Release Flecs v3.1.5 · SanderMertens/flecs

Highlights

A big upgrade to the reflection framework which can now serialize/deserialize custom (including STL) types!
New functions to serialize & deserialize a world to & from JSON
Improved performance of iterating queries with tag fields (+30-50%)
Improved performance of table creation in apps with lots of cached queries (+70-90%)
Improved performance of notifying multiple observers for the same event (+20-30%)

This version includes the following bugfixes:

Fix issue where symmetric relationship would be cleaned up before its observer
Fix issue in debug mode where entity generation check could use wrong index in dense array
Fix issue where on_set hook was not called before observers during command batching
Changed incorrect return type of ecs_id_is_tag to bool
Ensure destructor is called on moved away from value in command queue
Fix memory leaks when using a global flecs::world object
Ensure destructor is called on moved away from column when merging tables
Fix lambda compilation issue when using Visual Studio 2017

This version includes the following improvements:

[core] Allow for ecs_ensure to be called from stage
[core] Add Traversable property to allow for relationships that are acyclic but not traversable
[core] Only apply DontInherit property to IsA traversal
[meta] Serialization & deserialization support for opaque types
[meta] Add methods for deserializing values & entities to C++ API
[json] Add option to JSON serializer to serialize all contents of a matched table
[json] Add functions for serializing/deserializing world to/from JSON
[observers] Improve performance of invoking multiple observers for the same event
[queries] Improve detection and handling of query terms without data
[cpp] Remove redundant world argument from flecs::entity constructor in id::second()
[cpp] Add begin/end methods to flecs::type so it can be iterated
[cpp] Add entity::view method for safe upcast from staged flecs::entity object
[cpp] Automatically disable enum reflection for compilers that don't support it
[docs] Improve documentation of get_mut
[docs] Rewrite of the FAQ
[docs] Add query example for singletons, add singleton section to quickstart
[ux] Add assert when not using stage when creating iterator in multi threaded world
[internals] Use observers for notifying queries of new tables
[internals] Improve performance of ecs_bulk_init by using faster function to update entity index
[internals] Implement small utility API for parsing JSON strings

Breaking Changes:

Inconsistencies in the naming of JSON deserialization functions have been fixed (#466 (comment))
The behavior of the Acyclic property has been split up into an Acyclic and Traversable property (#466 (comment))

Known issues:
#844
#765
#714
#620
#478
#314

Full Changelog: v3.1.4...v3.1.5