-Wunused-but-set-{parameter,variable} in CompilerTest_compilerplugins_clang

...new with Clang trunk 13.  As a rule of thumb, this change adds explicit
cast-to-void silencing in those .cxx that already contained other such silencing
casts and adds wholesale #pragma clang diagnostic ignored in all others.

Change-Id: I1884496ee1aa81aaf3c8b3533534a4b69b185e9e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116660
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/compilerplugins/clang/test/writeonlyvars.cxx b/compilerplugins/clang/test/writeonlyvars.cxx
index 4c3732867a81..0fc141f62dd2 100644
--- a/compilerplugins/clang/test/writeonlyvars.cxx
+++ b/compilerplugins/clang/test/writeonlyvars.cxx
@@ -40,6 +40,7 @@ void test()
     int* m_bar3b;
     m_bar3 = nullptr;
     m_bar3b = m_bar3 = nullptr;
+    (void)m_bar3b;
 
     // check that we see reads of field when passed to a function pointer
     // check that we see read of a field that is a function pointer
@@ -91,6 +92,7 @@ void test()
     // expected-error@+1 {{read any2 [loplugin:writeonlyvars]}}
     css::uno::Any any2;
     any2 <<= m_bar10;
+    (void)any2;
 };
 };