C_Cpp.codeAnalysis.exclude doesn't seem to work

[Tim Hutt]

Environment

• OS and Version: RHEL 8
• VS Code Version: 1.88.1
• C/C++ Extension Version: 1.20.5
• If using SSH remote, specify OS of remote machine:

Bug Summary and Steps to Reproduce

Bug Summary:

C_Cpp.codeAnalysis.exclude claims to exclude files from intellisense. I need this because I have a few 100k line generated C files in my project and every time I open them cpptools gets stuck at 100% forever and I have to kill it.

However, this setting doesn't seem to do anything.

Steps to reproduce:

1. Create .vscode/settings.json containing

{
    "C_Cpp.codeAnalysis.exclude": {
        "${projectRoot}/foo.c": true
    }
}

2. Create foo.c containing:

int foo() {
    return sdfsdf;
}

int main() {
    foo();
}

3. Reload the window to be sure.
4. Hover sdfsdf, ctrl-click foo();. It all still works. Clearly it is analysing the file.

Expected behavior:

I guess syntax highlighting should still work but no errors should be highlighted and go-to-definition shouldn't work.

Configuration and Logs

No `c_cpp_properties.json`. 


-------- Diagnostics - 19/06/2024, 12:34:58
Version: 1.20.5
Current Configuration:
{
    "name": "Linux",
    "includePath": [
        "/home/me/d11/**",
        "/home/me/local/vcpkg/installed/x64-linux/include"
    ],
    "defines": [],
    "cStandard": "c17",
    "cppStandard": "c++14",
    "intelliSenseMode": "linux-clang-x64",
    "intelliSenseModeIsExplicit": false,
    "cStandardIsExplicit": false,
    "cppStandardIsExplicit": false,
    "mergeConfigurations": false,
    "compilerPath": "/usr/bin/g++",
    "compilerPathIsExplicit": true,
    "browse": {
        "path": [
            "/home/me/d11/**",
            "/home/me/local/vcpkg/installed/x64-linux/include",
            "${workspaceFolder}"
        ],
        "limitSymbolsToIncludedHeaders": true
    }
}
cpptools version (native): 1.20.5.0
Translation Unit Mappings:
[ /home/me/d11/foo.c - source TU]:
Translation Unit Configurations:
[ /home/me/d11/foo.c ]:
    Process ID: 3048040
    Memory Usage: 15 MB
    Compiler Path: /usr/bin/g++
    Includes:
        /home/me/local/vcpkg/installed/x64-linux/include
        /usr/lib/gcc/x86_64-redhat-linux/8/include
        /usr/local/include
        /usr/include
    Standard Version: c17
    IntelliSense Mode: linux-gcc-x64
    Other Flags:
        --gcc
        --gnu_version=80500
Total Memory Usage: 15 MB

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 4929

### Other Extensions

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### Additional context

_No response_