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40 lines
941 B
C++
40 lines
941 B
C++
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// Copyright (c) 2014-2022 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
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#ifndef TAO_PEGTL_INTERNAL_UNWIND_GUARD_HPP
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#define TAO_PEGTL_INTERNAL_UNWIND_GUARD_HPP
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#include "../config.hpp"
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#include <optional>
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#include <utility>
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namespace TAO_PEGTL_NAMESPACE::internal
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{
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template< typename Unwind >
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struct unwind_guard
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{
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explicit unwind_guard( Unwind&& unwind_impl )
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: unwind( std::move( unwind_impl ) )
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{}
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~unwind_guard()
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{
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if( unwind ) {
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( *unwind )();
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}
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}
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unwind_guard( const unwind_guard& ) = delete;
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unwind_guard( unwind_guard&& ) noexcept = delete;
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unwind_guard& operator=( const unwind_guard& ) = delete;
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unwind_guard& operator=( unwind_guard&& ) noexcept = delete;
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std::optional< Unwind > unwind;
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};
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} // namespace TAO_PEGTL_NAMESPACE::internal
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#endif
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