[willwinger]

I understand but in this case we have the lifetime as s, seed as S and copy as A. And you can see how it creates that extra effort for someone who is seeing it for the first time. For me any code is associated with its application and that application should be evident in the code.

We talk a lot about user experience and usability in our end products but we do not extend that thought to our fellow programmers at code level.

[SAI_Peregrinus]

I don't mind single-letter names, but I dislike having the same letter used with different case for two different names. In this example I'd probably have a lifetime 'l, a seed S, and a copy C. That way there's no "s" vs "capital s" confusion when saying what the names are.