metabuilder/dbal/cpp/docs/IMPLEMENTATION_STATUS.md

C++ Implementation Status

Current State: Infrastructure Only

The C++ DBAL implementation is currently in the planning phase. The following infrastructure has been set up:

✅ Available

• Build System: CMakeLists.txt with Conan + Ninja support
• Build Assistant: dbal/tools/cpp-build-assistant.js for build automation
• CI/CD: GitHub Actions workflow (cpp-build.yml) with conditional execution
• Project Structure: Directory layout and header files
• Documentation: Comprehensive README.md with architecture plans

❌ Not Yet Implemented

• Source Files: No .cpp implementation files exist yet
• Core Library: Client, error handling, capabilities
• Query Engine: AST, query builder, normalizer
• Database Adapters: SQLite, MongoDB adapters
• Daemon: Server, security implementation
• Tests: Unit, integration, and conformance tests
• Utilities: UUID generation, backoff strategies

Why CI is Skipped

The GitHub Actions workflow includes a check-implementation job that:

1. Checks if dbal/cpp/src/ directory exists
2. Verifies at least one .cpp file is present
3. Sets has_sources=false if implementation is missing
4. Skips all build/test jobs when sources don't exist

This prevents CI failures while the C++ codebase is under development.

Implementation Roadmap

Phase 1: Core Types & Errors (Not Started)

• src/errors.cpp - Error handling and Result type
• src/types.cpp - Basic type system
• src/capabilities.cpp - Capability detection

Phase 2: Query Builder (Not Started)

• src/query/ast.cpp - Abstract syntax tree
• src/query/builder.cpp - Query construction
• src/query/normalize.cpp - Query normalization

Phase 3: Client (Not Started)

• src/client.cpp - Main client interface
• src/util/uuid.cpp - UUID generation
• src/util/backoff.cpp - Retry logic

Phase 4: Adapters (Not Started)

• src/adapters/sqlite/sqlite_adapter.cpp
• src/adapters/sqlite/sqlite_pool.cpp

Phase 5: Daemon (Not Started)

• src/daemon/main.cpp - Entry point
• src/daemon/server.cpp - Server implementation
• src/daemon/security.cpp - Security/ACL

Phase 6: Testing (Not Started)

• tests/unit/ - Unit tests
• tests/integration/ - Integration tests
• tests/conformance/ - Conformance tests

How to Start Implementation

When you're ready to implement the C++ codebase:

1. Create the src directory:

   mkdir -p dbal/cpp/src/{query,util,adapters/sqlite,daemon}
   

2. Create a minimal main.cpp to test the build:

   cat > dbal/cpp/src/daemon/main.cpp << 'EOF'
   

#include int main() { std::cout << "DBAL Daemon v0.1.0" << std::endl; return 0; } EOF

3. **Add stub implementations** for files referenced in CMakeLists.txt

4. **Test the build locally**:
```bash
npm run cpp:check
npm run cpp:full

5. Commit and push - CI will now detect sources and run builds

Why This Approach?

Benefits of conditional CI:

• ✅ No false-negative CI failures during development
• ✅ Infrastructure is tested and ready when implementation begins
• ✅ Clear signal when implementation starts (CI will activate)
• ✅ Documentation and plans can be refined without CI noise

Alternative approaches considered:

• ❌ Disable workflow entirely - hides important infrastructure
• ❌ Create stub implementations - creates technical debt
• ❌ Mark as continue-on-error - hides real build failures

Questions?

If you're working on the C++ implementation:

• Check dbal/cpp/README.md for architecture details
• Review dbal/cpp/CMakeLists.txt for build configuration
• Use dbal/tools/cpp-build-assistant.js for build commands
• See .github/workflows/cpp-build.yml for CI details

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Last Updated: 2025-12-24
Status: Infrastructure Ready, Implementation Pending