How to join or concat ranges, C++26
10 hours ago
- #Programming
- #C++
- #Ranges
- Modern C++ enhances range manipulation with new adaptors like `std::ranges::concat_view`, `std::ranges::join_view`, and `std::ranges::join_with_view`.
- `std::ranges::concat_view` (C++26) concatenates multiple independent ranges into one sequence, preserving structure and supporting random access if all ranges do.
- `std::ranges::join_view` (C++20) flattens a single range of ranges into a single sequence, removing nested boundaries without random access support.
- `std::ranges::join_with_view` (C++23) flattens a range of ranges while inserting a delimiter between sub-ranges, useful for formatting strings.
- Examples demonstrate practical uses, such as combining reversed vectors, filtering transactions, and formatting strings with separators.
- Comparison table highlights key differences: `concat_view` for independent ranges, `join_view` for flattening, and `join_with_view` for delimited flattening.
- Encourages reader engagement by asking about their range usage and favorite views/algorithms.