Re: A ZLE widget for calculator

On 2026-02-03 13:21, Peter Stephenson wrote:
>> On 03/02/2026 07:16 GMT Vincent Bernat <[email protected]> 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!