sum_type

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/* tagged union for nullable types, e.g. nullable int either an int is present (tagged as SOME) or absent (tagged as NONE) */ #include <assert.h> #include <stdbool.h> #include <stddef.h> #include <stdio.h> enum tag { NONE, SOME }; struct opt { enum tag type; union { struct { int64_t item; }; struct { void* item; }; }; }; int main() { return 0; }
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