included file <bits/stl_set.h> emit error

[iaIm14]

Hi, I'm working on my Linux Fedora 36 machine, and I installed gcc-c++ (using dnf install gcc-c++-12.2.1-4.fc36.x86_64) to compile my program. I'm using Visual Studio Code with the llvm-vs-code-extensions.vscode-clangd extension, and I added -I/usr/include/c++/12 to the user configuration file of the clangd extension. However, when I include the file <bits/stl_set.h> (absolute path = /usr/include/c++/12/bits/stl_set.h), clangd reports unexpected errors from the header file. Specifically, the error looks like:

In included file: no template named 'less' in namespace 'std' in line 92 

the header file's content:

  template<typename _Key, typename _Compare = std::less<_Key>,
	   typename _Alloc = std::allocator<_Key> >
    class set ...

System information

Output of clangd --version:
clangd version 15.0.6 (https://github.com/llvm/llvm-project 088f33605d8a61ff519c580a71b1dd57d16a03f8)
Features: linux+grpc
Platform: x86_64-unknown-linux-gnu
Editor/LSP plugin:
VSCode + clangd
Operating system:
Linux fedora 6.2.10-100.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Apr 6 23:20:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

[zyn0217]

However, when I include the file <bits/stl_set.h> (absolute path = /usr/include/c++/12/bits/stl_set.h)

Sorry but why would you consider including an internal header of libstdc++?

[iaIm14]

However, when I include the file <bits/stl_set.h> (absolute path = /usr/include/c++/12/bits/stl_set.h)

Sorry but why would you consider including an internal header of libstdc++?

Thank you for bringing that to my attention, it seems that we shouldn't include this header file directly, but I came to this location by following the error reported by the clangd extension when reviewing my project code. However, after reinstalling gcc, it is now working properly. Perhaps I accidentally reformatted a system header file before🥲. Sorry for the trouble.