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Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-2QYkhdTzM9oOFxjPBVVn"
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Message-ID:  <5e763ceaa35bcfcb772a01b2c202e5e465ca906a.camel@sipsolutions.net>
Date:         Tue, 9 Apr 2019 21:43:55 +0200
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              <LATEX-L@LISTSERV.UNI-HEIDELBERG.DE>
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From:         Benjamin Berg <benjamin@SIPSOLUTIONS.NET>
Subject: Re: Rescanning first token of environment when no optional argument is given
To:           LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
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Status: R

--=-2QYkhdTzM9oOFxjPBVVn
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Hi,

On Mon, 2019-04-01 at 13:05 +0200, Bruno Le Floch wrote:
> Other option: use an xparse environment with "o" signature as you are
> doing, then end the code with
>=20
>     \peek_charcode:NT & { ... } { ... }
>=20
> to detect "&" and replace it by an active "&" (or rather by the
> definition you have for it.

I finally got around to test this. Simply adding
  \peek_charcode_remove:NT & { \sdaps_array_alignment: }
seems to work perfectly!

Thanks,
Benjamin

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