From: Martin Kronbichler <martin.kronbichler@uni-a.de>
Date: Fri, 15 Dec 2023 08:06:49 +0000 (+0100)
Subject: Merge pull request #16350 from bangerth/optional
X-Git-Tag: relicensing~244
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad01b962b8f624e9c369d506c1b7159f8c815b0d;p=dealii.git

Merge pull request #16350 from bangerth/optional

Use std::optional instead of a hand-rolled version of it.
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ad01b962b8f624e9c369d506c1b7159f8c815b0d