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55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//===- llvm/ADT/ScopeExit.h - Execute code at scope exit --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the make_scope_exit function, which executes user-defined
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// cleanup logic at scope exit.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_SCOPE_EXIT_H
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#define LLVM_ADT_SCOPE_EXIT_H
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#include "llvm/Support/Compiler.h"
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#include <type_traits>
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#include <utility>
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namespace llvm {
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namespace detail {
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template <typename Callable> class scope_exit {
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Callable ExitFunction;
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public:
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template <typename Fp>
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explicit scope_exit(Fp &&F) : ExitFunction(std::forward<Fp>(F)) {}
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scope_exit(scope_exit &&Rhs) : ExitFunction(std::move(Rhs.ExitFunction)) {}
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~scope_exit() { ExitFunction(); }
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};
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} // end namespace detail
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// Keeps the callable object that is passed in, and execute it at the
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// destruction of the returned object (usually at the scope exit where the
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// returned object is kept).
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//
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// Interface is specified by p0052r2.
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template <typename Callable>
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detail::scope_exit<typename std::decay<Callable>::type>
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LLVM_ATTRIBUTE_UNUSED_RESULT make_scope_exit(Callable &&F) {
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return detail::scope_exit<typename std::decay<Callable>::type>(
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std::forward<Callable>(F));
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}
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} // end namespace llvm
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#endif
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