1 //===- llvm/ADT/ScopeExit.h - Execute code at scope exit --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the make_scope_exit function, which executes user-defined
11 // cleanup logic at scope exit.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_ADT_SCOPE_EXIT_H
16 #define LLVM_ADT_SCOPE_EXIT_H
18 #include "llvm/Support/Compiler.h"
20 #include <type_traits>
26 template <typename Callable> class scope_exit {
27 Callable ExitFunction;
30 template <typename Fp>
31 explicit scope_exit(Fp &&F) : ExitFunction(std::forward<Fp>(F)) {}
33 scope_exit(scope_exit &&Rhs) : ExitFunction(std::move(Rhs.ExitFunction)) {}
35 ~scope_exit() { ExitFunction(); }
38 } // end namespace detail
40 // Keeps the callable object that is passed in, and execute it at the
41 // destruction of the returned object (usually at the scope exit where the
42 // returned object is kept).
44 // Interface is specified by p0052r2.
45 template <typename Callable>
46 LLVM_NODISCARD detail::scope_exit<typename std::decay<Callable>::type>
47 make_scope_exit(Callable &&F) {
48 return detail::scope_exit<typename std::decay<Callable>::type>(
49 std::forward<Callable>(F));
52 } // end namespace llvm