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August 29, 2015 13:56
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Wondering if there's a better way to set a value conditionally using C pre-processor macros.
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| // Is there a better way to do this?: | |
| static int someIntegerValue = | |
| #ifdef SOME_MACRO | |
| 4 | |
| #else | |
| 2 | |
| #endif | |
| ; | |
| // Or even this?: | |
| #ifdef SOME_MACRO | |
| static int someIntegerValue = 4; | |
| #else | |
| static int someIntegerValue = 2; | |
| #endif |
That would get resolved after the pre-processor, right?
Perhaps I could make another macro to handle this, but even that's not a great solution.
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Not saying it's really any better, but:
static int someIntegerValue = (4 * !!SOME_MACRO) || 2;In this case,
SOME_MACROhas to be defined, I don't think it works if it's undefined completely.