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A decision guide for choosing read-only text parameter types in C++17: compare string_view, const string&, and const char* with a compact trade-off table, concrete example, and validation steps to verify zero allocations and detect dangling views.
Passing const std::string& to read-only functions forces heap allocations from const char* callers. std::string_view removes that cost, but its non-owning lifetime semantics demand strict discipline.
Pass read-only string parameters as std::string_view by value: what the pointer-plus-length handle buys you, where NUL termination and lifetime break it, and how to check your build.
Goal Design a function that accepts textual data while balancing zero‑copy performance with lifetime safety. The decision centers on whether to expose std::string_view for read‑only consumption or require std::string to enforce ownership. Constraints & Uncertainty Zero‑copy semantics of std::string_view avoid allocations but risk dangling references if t
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