Chained View Pipeline

Understanding C++ view composition and lazy evaluation

This is a medium-difficulty C++ question that tests your understanding of how modern C++ range views compose and execute. It requires you to trace through a pipeline of chained view operations and predict the output, which means reasoning carefully about when and how each transformation is applied.

The question probes whether you grasp the distinction between eager and lazy evaluation in the ranges library, how views defer computation until iteration, and the order in which transformations are applied across the pipeline. Getting the answer right demands attention to detail about C++ semantics—small differences in how views chain can produce surprisingly different results.

• Range adaptor composition and chaining
• Lazy vs. eager evaluation in views
• Iterator and range type forwarding
• Side effects and evaluation order in transformation pipelines