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File indexing completed on 2025-09-15 08:55:05
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file corecel/io/ScopedStreamFormat.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include <ios> 0010 0011 #include "corecel/Macros.hh" 0012 0013 namespace celeritas 0014 { 0015 //---------------------------------------------------------------------------// 0016 /*! 0017 * Save a stream's state and restore on destruction. 0018 * 0019 * Example: 0020 * \code 0021 { 0022 ScopedStreamFormat save_fmt(&std::cout); 0023 std::cout << setprecision(16) << 1.0; 0024 } 0025 * \endcode 0026 */ 0027 class ScopedStreamFormat 0028 { 0029 public: 0030 // Construct with stream to safe 0031 explicit inline ScopedStreamFormat(std::ios* s); 0032 0033 // Restore formats on destruction 0034 inline ~ScopedStreamFormat(); 0035 0036 //!@{ 0037 //! Prevent copying and moving for RAII class 0038 CELER_DELETE_COPY_MOVE(ScopedStreamFormat); 0039 //!@} 0040 0041 private: 0042 std::ios* stream_; 0043 std::ios orig_; 0044 }; 0045 0046 //---------------------------------------------------------------------------// 0047 // INLINE DEFINITIONS 0048 //---------------------------------------------------------------------------// 0049 /*! 0050 * Construct with defaults. 0051 */ 0052 ScopedStreamFormat::ScopedStreamFormat(std::ios* s) 0053 : stream_{s}, orig_{nullptr} 0054 { 0055 CELER_EXPECT(s); 0056 orig_.copyfmt(*s); 0057 } 0058 0059 //---------------------------------------------------------------------------// 0060 /*! 0061 * Restore formats on destruction. 0062 */ 0063 ScopedStreamFormat::~ScopedStreamFormat() 0064 { 0065 stream_->copyfmt(orig_); 0066 } 0067 0068 //---------------------------------------------------------------------------// 0069 } // namespace celeritas
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