Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/clang-tidy/misc/MacroParenthesesCheck.h

@@ -0,0 +1,43 @@
+//===--- MacroParenthesesCheck.h - clang-tidy--------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MACRO_PARENTHESES_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MACRO_PARENTHESES_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+namespace misc {
+
+/// Finds macros that can have unexpected behaviour due to missing parentheses.
+///
+/// Macros are expanded by the preprocessor as-is. As a result, there can be
+/// unexpected behaviour; operators may be evaluated in unexpected order and
+/// unary operators may become binary operators, etc.
+///
+/// When the replacement list has an expression, it is recommended to surround
+/// it with parentheses. This ensures that the macro result is evaluated
+/// completely before it is used.
+///
+/// It is also recommended to surround macro arguments in the replacement list
+/// with parentheses. This ensures that the argument value is calculated
+/// properly.
+class MacroParenthesesCheck : public ClangTidyCheck {
+public:
+  MacroParenthesesCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
+  void registerPPCallbacks(CompilerInstance &Compiler) override;
+};
+
+} // namespace misc
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MACRO_PARENTHESES_H