
:)
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Message is in Reply To:
 | | Re: Design by Contract (long post)
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| (...) Hi Iain! (...) Cool! (...) I have a question about this: If NDEBUG is defined, shouldn't it still execute x? That is, shouldn't the code in assert.h (or wherever) be: #ifdef NDEBUG #define assert(x) (x) #else #define assert(x) if (x) else (...) (21 years ago, 8-Jan-04, to lugnet.robotics.rcx, FTX)
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