RE: Last_pattern_register not updated upon indirect search

Tinou wrote:
> nnoremap <silent> * :call histadd("search",
> expand("<cword>")) <bar> let @/='\<'.expand("<cword>").'\>'
> <bar> set hlsearch<CR>

Hmmm ... now I'm confused about <expr>.

The help example makes sense:
:inoremap <expr> . InsertDot()

But is <expr> ever needed with nnoremap?

I'm wondering because in this tip:
http://vim.wikia.com/wiki/Highlight_all_search_pattern_matches

we have this method to highlight matches without moving:
:nnoremap <F8> :let @/='\<<C-R>=expand("<cword>")<CR>\>'<CR>:set hls<CR>

However, it has just been demonstrated that the <C-R>= stuff
is superfluous (I had thought it was necessary if not using
<expr>).

Here is Tinou's mapping tweaked for a little simplification:

" Highlight current word without moving cursor; update history.
:nnoremap <silent> <F8> :let @/='\<'.expand("<cword>").'\>'<Bar>set hls<Bar>call histadd("search",@/)<CR>

I guess I'll put the above in the tip.

John

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