Is hash_map part of the STL?

by

The STL has hash_map, but the C++ Standard Library does not.

Due to a common misconception, you may think of the C++ Standard Library as “the STL”, or of parts of your toolchain’s implementation of the C++ Standard Library as “an STL implementation”.

It is not.

It is also a great shame that both MSVC++ and GCC (which implement hash_map as a compiler-specific extension), place it in the std namespace, which is not only highly misleading, but also illegal per the standard. *sigh*

C++11 has introduced std::unordered_map, which is not dissimilar.

More Related Contents:

  1. In which scenario do I use a particular STL container?
  2. C++ sorting and keeping track of indexes
  3. What are the complexity guarantees of the standard containers?
  4. Remove spaces from std::string in C++
  5. How do I sort a std::vector by the values of a different std::vector?
  6. Why should one not derive from c++ std string class?
  7. problem sorting using member function as comparator
  8. Why can’t we declare a std::vector?
  9. Determine if a type is an STL container at compile time
  10. How to initialize std::vector from C-style array?
  11. string c_str() vs. data()
  12. std::transform() and toupper(), no matching function
  13. stl::multimap – how do i get groups of data?
  14. Case insensitive std::string.find()
  15. Does std::list::remove method call destructor of each removed element?
  16. What is the difference between const_iterator and non-const iterator in the C++ STL?
  17. How can currying be done in C++?
  18. Why don’t the std::fstream classes take a std::string?
  19. how portable is end iterator decrement?
  20. Sorting a std::vector by the string?
  21. Template class with template container
  22. Windows Unicode C++ Stream Output Failure
  23. Can raw pointers be used instead of iterators with STL algorithms for containers with linear storage?
  24. STL remove doesn’t work as expected?
  25. std::back_inserter for a std::set?
  26. Converting between C++ std::vector and C array without copying
  27. C++, can I statically initialize a std::map at compile time?
  28. “Proper” way to store binary data with C++/STL
  29. C++ template function compiles in header but not implementation
  30. Insert into an STL queue using std::copy

Leave a Comment