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auto it;
bool was_erased;
do {
    it = list.begin();
    report(it);
    was_erased = ???;
}while(was_erased);
for(;;) {
    auto it2 = it;
    ++it2;
    if (it2 == end())
        break;
    report(it);
    was_erased = ???;
    if (was_erased == false)
        it = it2;
}
 
 

prog.cpp:1: error: ISO C++ forbids declaration of ‘it’ with no type
prog.cpp:1: error: top-level declaration of ‘it’ specifies ‘auto’
prog.cpp:3: error: expected unqualified-id before ‘do’
prog.cpp:7: error: expected unqualified-id before ‘while’
prog.cpp:8: error: expected unqualified-id before ‘for’
prog.cpp:8: error: expected unqualified-id before ‘)’ token

Standard output is empty