Delete the content and the brackets of a level above while inside in the inner level

Question

My cursor is at H

{
  //foo
  {
    //bar
    {
      //cursor is Here
    }
    //bar2
  }
}

How do I delete the outer layer of brackets while keeping the layer where my cursor is intact? End result should be:

{
  //foo
  {
    //cursor is Here
  }
}

Same question for foo(bar(/*cursor is Here*/)) => foo(/*cursor is Here*/)

For the first part I think it should start with 2[{dt{ but that doesn't work.

My hacky solution for the 2nd(parenthesis) part: 2[(dt(%dt) or 2[(dt(%x if there is nothing between the last two parenthesis. Is there a better way?

Answer 1

Delete a Block, delete a Block into a black hole register, Paste:

daB"_daBP

Almost what you want, cursor position would be different in the end.

To fix indentation, do =aB

For the second case, you could use almost the same:

dab"_dabp

Answer 2

Building up on Maxim Kim's answer, you can use dVaB to delete a block in "linewise" mode (see :help o_V), and you can use ]p to put the block while adjusting the indent to match the current line. (You should do that from the //foo line.

An alternative to using the black hole register "_ for the second deletion is to use numbered register "2 when you put.

Putting it all together:

dVaBdVaBk"2]p

The k is needed after the second block deletion because the cursor will be on the { line, so you'll want to move up to the //foo one before you put, in order to get the correct indentation.