#include <iostream> using namespace std; #define CHECK_NOTNULL(val) \ CheckNotNull(__FILE__, __LINE__, "'" #val "' Must be non NULL", (val)) template <typename T> T* CheckNotNull(const char* file, int line, const char *names, T* ptr) { if (ptr == NULL) { cout << names << endl; } return ptr; } int main(){ int *p=NULL; int *q=CHECK_NOTNULL(p); CHECK_NOTNULL(q); return 0; }
CHECK_NOTNULL template
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