Getting reentrancy side effect with autocmd.

Hi,

I got reentrancy side effect with a bufenter autocommand on header considering these feature.

• First def func1 is processing current buffer (cpp, h) to add text_prop on header file and underline them. => works Fin
• Inside this   func1  declare  func2 to search and open underlined header double cliked.

The vim9script that do the job :

export def UnderLineHeaders(): void

  var headers: dict<string> = {}

      .. some stuff

      .. some stuff


  def g:OpeningHeader(): void
      .. some stuff 

      .. some stuff
  enddef

  nnoremap <buffer> <2-Leftmouse> :call g:OpeningHeader()<CR>
enddef

The error I got when double clik on header :

Error detected while processing function OpeningHeader[21]..BufEnter Autocommands for "*.h"..function nvhelper#UnderLineHeaders:
line   28:
E122: Function OpeningHeader already exists, add ! to replace it         

How can I force the g:OpeningHeader def func ?

Thank you

Nicolas

The complete code 

export def UnderLineHeaders(): void

  var patterns: dict<string> = { 'header': '\w\+\.h' }
  var headers: dict<string> = {}

  var list_of_line: list<string> = getline(1, '$')
  var lineno: number = 1
  var res: string = ''

  # identify headers' lines
  for line in list_of_line
    res = matchstr(line, patterns.header)
    if res != ""
      headers[lineno] = res
    endif
    lineno = lineno + 1
  endfor

  # some declarations before adding text prop
  call prop_type_delete('header')
  hi Underlined_Header    ctermbg=NONE ctermfg=NONE  cterm=UNDERLINE guibg=NONE    guifg=NONE      gui=UNDERLINE
  call prop_type_add('header', {'highlight': 'Underlined_Header'})

  # add prop on headers
  var col: number = -1
  for key in keys(headers)
    lineno = key->str2nr()
    col = stridx(getline(lineno), headers[key]) + 1
    call prop_add(lineno, col, {'length': headers[key]->len(), 'type': 'header'})
  endfor

  def g:OpeningHeader(): void
    var curlnum: number = getcurpos()[1]
    var key: string = getcurpos()[1]->string()
    if has_key(headers, key)
      var searchedfile: string = headers[getcurpos()[1]->string()]
      echomsg 'File to search for is ' .. searchedfile

      var currentpath: list<string> = expand("%:p:h")->split('\\')

      var idxfolder: number = 1
      var maxfolders: number = currentpath->len()
      var foundedfile: string = ''
      while  idxfolder < maxfolders
        foundedfile = globpath( currentpath[ : -1 * idxfolder ]->join('\'), "**/" .. searchedfile )
        if foundedfile != ''
          break
        endif
        idxfolder += 1
      endwhile

      echomsg foundedfile
      exe 'e ' .. foundedfile
    else
      echomsg 'Sorry no File to search for.'
    endif
  enddef
  # add double clickable feature => opening header
  nnoremap <buffer> <2-Leftmouse> :call g:OpeningHeader()<CR>
enddef

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