Using Token Sequences to Iterate Ranges

a year ago

The article discusses inefficiencies in C++ Ranges, particularly with views like filter and take_while, which perform redundant operations.
It presents two solutions: Flux, a library offering internal iteration for better performance, and a theoretical approach using token sequences for code injection.
Flux demonstrates how internal iteration can reduce overhead by avoiding redundant checks and optimizing space usage.
The token sequences approach, still in design, allows for generating optimal loop structures dynamically, showcasing potential for zero-overhead abstractions.
Examples highlight performance issues with common range operations and how alternative approaches can mitigate them.
The article concludes by pondering future directions for C++ Ranges, including potential language and library enhancements for internal iteration.

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