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File indexing completed on 2025-03-13 09:06:28
0001 //----------------------------------*-C++-*----------------------------------// 0002 // Copyright 2022-2024 UT-Battelle, LLC, and other Celeritas developers. 0003 // See the top-level COPYRIGHT file for details. 0004 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0005 //---------------------------------------------------------------------------// 0006 //! \file corecel/io/ScopedStreamFormat.hh 0007 //---------------------------------------------------------------------------// 0008 #pragma once 0009 0010 #include <ios> 0011 0012 #include "corecel/Macros.hh" 0013 0014 namespace celeritas 0015 { 0016 //---------------------------------------------------------------------------// 0017 /*! 0018 * Save a stream's state and restore on destruction. 0019 * 0020 * Example: 0021 * \code 0022 { 0023 ScopedStreamFormat save_fmt(&std::cout); 0024 std::cout << setprecision(16) << 1.0; 0025 } 0026 * \endcode 0027 */ 0028 class ScopedStreamFormat 0029 { 0030 public: 0031 // Construct with stream to safe 0032 explicit inline ScopedStreamFormat(std::ios* s); 0033 0034 // Restore formats on destruction 0035 inline ~ScopedStreamFormat(); 0036 0037 //!@{ 0038 //! Prevent copying and moving for RAII class 0039 CELER_DELETE_COPY_MOVE(ScopedStreamFormat); 0040 //!@} 0041 0042 private: 0043 std::ios* stream_; 0044 std::ios orig_; 0045 }; 0046 0047 //---------------------------------------------------------------------------// 0048 // INLINE DEFINITIONS 0049 //---------------------------------------------------------------------------// 0050 /*! 0051 * Construct with defaults. 0052 */ 0053 ScopedStreamFormat::ScopedStreamFormat(std::ios* s) 0054 : stream_{s}, orig_{nullptr} 0055 { 0056 CELER_EXPECT(s); 0057 orig_.copyfmt(*s); 0058 } 0059 0060 //---------------------------------------------------------------------------// 0061 /*! 0062 * Restore formats on destruction. 0063 */ 0064 ScopedStreamFormat::~ScopedStreamFormat() 0065 { 0066 stream_->copyfmt(orig_); 0067 } 0068 0069 //---------------------------------------------------------------------------// 0070 } // namespace celeritas
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