EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Jul 29·5 min read
C++26: Reducing undefined behaviour
TL;DR
C++26 introduces significant changes to reduce undefined behavior, including making the deletion of pointers to incomplete types ill-formed and categorizing uninitialized reads as erroneous behavior. These updates enhance program safety without requiring major code rewrites.
✦ Why It Matters
Update your C++ code to comply with C++26 standards for improved safety and reliability.
Key Takeaways
- Ensure types are complete before deletion to avoid compilation errors.
- Initialize local variables to prevent erroneous behavior warnings.
- Avoid returning references to temporaries to eliminate dangling references.
- Recompile existing code with C++26 for enhanced safety features.
How It Works
C++26 introduces a clear rule that makes deleting pointers to incomplete types ill-formed, preventing undefined behavior. It also categorizes uninitialized reads as erroneous behavior, allowing compilers to diagnose issues.
The standard library hardening checks preconditions at runtime, enabling safer operations.