EnTT Files

Changelog

• config:
• ENTT_NO_MIXIN to disable the sigh mixin by default

• Print assertion messages upon failure

• core:

• Avoid uninitialized length in all (corner) cases
• Export more types as forward declarations (see fwd.hpp)
• Lambda support for nth_argument
• Class level new/delete support for any
• Class level new/delete support for uninitialized_construct_using_allocator
• Make the monostate return *this from operator=
• Enable enable_borrowed_range/enable_view for a few types
• Make popcount public (waiting for C++20)
• Rename is_power_of_two to has_single_bit (waiting for C++20)
• Introduce bit.hpp and move a few functions there (ie has_single_bit)

• Self assignment support for basic_any<...>

• entity:

• Avoid unchecked refresh loops on single type views
• Refine empty registry check in the snapshot loader constructor
• Stop groups from swapping observed types in their pools
• Make sparse set sort_as function return an iterator past the last shared element
• Update registry destroy function to use sparse set sort_as internally
• Add operator bool to runtime views
• Assert when emplacing invalid entities through a registry
• Improved registry valid function
• Decouple size and next identifier in the storage entity
• Faster and memory-friendly storage entity create-with-hint function
• Update the tombstone class to support zero-sized versions
• Update entity traits the fully support zero-sized versions
• Return the correct value from sparse set push functions
• Drop sparse set scoped iterators (ie begin(N)/end(N))
• Add element_type to the storage class as opposed to value_type
• Make registry traits_type type member private
• Make sparse set traits_type type member private
• Make storage traits_type type member private
• Avoid using weak ranges twice in the sigh_mixin class
• Support comparisons between basic_handle<...> and null_t
• Reliable valid function for empty basic_handle<...>s
• Add pointer stable types support to the snapshot loader class
• Branch-less sparse set sort and sort_as functions
• Branch-less centralized swap-only mode check for views
• Refine storage log messages to avoid ambiguity
• Introduce the new basic_table and table classes
• In/Out edges support for basic_organizer
• Single type view ::operator-> to get access to the underlying storage
• All registry now assert on custom user defined entity storage
• Add storage_policy constexpr member to all storage classes
• Enable enable_borrowed_range/enable_view for a few types
• Decouple all types except basic_storage from component_traits
• Drop the Mask parameter of the basic_observer class
• View specialization and improvements for swap-only storage
• View specialization and improvements for swap-and-pop storage
• View specialization and improvements for in-place storage
• Avoid checking for filter validity when iterating views
• Allow resetting a storage in the registry via the reset function
• sigh_mixin automatic signal registration support for components
• Generic bind function in the basic_sparse_set class
• Reactive mixin and storage (designed to replace the observer class)
• operator bool and registry functions for sigh_mixin

• sigh_mixin transparent support to derived registries

• graph:

• Add an empty method to the flow class

• Add an empty method to the adjacency_matrix class

• meta:

• Add is_pointer meta traits
• Updated meta type is_pointer function to make it faster and more reliable
• User defined traits for meta objects
• Self assignment support for meta_any
• User defined arbitrary data support for meta types, meta data and meta functions
• Guaranteed execution/iteration order on overlaoded meta functions
• Support for creating different meta types from different factories concurrently
• Support noexcept functions whenever a free or member function is allowed

• Improve lookup time of member objects and reduce their compile-time cost

• poly:

• Improve support for inherited concepts

• resource:

• Add reset functions to resource class

• Support swap-ping resources

• signal:

• Support for free and member noexcept functions to the delegate class

Build system

• Avoid installing include/BUILD.bazel
• Updated IWYU version

Any other business

• Removed all previously deprecated methods
• Shared types in the test suite to avoid duplication
• Full review to reduce NOLINT directives as much as possible
• Refine linter configuration and address as many warnings as possible
• Updated IWYU entt.imp as needed
• Drop support to Android NDK r17
• Drop support to MSVC toolset v141

Natvis support

All natvis files have been updated where necessary. New entries:

• Natvis view for basic_handle class
• Natvis view for meta_ctx class
• Natvis view for meta_type_descriptor class
• Natvis view for meta_custom_node class

Breaking changes

• Sparse set scoped iterators are no longer a thing, check the deletion policy and use the free list value as needed instead
• Registry traits_type is private, use entt_traits class and entity_type type member instead
• Sparse set traits_type is private, use entt_traits class and entity_type type member instead
• Storage traits_type is private, use component_traits class and value_type type member instead
• The basic_observer class doesn't accept anymore a Mask template parameter
• Renamed is_power_of_two to has_single_bit and moved it to bit.hpp
• Removed support to empty each callbacks for single non-empty type views
• Deprecate meta properties, use the new custom data support for meta types, data and functions instead
• basic_sparse_set doesn't require anymore to wrap objects with anys when passing them to bind
• The observer class is now deprecated, use the reactive mixin and storage instead

Any other business

The documentation is up-to-date and the library is battle-tested with 100% coverage as usual. I started a long term process to reduce the number of instantiations and also speed up the compilation. This release contains some changes in this regard. Still a work in progress though.