Created
July 15, 2019 19:22
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A simple in-place swap macro for C
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| #define swap(a, b) do {\ | |
| typedef struct { char data[sizeof(a) == sizeof(b) ? sizeof(a) : -1]; } swap;\ | |
| swap* const aa = (swap*)&(a);\ | |
| swap* const bb = (swap*)&(b);\ | |
| swap const cc = *aa; *aa = *bb; *bb = cc;\ | |
| } while(0) |
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