Summary of Changes

Hello @waruqi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refactors and improves the way header files are identified within the GCC toolchain module. By introducing a dedicated helper function and expanding the list of recognized header extensions, it ensures more robust and comprehensive support for precompiled header (PCH) processing across a wider variety of source file types. This change enhances the build system's flexibility and maintainability.

Highlights

• Expanded Header File Recognition: The logic for identifying header files has been enhanced to include a broader range of extensions, specifically .ipp, .tcc, .tpl, and .inc, in addition to the previously recognized .h and .inl.
• Centralized Header Check Logic: A new helper function, _is_header_file, has been introduced to encapsulate and centralize the logic for determining if a given file extension corresponds to a header file.
• Improved Efficiency with Hashset: The core.base.hashset module is now imported and utilized within the _is_header_file function to efficiently store and check for various header extensions.

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Thanks :D Would that be convenient to add that project as test as I did in my PR?

Thanks :D Would that be convenient to add that project as test as I did in my PR?

I don't think it's necessary to add a separate test project. We can add multiple targets to the existing pch test example to test different extensions.