Vim script: run an execute when mapping?

Question

So I'm not sure how to go about running some some code in my mappings, like:

nnoremap <Return> :execute "normal! if 1 echo('one') endif"<cr>

Also tried it without the 'normal' - tried different combinations with separating the commands via '\' and '|' but nothing worked - keep getting variable not defined errors.

Any idea how?

EDIT:

So here's what I'm actually doing:

" Quickly toggle between insert/normal modes
nnoremap <A-e> i
inoremap <silent><A-e> <esc>:call GoRightIfNotBOL()<cr>

" Returns 1 if the cursor is at the beginning of a line "
function! IsBOL()
    return col('.') == 1
endfu

function! GoRightIfNotBOL()
    if !IsBOL()
        execute "normal l"
    endif
endfu

So instead of calling GoRightIfNotBOL I thought I could inline its code cause really, I can't think of another location where I would be using this function, and it's pretty small.

where did you get the logo? arch + vim? does it have a blue version? — Kent
– Kent, Commented Aug 22, 2014 at 13:13
Haha, it's pretty sick I know. Found it at google images. It was originally green and white transparent on the back. Here's a blue one for you imgur.com/DjMLYuB and here's the original xyne.archlinux.ca/img/arch_linux_programming_language_logos/… — vexe
– vexe, Commented Aug 22, 2014 at 13:20

Kent · Accepted Answer · 2014-08-22 14:03:18Z

1

you are looking for <expr> mapping

read :h <expr> there you'll find examples.

If your codes were a bit long, put them in a function, and call that function in your mapping. It is more readable if you later want to do some change on it.

An example with inoremap <expr>:

inoremap <expr> <YourKeys> "<esc>".(col('.')>1?'l':'')

edited Aug 22, 2014 at 14:03

answered Aug 22, 2014 at 13:10

Kent

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9 Comments

vexe Over a year ago

Thanks. The code was actually in a function. But the code is not long so I thought making a function for it wouldn't be so necessary, don't want to clutter my vimrc with tiny functions.

Kent Over a year ago

making functions is not bad idea, no matter in vimrc or somewhere else. functions are more readable, easy to debug (compare to one-liner), reusable. However, I don't know your exact requirement, maybe your goal could be easily done with a short one-liner.

vexe Over a year ago

I'm still not sure how to do it :/ - the examples in the doc are mapping functions, not one-liners like mine. Not sure how to project my if 1 echo(..) endif to them. Could you post some code?

Kent Over a year ago

@vexe what do you want to do if you pressed <Enter> in normal mode?

vexe Over a year ago

Well It's not actually enter, it's <A-e> but I was just using Enter to quickly see if the map is working or not. Basically, I use <A-e> to quickly toggle between insert/normal modes. There's a small piece of code that I run when I exit insert mode to correctly position the caret if it was at the beginning of a line. I will add it to my question.

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