Re: How to get current input string in predicate to completing-read

[Lennart Borgman (gmail)]

Lennart Borgman (gmail) wrote:
> Lennart Borgman (gmail) wrote:
> > Lennart Borgman (gmail) wrote:
> > > Is it possible to get the current input string from the prompt inside 
> > > the PREDICATE function in completing-read?
> > >
> > > It it is possible then you can for example use regexp matching using 
> > > the input string as a regexp.
> > >
> > > If this is not possible then I suggest to add this functionality.
> >
> > Eh, I believe I found it: (minibuffer-contents)
>
> But ...
>
> The completion function I use in programmed completion get called with 
> FLAG equal to
>
>   (boundaries . )
>
> In
>
>   (info "(elisp) Programmed Completion")
>
> this value of FLAG is not mentioned. The values mentioned for FLAG are:
>
>   t nil 'lambda
>
> Am I misunderstanding something or is there something missing on that 
> info page?

Another try to do what I want: I tried completion-table-dynamic with 
something like the code below. This also fails, but now because when 
showing the completions there seems to be a requirement that the 
minibuffer contents matches the alternative in another way then the 
completion-table-dynamic function did.

This makes it rather unusable. Am I missing something here? Please run 
the function below and try to complete with the input

  Test selection: group TAB

The message buffer will show that the return of completion-fun2 is ok, 
but there is no completion window.

Am I missing something or is this a bug?