From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Mon, 19 Aug 2019 03:04:56 +0000 (-0600)
Subject: Merge pull request #8594 from masterleinad/cxx17optional
X-Git-Tag: v9.2.0-rc1~1224
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=637edd9461606ab24f67cf55e7ebb16aaf447f04;p=dealii.git

Merge pull request #8594 from masterleinad/cxx17optional

Replace boost::optional by std_cxx17::optional.
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637edd9461606ab24f67cf55e7ebb16aaf447f04