Changes

• Removed use of sumbodules to break circular dependencies, use CMake's FetchContent instead.
• Removed generic definition of numeric_limits<>
• Removed EASTL_CUSTOM_FLOAT_CONSTANTS_REQUIRED & associated functionality
• Removed Internal::numeric_limits_base
• Added isnan to EASTL when compiled with C++20
• Added is_constant_evaluated
• Fixed midpoint to behave correctly when passed NaNs
• Add bounds checking assert for array<T, N>::operator[].
• Fixed fixed_vector move constructor with an explicit allocator parameter. It now works with move-only types.
• Add bit_and, bit_or, bit_xor, bit_not and owner_less<void> function objects.
• Use string builtins to improve codegen for string literals operations on string_view and string.
• span is now specialized for static extents so that it doesn't need to store the size at runtime.
• Fixed a bug where calling emplace, emplace_hint, or try_emplace on a string_hash_map would call the underlying hash_map implementation, which caused a crash when string_hash_map would try to free memory it didn't own.
• Consolidate implementations of CharTypeStringSearch/Find functions in char_traits.h.
• Minor optimization to CharTypeStringRSearch to reduce iteration loop count.
• Fix deque move assignment operator for move only and non-default constructible types.
• Added monadic operations and_then, transform and or_else for optional.
• Fixed value_or for r-value refs to optional.
• Various bitset fixes and improvements:
  • Replace bitset(uint32_t) with bitset(unsigned long long) which matches the standard and means that 64 bit integers can be correctly converted to a bitset. As a result from_uint32() and from_uint64() are now unnecessary (not deprecated).
  • Add to_ulong_checked() with the same behaviour as the standard, ie. throws or asserts if the target type cannot represent all the set bits.
  • Add an extension to the standard, as_uint<T>() / as_ulong(), cast to a unsigned integral that can represent the entire bitset. If the target type cannot represent the entire bitset, then issue a compile error (overload does not exist).
  • Fix implementation for word types smaller than 32 bit. Fixed logic in find_prev(), other iteration functions and conversion to/from bitset functions that did not work for such types.
  • No longer assume sizeof(word_type) == EA_PLATFORM_WORD_SIZE. eg. from_uint64() previously would not copy the entire value into a bitset<N, uint32_t> for N > 32.
  • Now compiles for a word type of unsigned long or unsigned long long where the type is not uint64_t.
  • Add an assert that the word type is an unsigned integral, as these are the only types that are supported and tested.
• Add get<T>(pair<T1, T2>). Make get<I>(pair<T1, T2>) constexpr.
• Fix variant non-member functions get_if(), get(), holds_alternative() and converting constructor and assignment so that they only conditionally compile when the index or type unambiguously refers to a variant alternative.
• any::emplace() now returns a reference.
• lru_cache::emplace() now compiles correctly, forwarding its arguments and returns an pair of iterator and bool indiciating emplace success.
• Made changes to avoid -Wdeprecated-copy-with-user-provided-copy, which manifests for the following reasons:
  • definition of implicit copy assignment operator for class is deprecated because it has a user-provided copy constructor
  • definition of implicit copy constructor for class is deprecated because it has a user-provided copy assignment operator
• Fix various issues with segmented_vector:
  • Fix copy/move construction/assignment so it doesn't do a shallow copy.
  • clear() now behaves like other eastl containers in that it does not free memory when called, the container maintains it's capacity.
  • segmented_vector now supports types which are not default constructible.
  • Added some missing API functions: reserve, resize, shrink_to_fit, emplace_back.
  • Added comparison operations.
• Add constructor overloads to map, set, hash_set, hash_map that take an initializer_list and Allocator.
• Enable some container asserts (when EASTL_ASSERT_ENABLED is enabled), removing the requirement for EASTL_EMPTY_REFERENCE_ASSERT_ENABLED. When called with invalid arguments these functions will result in undefined behaviour.
• Add some additional asserts to container adaptors.
• Fix undefined behaviour in shell_sort() algorithm.
• Add return values for deque, list, slists's member functions emplace_front(), emplace_back() and unique().
• Add slist::unique() function.
• Fix references to std library that should be eastl.
• Fix compilation issues when C4626 is enabled as error on MSVC.
• Optimize bitset's find_first(), find_next(), find_last(), find_prev() (which are extensions to the standard).
• Fix bitset<N, eastl_uint128_t>::find_last().gg
• Added erase_unordered and erase_unordered_if for vector and deque (fixed_vector works implicitly with the vector version since it is a vector with a special allocator and these functions don't affect capacity). These work similar to free function erase/erase_if but are more efficient if those would result in moving a lot of elements. They achieve this by not respecting the order of the remaining element and just moving the elements from the end into the now empty spots.
• optional::emplace now correctly returns T& instead of void as specified in the standard.
• Explicitly define special member functions for some types. This fixes new compile errors from Visual Studio 17.7.0 Preview.
• Fix function::target not compiling due to missing template parameter when we called into the base class' member function.

Deprecations:

• Use EA_DEPRECATED date based macros if available to guide deprecations.
• Deprecate vector_map<Key, T>::at(index). this function was accidentally inherited from vector with incorrect semantics.
• Deprecate make_pair_ref(), use make_pair() instead. deprecate a make_pair() overload which was only enabled on MSVC.
• Deprecate a make_pair() overload which was only enabled on MSVC.
• Deprecate stack::emplace_back(), use stack::emplace() instead.
• Deprecate uninitialized_copy_ptr et al - uninitialized_copy is already perfectly suitable for pointers.
• Deprecate unwrap_iterator, is_reverse_iterator, is_move_iterator, is_insert_iterator, generic_iterator (the last is internal and should already be unused).

PRs

• Declare C++14 as required for building by @uilianries in https://github.com/electronicarts/EASTL/pull/509
• Update EABase submodule by @mtnpke in https://github.com/electronicarts/EASTL/pull/504
• Fix ring_buffer comparation logic by @ChaiByte in https://github.com/electronicarts/EASTL/pull/514
• Add MSVC support to initializer_list by @mtnpke in https://github.com/electronicarts/EASTL/pull/503

New Contributors

• @ChaiByte made their first contribution in https://github.com/electronicarts/EASTL/pull/514