EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 12·5 min read
C++26: std::indirect
TL;DR
C++26 introduces std::indirect, a class template that provides value-like semantics for dynamically allocated objects, ensuring constness propagates to owned objects. This enhances type safety and usability in polymorphic scenarios.
✦ Why It Matters
Consider using std::indirect in your C++ projects to improve type safety and constness management.
Key Takeaways
- Use std::indirect for value semantics in dynamically allocated objects.
- Eliminate boilerplate code by leveraging compiler-generated special member functions.
- Ensure const correctness to prevent unintended mutations in your classes.
- Adopt std::indirect for PIMPL, recursive types, and large member management.
How It Works
std::indirect<T> manages a heap-allocated object of type T, providing deep copies and const propagation. When accessed through a const reference, it ensures that any attempt to modify the object results in a compile-time error, thus maintaining const correctness.
This design allows for seamless integration into value-type classes, making it easier to manage complex data structures.