| //===--- ExtensionRAIIObject.h - Use RAII for __extension__ -----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines and implements the ExtensionRAIIObject class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_PARSE_EXTENSION_RAII_OBJECT_H |
| #define LLVM_CLANG_PARSE_EXTENSION_RAII_OBJECT_H |
| |
| #include "clang/Basic/DiagnosticParse.h" |
| |
| namespace clang { |
| |
| /// ExtensionRAIIObject - This saves the state of extension warnings when |
| /// constructed and disables them. When destructed, it restores them back to |
| /// the way they used to be. This is used to handle __extension__ in the |
| /// parser. |
| class ExtensionRAIIObject { |
| void operator=(const ExtensionRAIIObject &); // DO NOT IMPLEMENT |
| ExtensionRAIIObject(const ExtensionRAIIObject&); // DO NOT IMPLEMENT |
| Diagnostic &Diags; |
| bool OldState; |
| public: |
| ExtensionRAIIObject(Diagnostic &diags) : Diags(diags) { |
| OldState = Diags.getWarnOnExtensions(); |
| Diags.setWarnOnExtensions(false); |
| } |
| |
| ~ExtensionRAIIObject() { |
| Diags.setWarnOnExtensions(OldState); |
| } |
| }; |
| } |
| |
| #endif |