useful but NOT fully tested cpp macros & data structures. You should only use it in your toy project
Noted that all included files have been omitted in following examples.
macro implemention for golang-flavored defer keyword
Example:
std::ofstream f1("test.txt");
int a = 8;
DEFER({
std::cout << "defer called, " << "value of variable a(int) is : " << a << std::endl;
f1.close();
});
f1 << "hello defer" << std::endl;
a++;
return 0;