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Re: A ZLE widget for calculator

On 2026-02-03 13:21, Peter Stephenson wrote:

On 03/02/2026 07:16 GMT Vincent Bernat <bernat@xxxxxxxx> wrote:
# Simple calculator
_vbe_calc_accept_line() {
      if [[ $BUFFER =~ "= *" ]]; then
          local expr=${BUFFER#= }
          zle -I
          command numbat -e "$expr"
          print
          print -s $BUFFER
          BUFFER=""
      else
          zle .accept-line
      fi
}
zle -N accept-line _vbe_calc_accept_line

It almost work, but the buffer is not available in the immediate history
(because no accept-line was called). If I press the up arrow, I get the
previous one instead.


Does adding "print -s <line>" to the function work?
This is already there. It works. If I hit return, then up, it works. But if I press only up, it does not. It seems accept-line widget is needed for the line to be added to the history. 


(I was thinking about getting the shell to ignore the line executed as
well --- there are features for this --- but it's not quite smooth as
the line does hang around until after you execute something else, so
doesn't look like that would be what you want.  But maybe you now have
enough anyway...)
I can prefix with a space if that's what you mean, but in this case pressing up just after will recall this instance (which is quoted). So, yes, this is not as smooth as I would like. 

Thanks!
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