22 Containers library [containers]

22.3 Sequence containers [sequences]

22.3.10 Class template list [list]

22.3.10.3 Capacity [list.capacity]

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void resize(size_type sz);
1
#
Preconditions: T is Cpp17DefaultInsertable into *this.
2
#
Effects: If size() < sz, appends sz - size() default-inserted elements to the sequence.
If sz <= size(), equivalent to:
list<T>::iterator it = begin();
advance(it, sz);
erase(it, end());
🔗
void resize(size_type sz, const T& c);
3
#
Preconditions: T is Cpp17CopyInsertable into *this.
4
#
Effects: As if by: 
if (sz > size())
  insert(end(), sz-size(), c);
else if (sz < size()) {
  iterator i = begin();
  advance(i, sz);
  erase(i, end());
}
else
  ;                 // do nothing