跳转到Vim中当前行的quickfix或位置列表中的错误（使用Syntastic）

Question

I started using the Syntastic plugin for Vim, which will run a syntax checker on the current buffer and then indicate any lines which have errors. I can open up the list of errors as as a location list using :Errors , and then jump to the line of a given error by hitting Enter , which will jump to the line containing the error in my buffer.

I want to know how I can do the opposite. I want to go from a line in my buffer that is marked with having a syntax error to the corresponding entry in the location list, so that I can read the full error message in the list. How can I do this? I know that :ll [n] will jump to the n th error in the list, but often I will not know exactly which error number corresponds to the given line in the buffer. I cannot find a command that accepts a line number, rather than an error number, however.

Answer 1

You're right, there's no built-in way to find out which error is at or after the current cursor position, though that would often be useful. I've written the QuickFixCurrentNumber plugin for that.

With the g<Cq> mapping, you can go to the item in the quickfix / location list for the current cursor position (or the next item after the cursor). It also offers [q / ]q mappings to jump to previous / next errors while limiting the navigation to errors in the current buffer.

Answer 2

I think that it's not possible, at least with default Vim commands or Syntastic.

But Syntastic actually echoes the error message associated with the current line in your command-line. This feature is enabled by default.

Answer 3

I just created this for my :Man viewer. It tracks the current item in the 'locationlist' window when navigating:

function! s:visibleLoc()
   return len(filter(getwininfo(), {i,v -> v.loclist}))
endfunc

function! s:followLine()
   let curLine = line(".")
   if (exists("b:lastLine") && b:lastLine == curLine) || 0 == s:visibleLoc()
      return
   endif
   let b:lastLine = line(".")
   let ent = len(filter(getloclist("."), {i,v -> v.lnum <= curLine}))
   if ent < 1 || (exists("b:lastEntry") && b:lastEntry == ent)
      return
   endif
   let b:lastEntry = ent
   let pos = [ 0, curLine, col("."), 0 ]
   exe "ll ".ent
   call setpos(".", pos)
endfunc

au CursorMoved <buffer> call <SID>followLine()

Answer 4

I tried to get this feature 'in' here which resulted in:

vim-loclist-follow:
https://www.vim.org/scripts/script.php?script_id=5799
https://github.com/elbeardmorez/vim-loclist-follow

Nothing fancy, it just ensures the 'nearest' item is selected. Works for me (™️) using either of my Syntastic, or now Ale, setups.