in editor, echo opening line to the right of closing lines

It would be "really nice" if while editing source code, a block closing statement indicates to the user the statement that opened the block, if the block is longer than, say, 5 lines.

For if-statements, it would look like this:

  if (m_skyIsStillBlue) {

      watchBirds();

      fishFish();

      somethingElse();

  }    closes if (m_skyIsStillBlue){}

where "closes if (m_skyIsStillBlue)" is one of those nifty prompts that appear automagically, often indicating a likely compile-time error or warning.

Similarly for #if:

  #if Q_OS_WASM

    blah

    more blah

  #endif    closes #if Q_OS_WASM