Re: handling of completion table duplicates

[Andreas Schwab]

Ingo Lohmar <address@hidden> writes:

> I recently noticed that ivy-mode (at its very core a completing-read
> alternative, just like ido-completing-read is another one) does *not*
> eliminate duplicates from the collection it is passed, eg, in form of a
> plain list.
>
> (completing-read "Prompt: " '("a" "b" "c" "a" "d"))
>
> Both completing-read as well as ido-completing-read remove such
> duplicates,

all-completions doesn't.  The removal is probably just a side effect of
the implementation.

> Is removing duplicates from the collection *expected* from completion
> functions, or is the caller of the function responsible for providing a
> collection without duplicates?

IMHO it's the resposibility of the caller to make sure the completion
table is useful.

Andreas.

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Andreas Schwab, address@hidden
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