I consider the leading pipe clearer, and could be sold on it, but ending each line with an inconvenient slash character (non-US layout) makes me strongly favor

I consider the leading pipe clearer, and could be sold on it, but ending each line with an inconvenient slash character (non-US layout) makes me strongly favor the trailing version. The trailing version seems more natural with operators like comma, but less natural with operators like minus, and is far clearer with semicolonless languages. I suspect if I were to go through old code, I'd find both uses, but generally I prefer trailing. The exception to this is languages like Haskell, though indentation could serve the same purpose.