ZIm/docs/src/languages/c.md

C

C support is available natively in Zed.

• Tree Sitter: tree-sitter/tree-sitter-c
• Language Server: clangd/clangd

Clangd: Force detect as C

Clangd out of the box assumes mixed C++/C projects. If you have a C-only project you may wish to instruct clangd to all files as C using the -xc flag. To do this, create a .clangd file in the root of your project with the following:

CompileFlags:
  Add: [-xc]

Formatting

By default Zed will use the clangd language server for formatting C code. The Clangd is the same as the clang-format CLI tool. To configure this you can add a .clang-format file. For example:

---
BasedOnStyle: GNU
IndentWidth: 2
---

See Clang-Format Style Options for a complete list of options.

You can trigger formatting via {#kb editor::Format} or the editor: format action from the command palette or by adding format_on_save to your Zed settings:

  "languages": {
    "C" {
      "format_on_save": "on",
      "tab_size": 2
    }
  }

See Clang-Format Style Options for a complete list of options.