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+--- Thread: A3-9-1 exception for using "unsigned char" for storage? (/showthread.php?tid=1662)
A3-9-1 exception for using "unsigned char" for storage? - cgpzs - 30-10-2023
A3-9-1 forbids the use of char (and a recent question clarifies that it's intended for signed/unsigned char).
However, how can we create storage in that case, since we don't have std::byte until C++17? We could use `std::uint8_t`, but that's not the type that is used in the Standard, and could potentially not be identical to "unsigned char" depending on platform.
Example use case:
Code:
alignas(T) unsigned char data[sizeof(T)];
T* p = new (data) T();RE: A3-9-1 exception for using "unsigned char" for storage? - misra cpp - 06-11-2023
We agree that unsigned char is the correct type to use in this situation (in the absence of std::byte).
This is will reviewed in a future version of the standard.
RE: A3-9-1 exception for using "unsigned char" for storage? - cgpzs - 09-11-2023
Thank you for the quick response!