CLion能否借助插件实现垂直拆分编辑器自动打开相关符号？

Absolutely! This is a super common workflow for C++ developers, and most modern IDEs/editors support this—either natively or via lightweight plugins. Let me walk you through how to set this up for the two most popular tools:

VS Code #

1. Install core extensions first: Make sure you have the Microsoft C/C++ Extension Pack installed—it provides the base C++ language support needed for file association logic.
2. Add the auto-open plugin: Install the Auto Open Related File extension from the marketplace. It’s designed specifically to handle this exact use case.
3. Configure the plugin to match your needs:
   • Open Settings (Ctrl+, on Windows/Linux, Cmd+, on Mac), search for Auto Open Related File.
   • Set Auto Open Related File: Split Direction to right (this ensures the related file opens in a vertical split adjacent to your current editor).
   • Verify Auto Open Related File: Enabled is checked.
   • The plugin comes with default mappings for common C++ file pairs (.cpp ↔ .h ↔ .hpp), but if you use custom suffixes, you can add them in Auto Open Related File: File Mapping (e.g., {"cxx": ["hxx"], "hxx": ["cxx"]}).

Once set up, opening any .cpp file will automatically trigger a vertical split and load its corresponding header file (and vice versa) without you needing to manually use the Navigate -> Related Symbol command.

JetBrains IDEs (CLion, IntelliJ C++, etc.) #

These IDEs have this functionality built-in—no plugins required:

1. Open Settings (Ctrl+Alt+S on Windows/Linux, Cmd+, on Mac).
2. Search for Editor Tabs, then find the Open related files in split option and check it.
3. Set the Split direction dropdown to Right to get the vertical split layout you want.
4. Double-check file associations (usually already configured by default): Search for File Types, then confirm C++ Source Files and C++ Header Files are linked correctly.

From now on, every time you open a C++ source or header file, its counterpart will automatically open in a vertical split next to it.

For Vim/Neovim users #

You can achieve this with the vim-fswitch plugin. Add an autocmd to your .vimrc or init.lua to trigger a vertical split and open the related file whenever you open a C++ file:

autocmd BufReadPost *.cpp,*.h,*.hpp call fswitch#SwitchWithSplit('v')

内容的提问来源于stack exchange，提问作者Anton Krug