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cppcoreguidelines-avoid-reference-coroutine-parameters¶

Warns when a coroutine accepts reference parameters. After a coroutine suspend point, references could be dangling and no longer valid. Instead, pass parameters as values.

Examples:

std::future someCoroutine(int& val) { co_await ...; // When the coroutine is resumed, 'val' might no longer be valid. if (val) ... }

This check implements CP.53from the C++ Core Guidelines.