--- /dev/null
+//===- llvm/ADT/ScopeExit.h - Execute code at scope exit --------*- 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 the make_scope_exit function, which executes user-defined
+// cleanup logic at scope exit.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ADT_SCOPE_EXIT_H
+#define LLVM_ADT_SCOPE_EXIT_H
+
+#include "llvm/Support/Compiler.h"
+
+#include <type_traits>
+#include <utility>
+
+namespace llvm {
+namespace detail {
+
+template <typename Callable> class LLVM_ATTRIBUTE_UNUSED_RESULT scope_exit {
+ Callable ExitFunction;
+
+public:
+ template <typename Fp>
+ explicit scope_exit(Fp &&F) : ExitFunction(std::forward<Fp>(F)) {}
+
+ scope_exit(const scope_exit &) = default;
+ scope_exit(scope_exit &&) = default;
+
+ ~scope_exit() { ExitFunction(); }
+};
+
+} // end namespace detail
+
+// Keeps the callable object that is passed in, and execute it at the
+// destruction of the returned object (usually at the scope exit where the
+// returned object is kept).
+//
+// Interface is specified by p0052r2.
+template <typename Callable>
+detail::scope_exit<typename std::decay<Callable>::type>
+make_scope_exit(Callable &&F) {
+ return detail::scope_exit<typename std::decay<Callable>::type>(
+ std::forward<Callable>(F));
+}
+
+} // end namespace llvm
+
+#endif
--- /dev/null
+//===- llvm/unittest/ADT/ScopeExit.cpp - Scope exit unit tests --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ScopeExit.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(ScopeExitTest, Basic) {
+ struct Callable {
+ bool &Called;
+ Callable(bool &Called) : Called(Called) {}
+ Callable(Callable &&RHS) : Called(RHS.Called) {}
+ void operator()() { Called = true; }
+ };
+ bool Called = false;
+ {
+ auto g = make_scope_exit(Callable(Called));
+ EXPECT_FALSE(Called);
+ }
+ EXPECT_TRUE(Called);
+}
+
+} // end anonymous namespace