//===-- SaveAndRestore.h - Utility  -------------------------------*- C++ -*-=//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

///

/// \file

/// This file provides utility classes that use RAII to save and restore

/// values.

///

//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_SAVEANDRESTORE_H

#define LLVM_SUPPORT_SAVEANDRESTORE_H

namespace llvm {

/// A utility class that uses RAII to save and restore the value of a variable.

template <typename T> struct SaveAndRestore {

  SaveAndRestore(T &X) : X(X), OldValue(X) {}

Unexecuted instantiation: _ZN4llvm14SaveAndRestoreIiEC2ERi

Unexecuted instantiation: _ZN4llvm14SaveAndRestoreIjEC2ERj

  SaveAndRestore(T &X, const T &NewValue) : X(X), OldValue(X) {

    X = NewValue;

  }

  ~SaveAndRestore() { X = OldValue; }

Unexecuted instantiation: _ZN4llvm14SaveAndRestoreIiED2Ev

Unexecuted instantiation: _ZN4llvm14SaveAndRestoreIjED2Ev

Unexecuted instantiation: _ZN4llvm14SaveAndRestoreIPNS_21PrettyStackTraceEntryEED2Ev

  T get() { return OldValue; }

private:

  T &X;

  T OldValue;

};

} // namespace llvm

#endif