Re: feature request: new builtin `defer`, scope delayed eval

[Oğuz İsmail Uysal]

On 10/8/22 6:03 AM, Cynthia Coan wrote:
> Otherwise, I think we can perhaps reword this into two smaller 
> features: "function local trap signals", and 
I don't think this would be a feature worth the time to implement and 
the complexity it would introduce. Is there any other use case for this 
than cleaning up temporary files on function return?

> "options to safely append/prepend to a trap" (for some definition of 
> 'safe', perhaps this just means separating by ';'? Unsure if there's a 
> better way off the top of my head). 
This can be achieved by adding a new option to `trap' that causes it to 
print the action string for given condition. Let this option be named 
`-P', the user would do something like this to update a trap:

    trap "foo;" EXIT
    trap "$(trap -P EXIT)bar;" EXIT