1

I would like to test in an operator-pending mapping whether the cursor is on the last position of the line. I currently have this, but it does not work:

onoremap <expr> i$ col('.') == col('$') ? ':…<CR>' : ':…<CR>'

How can I test whether the cursor is on the last position of the line?

Related to this:

  • Where can I find the documentation of these tests?
  • How can I quickly test such a condition from the command line?
2

Try this instead:

col('.') >= col('$') - 1

col('$') returns the number of the bytes in the cursor line plus one. Unless you have 'virtualedit' set, the cursor will never be in that position. (I'm using >= instead of == in case you do have 'virtualedit' set.)

I'm not 100% sure what you mean by these tests, but you can find the documentation for col() at :help col().

One way to test such a condition on the command line is to evaluate it as an expression and print out the result echo:

:echo col('.') >= col('$') - 1
| improve this answer | |
  • I am actually looking for a good tutorial about conditional tests in mappings. – Serge Stroobandt May 6 at 9:48
  • What I do not understand is how the cursor could be beyond the end of the line. Could you explain that? – Serge Stroobandt May 6 at 9:50
  • 2
    @SergeStroobandt See :help 'virtualedit' – Rich May 6 at 9:50
  • 1
    @SergeStroobandt I'm not sure if any such tutorial exists. There are so many possibilities for things you could test! Having said that, they're all listed in :help functions, so having a skim through that might be a start. – Rich May 6 at 9:52
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    @SergeStroobandt Yes, :echo (see the end of my answer). In other contexts, you might want to use :let or :call from the command line. – Rich May 6 at 10:28

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