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August 29, 2015 14:05
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Method of easily selecting from multitude of exclusive compile time options.
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| //set only one of the following to 1. | |
| #define OPTION_PRIMARY 1 | |
| #define OPTION_ALTERNATE 0 | |
| #define OPTION_UNLIKELY 0 | |
| //Did you follow the rules? | |
| #if ((OPTION_PRIMARY+OPTION_ALTERNATE+OPTION_UNLIKELY)!=1) | |
| #error("Error configuring options") | |
| #endif | |
| /*...*/ | |
| #if OPTION_PRIMARY | |
| printf("primary"); | |
| #elif OPTION_SECONDARY | |
| puts("secondary"); | |
| #elif OPTION_UNLIKELY | |
| putc('U'); | |
| #endif |
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