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#include <cstring>
 
void f(const int *array, std::size_t size) noexcept {
  int *copy = new int[size];
  std::memcpy(copy, array, size * sizeof (*copy));
  // ...
  delete [] copy;
}

#include <cstring>
 
void f(const int *array, std::size_t size) noexcept {
  int *copy = new (std::nothrow) int[size];
  if (!copy) {
    // Handle error
    return;
  }
  std::memcpy(copy, array, size * sizeof (*copy));
  // ...
  delete [] copy;
}

#include <cstring>
 
void f(const int *array, std::size_t size) noexcept {
  int *copy;
  try {
    copy = new int[size];
  } catch(std::bad_alloc) {
    // Handle error
    return;
  }
  // At this point, copy has been initialized to allocated memory.
  std::memcpy(copy, array, size * sizeof (*copy));
  // ...
  delete [] copy;
}

#include <cstring>
 
void f(const int *array, std::size_t size) noexcept(false) {
  int *copy = new int[size];
  // If the allocation fails, it will throw an exception which the caller
  // will have to handle.
  std::memcpy(copy, array, size * sizeof (*copy));
  // ...
  delete [] copy;
}