View：Lazy、Non-owning 与 Composable | STL
本章覆盖：view；lazy evaluation；non-owning often, but not universally simple observer；lightweight range；pipeline；no immediate materialization；source lifetime；repeated traversal；side effect；view 不等于“免费 vector”；生命周期是 ranges 最大风险点之一。
本章知识点
- view
- lazy evaluation
- non-owning often, but not universally simple observer
- lightweight range
- pipeline
- no immediate materialization
- source lifetime
- repeated traversal
- side effect
- view 不等于“免费 vector”
- 生命周期是 ranges 最大风险点之一