pw_preprocessor: Macros for disabling warnings
Change-Id: I00e9b00d93b46fa7a30e2cb7e6b83e5a81310585
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/40460
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_preprocessor/compiler_test.cc b/pw_preprocessor/compiler_test.cc
new file mode 100644
index 0000000..2fd79cf
--- /dev/null
+++ b/pw_preprocessor/compiler_test.cc
@@ -0,0 +1,50 @@
+// Copyright 2021 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "pw_preprocessor/compiler.h"
+
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+namespace pw::preprocessor {
+namespace {
+
+PW_MODIFY_DIAGNOSTICS_PUSH();
+PW_MODIFY_DIAGNOSTIC(ignored, "-Wunused-variable");
+
+int this_variable_is_unused;
+
+PW_MODIFY_DIAGNOSTICS_POP();
+
+class Foo {
+ PW_MODIFY_DIAGNOSTICS_PUSH();
+ PW_MODIFY_DIAGNOSTIC(ignored, "-Wunused");
+
+ int this_field_is_unused;
+
+ PW_MODIFY_DIAGNOSTICS_POP();
+};
+
+TEST(CompilerMacros, ModifyDiagnostics) {
+ PW_MODIFY_DIAGNOSTICS_PUSH();
+ PW_MODIFY_DIAGNOSTIC(ignored, "-Wunused-variable");
+
+ int this_variable_also_is_unused;
+
+ PW_MODIFY_DIAGNOSTICS_POP();
+}
+
+} // namespace
+} // namespace pw::preprocessor