From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 20 Aug 2021 20:58:10 +0000 (-0600)
Subject: Add a changelog entry.
X-Git-Tag: v9.4.0-rc1~1027^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F12691%2Fhead;p=dealii.git

Add a changelog entry.
---

diff --git a/doc/news/changes/incompatibilities/20210819Bangerth b/doc/news/changes/incompatibilities/20210819Bangerth
new file mode 100644
index 0000000000..3021b94814
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+++ b/doc/news/changes/incompatibilities/20210819Bangerth
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+Deprecated: The Tensor and SymmetricTensor classes had functions
+`begin_raw()` and `end_raw()` that suggested that the elements of
+these objects are stored in arrays and consequently could be accessed
+consecutively through iterators. While they are indeed stored
+contiguously in memory, they are not part of an array and, as a
+consequence, C++ does not actually allow this kind of access. The
+functions have therefore been deprecated and will be removed in due
+time.
+<br>
+As a consequence, the `make_array_view()` functions that allow turning
+a Tensor or SymmetricTensor into an ArrayView object have now also
+been deprecated.
+<br>
+(Wolfgang Bangerth, 2021/08/19)