Question

I have a std::map<std::string, myStruct>. It’s safe to return address of a myStruct entry ?
I am sure that my entry will not be removed, but other entries can be added.

Type::iterator it = m_map.find(key);

if (it != m_map.end())
{
     return &(it->second);
}

Answer 1

It is safe.
In case of std::map only iterators/references/pointers to removed elements are invalidated.

Reference:
C++03 Standard 23.1.2/8:

Only iterators and references to the erased elements are invalidated