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### 3696. "Basic integral types" should not be used

Section: 31.2.2 [stream.types] Status: New Submitter: Jiang An Opened: 2022-05-07 Last modified: 2022-05-17

Priority: 3

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Discussion:

Raised from editorial issue #5240.

The phrase "signed basic integral types" in 31.2.2 [stream.types] has been present since C++98 but never defined. It is unclear whether "basic integral types" are "standard integer types" or "integer types" (including extended integer types).

As `std::streamoff` should be wide enough to represent the largest possible file size, and `std::uintmax_t` is used as the return type of `std::filesystem::file_size`, we should not disallow `std::streamoff` to be an extended integer type which may be wider than `long long`. On the other hand, as `std::size_t` and `std::ptrdiff_t` have already been allowed to be extended integer types, `std::streamsize` should also be allowed to be an extended integer type for consistency.

So I think we should just use "signed integer types" instead of "signed basic integral types" in 31.2.2 [stream.types].

[2022-05-17; Reflector poll]

Set priority to 3 after reflector poll.

Proposed resolution: