k.cpp

#include <initializer_list>
#include <utility>
#include <string>

void d(std::initializer_list<std::pair<std::string&, const char*>> dirs) {
    for (auto k : dirs) {
        k.first = k.second;
    }
}

int main(void) {
    std::string f;
    d({ std::make_pair(f, "a") });
}