# Description of Changes
- Updated the Unreal SDK and generated Unreal bindings for the websocket
2.0 protocol/model
- Reworked DbConnectionBase to handle the updated message shapes
- Switched subscription handling over to new message types and
QuerySetId
- Updated reducer to ReducerResult, removal of callbacks, and set
reducer flags
- Added event table support
- Baked in multi-module support replacing [the old
PR](<https://github.com/clockworklabs/SpacetimeDB/pull/3417>)
- Added functionality to generate module support for multiple folders in
the Unreal project (add <module>.Build.cs, <module>.h, <module>.cpp)
using the --module-name
- Add new configuration option for spacetime generate to handle module
prefix
- Regenerated Unreal Blackholio/TestClient/QuickstartChat bindings
- Rebuilt Unreal Blackholio's consume entity to use event tables
- Updated migration documentation
- Updated the version bump tool to impact C++
# API and ABI breaking changes
- Unreal websocket/message handling updated to the new protocol
- Unreal generation now expects a real .uproject target and will stop
immediately if project
metadata is invalid instead of continuing past setup issues.
# Expected complexity level and risk
3 - A large set of changes to update the websocket/message handling
along with heavy codegen changes to handle multi-module support
# Testing
Test coverage of the Unreal SDK will need expansion in a future ticket
once our issues with flakiness on CI is resolved.
- [x] Updated Unreal Blackholio
- [x] Ran full Unreal SDK test suite
- [x] Built new test project using the new `--module-prefix`
- [x] Run through Unreal Blackholio (C++ and Blueprint)
- [x] Rebuilt Unreal Blackholio with multi-module, and duplicate
generated module testing side-by-side modules that would overlap
# Review Question(s)
- [x] Updates to `spacetime init` have made the tutorial a little
confusing with pathing for the Unreal Blackholio tutorial. To fix though
we'd have to update all the commands to be more explicit, or update the
tutorial `spacetime init` to use `--project-path .` to keep pathing
simpler, thoughts?
---------
Signed-off-by: Jason Larabie <jason@clockworklabs.io>
Co-authored-by: Ryan <r.ekhoff@clockworklabs.io>
# Description of Changes
- Migrated the C++ module-definition assembly path to V10-first
internals:
- Added v10_builder and module_type_registration systems.
- Switched Module::__describe_module__ to serialize RawModuleDef with
V10 payload.
- Updated macro registration pipeline to register through V10
- Added explicit naming support across macro surface (*_NAMED variants
for reducer/procedure/
view and field/index macros).
- Reworked multi-column index macros (FIELD_MultiColumnIndex,
FIELD_MultiColumnIndex_NAMED) with
migration alias.
- Added SPACETIMEDB_SETTING_CASE_CONVERSION(...) to support case
conversion policy
- Error-path hardening by adding explicit constraint-registration error
tracking and preinit validation
- Codegen updates:
- Updated C++ moduledef regen to V10 builder types.
- Adjusted C++ codegen duplicate-variant wrapper generation to emit
proper product-type
wrappers.
- Test/harness updates:
- type-isolation-test runner now defaults to focused V10 regression
checks; --v9 runs broader
legacy/full suite.
- Added focused modules for positive/negative V10 checks:
- test_multicolumn_index_valid
- error_multicolumn_missing_field
- error_default_missing_field
- Re-enabled C++ paths in sdks/rust/tests/test.rs procedure/view/test
suites.
# API and ABI breaking changes
- Refactor of the underlying module definition
- New *_NAMED variant macros for explicit canonical naming
- FIELD_NamedMultiColumnIndex renamed to FIELD_MultiColumnIndex
# Expected complexity level and risk
3 - Large set of changes moving over to V10 with underlying changes to
make future updates a little easier
# Testing
- [x] Ran the type isolation test and expanded it
- [x] Ran the spacetimedb-sdk test framework to confirm no more drift
between C++ and other module languages
- [x] Ran Unreal test suite though not really applicable
- [x] New app creation with `spacetime init --template basic-cpp`
- [x] Ran describe module tests against Rust + C# matching with C++ on
the /modules/sdk-test* modules to find any possible mis-alignment
# Review
- [x] Another look at the new features with C++
- [x] Thoughts on *_NAMED macros, I couldn't come up with a better
solution with C++20
# Description of Changes
This adds C++ server bindings (/crate/bindings-cpp) to allow writing C++
20 modules.
- Emscripten WASM build system integration with CMake
- Macro-based code generation (SPACETIMEDB_TABLE, SPACETIMEDB_REDUCER,
etc)
- All SpacetimeDB types supported (primitives, Timestamp, Identity,
Uuid, etc)
- Product types via SPACETIMEDB_STRUCT
- Sum types via SPACETIMEDB_ENUM
- Constraints marked with FIELD* macros
# API and ABI breaking changes
None
# Expected complexity level and risk
2 - Doesn't heavily impact any other areas but is complex macro C++
structure to support a similar developer experience, did have a small
impact on init command
# Testing
- [x] modules/module-test-cpp - heavily tested every reducer
- [x] modules/benchmarks-cpp - tested through the standalone (~6x faster
than C#, ~6x slower than Rust)
- [x] modules/sdk-test-cpp
- [x] modules/sdk-test-procedure-cpp
- [x] modules/sdk-test-view-cpp
- [x] Wrote several test modules myself
- [x] Quickstart smoketest [Currently in progress]
- [ ] Write Blackholio C++ server module
---------
Signed-off-by: Jason Larabie <jason@clockworklabs.io>
Co-authored-by: clockwork-labs-bot <clockwork-labs-bot@users.noreply.github.com>
Co-authored-by: Ryan <r.ekhoff@clockworklabs.io>
Co-authored-by: John Detter <4099508+jdetter@users.noreply.github.com>
