[Bug c++/62181] [C/C++] Expected new warning: "adding 'char' to a string does not append to the string" [-Wstring-plus-int]

[ryxi at stu dot xidian.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62181

Xi Ruoyao <ryxi at stu dot xidian.edu.cn> changed:

           What    |Removed                     |Added
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                 CC|                            |ryxi at stu dot xidian.edu.cn

--- Comment #4 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
In the recent version of clang this diagnostic was separated to two
warnings, -Wstring-plus-char and -Wstring-plus-int.

-Wstring-plus-char warns

  "adding <char type> to a string pointer does not append to the string"

where <char type> may be char, unsigned char in C/C++, and char16_t,
char32_t, wchar_t in C++ 2011 and above.

-Wstring-plus-int warns

  "adding <int type> to a string does not append to the string"

where the string is a literal and the integer is not a literal (like
Tobias showed in the description).

It's more clear to use two different options.  But the two warnings may
be reported at the same location.  It seems a little redundant.  Should
we silence one while the other has been reported?