Sender: |
|
Date: |
Fri, 11 Sep 2015 11:06:08 +0100 |
Reply-To: |
|
Message-ID: |
|
Subject: |
|
MIME-Version: |
1.0 |
Content-Transfer-Encoding: |
7bit |
In-Reply-To: |
|
Content-Type: |
text/plain; charset=iso-8859-15 |
From: |
|
Parts/Attachments: |
|
|
On 11/09/2015 10:46, Alexander Grahn wrote:
> Good afternoon,
>
> consider the following example:
>
> \documentclass{article}
> \usepackage{expl3}
>
> \begin{document}
> \ExplSyntaxOn
> \clist_set:Nn\l_tmpa_clist{,,foo,bar,}
> \typeout{\clist_count:N\l_tmpa_clist} %expected: 5, I get 2.
> \typeout{\clist_item:Nn\l_tmpa_clist{3}} %expected: `foo`, I get `'.
> \typeout{\clist_item:Nn\l_tmpa_clist{4}} %expected: `bar`, I get `'.
> \ExplSyntaxOff
> \end{document}
>
> Why does \clist_set:Nn ignore empty items when initialising a clist
> variable from a token list? Is this intended behaviour? Is there a
> work-around?
>
> Kind regards
> Alexander
This is by-design. Comma lists can't contain empty items, commas, etc.:
sequences can. The reason is comma lists are 'close' to the user level,
and there stray empty entries are normally best ignored.
Joseph
|
|
|