| Issue |
182518
|
| Summary |
[clang-tidy] detect `errno` being compared with a number literal
|
| Labels |
clang-tidy,
check-request
|
| Assignees |
|
| Reporter |
firewave
|
The actual values of the error constants utilized by `errno` are not being document so technically that makes them implementation-defined (it is stated more than specified by the standard might be defined). So checking it against a number might not be portable.
See
https://en.cppreference.com/w/c/error/errno_macros.html
https://en.cppreference.com/w/cpp/error/errno_macros.html
https://www.man7.org/linux/man-pages/man3/errno.3.html
They are actually document as "implementation-defined" in https://en.cppreference.com/w/c/header/errno.html.
And the Visual Studio documentation provides some actual values: https://learn.microsoft.com/en-us/cpp/c-runtime-library/errno-constants.
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