It's fine as long as you don't use tabs for visual alignment. Especially C projects tend to do this, and/or have a weird mix of tabs and spaces (e.g. indent by

It's fine as long as you don't use tabs for visual alignment. Especially C projects tend to do this, and/or have a weird mix of tabs and spaces (e.g. indent by four spaces, but all eight spaces are tabs). That's just silly. But if you just always indent by n tabs, and align with spaces for visual alignment, then it's not a problem. This is what e.g. gofmt does.