CUDA File Formatting

[mahyarmirrashed]

Bug type: Language Service

Describe the bug

• OS and Version: Fedora Linux 35 (KDE Plasma) x86_64
• VS Code Version: 1.67.2
• C/C++ Extension Version: 1.10.3
• Other extensions you installed (and if the issue persists after disabling them): None
• If using SSH remote, specify OS of remote machine: N/A
• A clear and concise description of what the bug is, including information about the workspace (i.e. is the workspace a single project or multiple projects, size of the project, etc).

Clang format works for .c and .h files (as far as I have tested). For each of those, I added the following items in my settings.json:

"[c]": {
  "editor.defaultFormatter": "ms-vscode.cpptools"
},
"[h]": {
  "editor.defaultFormatter": "ms-vscode.cpptools"
}

However, when I add something similar for .cuh files, it does not format them. From what I have gathered online, clang-format should support CUDA files: https://github.com/dense-analysis/ale/issues/2318

Steps to reproduce

Use the following clang-format settings in your settings.json:

"C_Cpp.clang_format_fallbackStyle": "{ BasedOnStyle: Chromium, UseTab: Never, PointerAlignment: Right, ContinuationIndentWidth: 2, AlignConsecutiveMacros: true, AlignAfterOpenBracket: BlockIndent }",

Also, make sure you have the format on save option enabled too: "editor.formatOnSave": true,

After create a tmp.cuh file with the following contents (exactly):

static   const uint32_t H[8] = {
  0x6a09e667, 0xbb67ae85,   0x3c6ef372, 0xa54ff53a,
  0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,};

Finally, press CTRL/CMD+S to save the file.

Expected behavior

With the settings above, on save, it should format the file to look like this:

static const uint32_t H[8] = {
  0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
  0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,
};

You can try renaming the file to tmp.h and see that it does indeed format.

[sean-mcmanus]

I'm not reproing the bug. What is your C_Cpp.formatting setting? When you set C_Cpp.loggingLevel to "Debug" does the "C/C++" logging show clangFormat or vcFormat being used? I do repro the issue with vcFormat (not sure if that's expected or not).

[mahyarmirrashed]

@sean-mcmanus I do not have a C_Cpp.formatting setting in my settings.json (i.e. default). However, even when I set it to clangFormat and save the file (format on auto save), it does not format it at all. Where do I see the debug logs?

[sean-mcmanus]

This is what I'm seeing:

[mahyarmirrashed]

Sorry for the late reply. I can't seem to replicate. The CTRL+S shortcut doesn't seem to work for me. However, right-clicking and selecting Format Document With... → C/C++ seems to work.

[bcaddy]

I'm having this same issue. All my .h, .cpp, and .c files format fine but no matter what I do my .cu files won't format

[bcaddy]

Disabling all CUDA extensions seems to have done it.

[LukeLIN-web]

Disabling all CUDA extensions seems to have done it.

It seems not a good solution. I wonder whether now we have a good cuda formatter.