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#include <cctype>
#include <iostream>
using namespace std;
struct Fails
{
int d_int = 0;
double d_double = 0;
int (*d_is)(int) = isalnum;
private:
int d_private;
};
struct Data
{
int d_int = 0;
double d_double = 0;
int (*d_is)(int) = isalnum;
};
int main()
{
Fails fails;
// auto &[i, d, fun, priv] = fails; // won't compile: d_private
// is inaccessible
// auto &[i, d, fun] = fails; // won't compile: not all of Fails's
// members are used
Data data;
auto &[i, d, fun] = data; // OK
// d_int modified through ++i
cout << ++i << ' ' << data.d_int << ' ' <<
fun('a') << ' ' << fun(',') << '\n';
}
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