Work around a doxygen problem.

Specifically, do not show 'requires' clauses to doxygen since it has
trouble parsing them and then stalls the CI.

diff --git a/doc/doxygen/options.dox.in b/doc/doxygen/options.dox.in
index 045d5d88b73fe499d2fd5d3664550687cdccb2d4..b465370b59b1987eb85f5ffbb397cf08154775b2 100644 (file)
--- a/doc/doxygen/options.dox.in
+++ b/doc/doxygen/options.dox.in
@@ -184,7 +184,7 @@ PREDEFINED             = DOXYGEN=1 \
                          DEAL_II_HOST_DEVICE= \
                          DEAL_II_ALWAYS_INLINE= \
                          __device__= \
-                        DEAL_II_CXX20_REQUIRES=requires \
+                        DEAL_II_CXX20_REQUIRES(x)= \
                          DEAL_II_WITH_ADOLC=1 \
                          DEAL_II_ADOLC_WITH_ADVANCED_BRANCHING=1 \
                          DEAL_II_ADOLC_WITH_ATRIG_ERF=1 \