How to show diagnostics on hover?

Language Server Protocol (LSP)
1

How to show diagnostics on hover?

I’m trying this solution but it gives me an error

Solution:

Error:

E5108: Error executing lua [string ":lua"]:1: attempt to call field 'show_line_diagnostics' (a nil value)
stack traceback:
	[string ":lua"]:1: in main chunk
1 Like
2

vim.lsp.show_line_diagnostics was replaced with vim.diagnostic.open_float().

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3

I personally use this to show diagnostics only if there is no other floating window (for example, autocompletion) open and shown, so that they don’t overlap:

  -- Function to check if a floating dialog exists and if not
  -- then check for diagnostics under the cursor
  function OpenDiagnosticIfNoFloat()
    for _, winid in pairs(vim.api.nvim_tabpage_list_wins(0)) do
      if vim.api.nvim_win_get_config(winid).zindex then
        return
      end
    end
    -- THIS IS FOR BUILTIN LSP
    vim.diagnostic.open_float(0, {
      scope = "cursor",
      focusable = false,
      close_events = {
        "CursorMoved",
        "CursorMovedI",
        "BufHidden",
        "InsertCharPre",
        "WinLeave",
      },
    })
  end
  -- Show diagnostics under the cursor when holding position
  vim.api.nvim_create_augroup("lsp_diagnostics_hold", { clear = true })
  vim.api.nvim_create_autocmd({ "CursorHold" }, {
    pattern = "*",
    command = "lua OpenDiagnosticIfNoFloat()",
    group = "lsp_diagnostics_hold",
  })
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4

Is there a reason to use command = "lua ... instead of callback=?