C++26 introduces two key improvements to std::span: P2447R6 enables span<const T> to be constructed directly from initializer lists like {1, 2, 3}, eliminating the need for double braces. P2821R5 adds a bounds-checked span.at() method similar to other standard containers. These changes improve ergonomics and safety while maintaining backward compatibility.
Background
std::span was introduced in C++20 as a non-owning view over contiguous sequences, providing safer alternatives to C-style arrays. C++23 expanded span functionality with utilities like mdspan for multidimensional arrays.
- Source
- Lobsters
- Published
- Mar 18, 2026 at 05:04 PM
- Score
- 5.0 / 10