How to automatically move trailing comments to the line above?

Question

I am looking for a tool, option, or regex to move trailing comments to above the line they describe. In other words I would like to turn this:

a = b; // Assign b to a

into this:

// Assign b to a
a = b;

I am currently using uncrustify to clean up a large code base, but it doesn't look like it has an option for this, nor could I find it in other tools, though I may have missed it somewhere. The code makes a lot of use of trailing comments, and for the most part they are randomly spaced and badly aligned.

I'm sure a regular expression would do it, did you try it already? — Oscar David Arbeláez, Nov 23 '15 at 18:34
This question is off topic because: "Questions asking us to recommend or find a book, **tool**, software library, tutorial or other off-site resource are off-topic for Stack Overflow". — Algirdas Preidžius, Nov 23 '15 at 18:36
This is only for `//` comments? How about trailing `/* .. */` comments? — ramana_k, Nov 23 '15 at 19:01
be aware that your transformation can break compilation, e.g. in macro definitions — robal, Nov 23 '15 at 19:45

score 1 · Answer 1 · answered Nov 23 '15 at 18:49

1

Try the following regex in Vim:

s:^\(.*\)\s\+\(//.*\):\2\r\1:

answered Nov 23 '15 at 18:49

Alex

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How to automatically move trailing comments to the line above?

1 Answers1