The tools at Google are perfectly capable of diffing lines of arbitrary width. Those in charge of the C++ style guide choose not to allow them without strong j

The tools at Google are perfectly capable of diffing lines of arbitrary width. Those in charge of the C++ style guide choose not to allow them without strong justification. In practice, you just convince your reviewer and move on. Most reviewers are reasonable, but edge cases a where it is needed are rare. I don’t especially like it, but in terms of annoying style issues, it is very far down the list, especially when the tooling handles it all for you via auto formatting and whatnot.