EnTT v4.0.0 changelog preview

[skypjack]

Changelog

• config:

  • ENTT_CONSTEXPR is no longer available
  • ENTT_NOEXCEPTION renamed into ENTT_NO_EXCEPTION
  • Add ENTT_USE_STL (mainly for testing purposes)

• core:

  • entt::identity is no longer available
  • entt::popcount is no longer available
  • entt::has_single_bit is no longer available
  • entt::next_power_of_two is no longer available
  • entt::type_identity is no longer available
  • entt::to_address is no longer available
  • Added concept enum_bitmask
  • Added concept cvref_unqualified
  • Refine type_info definition to favor concepts over sfinae
  • Invoking as_ref on an empty any returns and empty any

• entity

  • View-to-view conversion support for all view types
  • Added concept entt_like
  • Refine component_traits definition to favor concepts over sfinae

• meta:

  • name returns an std::string_view for all meta objects
  • Added the new meta_base object
  • base() returns meta_base objects in all cases
  • Added concept meta_policy
  • Support name clashing between meta data/functions and types
  • Refine is_meta_pointer_like definition to favor concepts over sfinae
  • Copying a meta_any that wraps a non-copyable type returns an invalid meta_any
  • Added a non-const overload of meta_any::operator*
  • Pointers are no longer pointer-like types
  • meta_any supports all dereferenceable types, i.e. optionals (constness is also guaranteed)

• signal:

  • Support enqueueing the same event type in a dispatcher from listeners

• stl:

  • A brand new submodule, mainly designed for internal purposes

• tools:

  • Make davey visit meta base types
  • Conditionally include <imgui> in davey.hpp

Build system

• C++20 is now required to use EnTT
• Minimum cmake version updated to 3.28
• Minimum doxygen version updated to 1.14

Natvis support

All natvis files have been updated where necessary.

Breaking changes

• config:

  • ENTT_CONSTEXPR is no longer available, use constexpr instead
  • ENTT_NOEXCEPTION renamed into ENTT_NO_EXCEPTION

• core:

  • entt::identity is no longer available, use std::identity instead
  • entt::popcount is no longer available, use std::popcount instead
  • entt::has_single_bit is no longer available, use std::has_single_bit instead
  • entt::next_power_of_two is no longer available, use std::bit_ceil instead
  • entt::type_identity is no longer available, use std::type_identity instead
  • entt::to_address is no longer available, use std::to_address instead
  • type_info no longer matches sfinae-based specialization, use concepts instead

• entity:

  • component_traits no longer matches sfinae-based specialization, use concepts instead

• meta:

  • base() returns meta_base objects instead of meta_types
  • is_meta_pointer_like no longer matches sfinae-based specialization, use concepts instead
  • Pointers are no longer pointer-.like types, check the right trait as needed

Any other business

The entire library is now more and more C++20-ish.
All previously deprecated functions and classes have been removed.
The clang-format configuration has been updated to match with the coding style.
The documentation is up-to-date and the library is battle-tested with 100% coverage as usual.