Question on .vimrc coding technique

I just added the following lines to my .vimrc file:

let start_comment="\\/\\*"
let any_including_nl="\\_."
let non_greedy="\\{-}"
let end_comment="\\*\\/"

let full_c_comment=start_comment . any_including_nl . non_greedy .
end_comment
nnoremap <leader>cc /^R=full_c_comment^M^M

The intent is to make some regex building blocks that are easy to read and
combine. It works fine so far. Any gotchas I should know about? Thanks.



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