std::optional specialization for reference types

by

When n3406 (revision #2 of the proposal) was discussed, some committee members were uncomfortable with optional references. In n3527 (revision #3), the authors decided to make optional references an auxiliary proposal, to increase the chances of getting optional values approved and put into what became C++14. While optional didn’t quite make it into C++14 for various other reasons, the committee did not reject optional references and is free to add optional references in the future should someone propose it.

More Related Contents:

  1. push_back vs emplace_back
  2. Is std::unique_ptr required to know the full definition of T?
  3. Why can I not push_back a unique_ptr into a vector?
  4. Why do I get the same sequence for every run with std::random_device with mingw gcc4.8.1?
  5. Why can’t simple initialize (with braces) 2D std::array? [duplicate]
  6. Nice way to append a vector to itself
  7. Is the size of std::array defined by standard
  8. Why is the C++ initializer_list behavior for std::vector and std::array different?
  9. Why is template argument deduction disabled with std::forward?
  10. Why use non-member begin and end functions in C++11?
  11. std::map emplace without copying value
  12. std::vector, default construction, C++11 and breaking changes
  13. Why is value taking setter member functions not recommended in Herb Sutter’s CppCon 2014 talk (Back to Basics: Modern C++ Style)?
  14. Non-copyable elements in vector
  15. what is the best modern c++ approach to construct and manipulate a 2d array [closed]
  16. C++11 STL containers and thread safety
  17. How can I use Standard Library (STL) classes in my dll interface or ABI?
  18. Comparing 3 modern c++ ways to convert integral values to strings
  19. Can std::vector emplace_back copy construct from an element of the vector itself?
  20. stl random distributions and portability
  21. Are lambdas inlined like functions in C++?
  22. Why vector access operators are not specified as noexcept?
  23. Why isn’t std::array::size static?
  24. error for hash function of pair of ints
  25. stl container with std::unique_ptr’s vs boost::ptr_container
  26. STL algorithms: Why no additional interface for containers (additional to iterator pairs)?
  27. const auto std::initializer_list difference between Clang and GCC
  28. C++11 std::to_string(double) – No trailing zeros
  29. C++ priority_queue with lambda comparator error
  30. Can the ‘type’ of a lambda expression be expressed?

Leave a Comment