How to escape the block using surround?

[littlelinuxoid]

As example, how do i go from

if a {
    b
}

to just b from inside the if block?

[echasnovski]

Could you please elaborate on what you mean by "escape the block"? For 'mini.surround' to be a good candidate to achieve this, there needs to be a way to phrase this like "find left+right parts of surrounding and delete them".

[littlelinuxoid]

Consider a snippet of golang code:

if DEBUG{
   log.Println("Message")
   time.Sleep(time.Second) // <- cursor is on this line
}

is there functionality in mini.surround to remove the if statement and curlies, but keep the inner code? How to do that in the most reliable and easy way?

EDIT: I am aware of sd{, but the if statement from the example doesnt get deleted this way.

[echasnovski]

How to do that in the most reliable and easy way?

I am afraid "reliable" and "easy" here are a bit at odds with each other.

The most reliable way would be to use tree-sitter based surrounding. For this particular case, it seems to require custom tree-sitter queries.

Here is what I've got mostly working:

• Write custom tree-sitter query with two captures: one for the outside (text + left surrounding + right surrounding) and one for the inside (only text without surroundings). For this particular case, put the following code into '~/.config/nvim/after/queries/go/textobjects.scm':

  ;; extends
  (if_statement consequence: (block (statement_list) @if.inner )) @if.outer

  This query was created by trial and error using output of :InspectTree and :EditQuery.

• Create 'mini.surround' config that is local to Go files. That is, in the file '~/.config/nvim/after/ftplugin/go.lua' add the following:

  if _G.MiniSurround ~= nil then
    vim.b.minisurround_config = {
      custom_surroundings = {
        o = {
          input = MiniSurround.gen_spec.input.treesitter({ outer = '@if.outer', inner = '@if.inner' }),
        },
      },
    }
  end

Now after restart, open the Go file and type sho. It should highlight the left and right surroundings. Typing sdo should delete it. There seem to be issues with whitespace, but that is the best I could do with the tree-sitter queries.

---

Alternatively, you can also take a look at "unscope" example of #1951.