1 #ifndef BOOST_CORE_NO_EXCEPTIONS_SUPPORT_HPP 2 #define BOOST_CORE_NO_EXCEPTIONS_SUPPORT_HPP 3 4 #if defined(_MSC_VER) 5 # pragma once 6 #endif 7 8 //---------------------------------------------------------------------- 9 // (C) Copyright 2004 Pavel Vozenilek. 10 // Use, modification and distribution is subject to the Boost Software 11 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt 12 // or copy at http://www.boost.org/LICENSE_1_0.txt) 13 // 14 // 15 // This file contains helper macros used when exception support may be 16 // disabled (as indicated by macro BOOST_NO_EXCEPTIONS). 17 // 18 // Before picking up these macros you may consider using RAII techniques 19 // to deal with exceptions - their syntax can be always the same with 20 // or without exception support enabled. 21 //---------------------------------------------------------------------- 22 23 #include <boost/config.hpp> 24 #include <boost/config/workaround.hpp> 25 26 #if !(defined BOOST_NO_EXCEPTIONS) 27 # define BOOST_TRY { try 28 # define BOOST_CATCH(x) catch(x) 29 # define BOOST_RETHROW throw; 30 # define BOOST_CATCH_END } 31 #else 32 # if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x564)) 33 # define BOOST_TRY { if ("") 34 # define BOOST_CATCH(x) else if (!"") 35 # elif !defined(BOOST_MSVC) || BOOST_MSVC >= 1900 36 # define BOOST_TRY { if (true) 37 # define BOOST_CATCH(x) else if (false) 38 # else 39 // warning C4127: conditional expression is constant 40 # define BOOST_TRY { \ 41 __pragma(warning(push)) \ 42 __pragma(warning(disable: 4127)) \ 43 if (true) \ 44 __pragma(warning(pop)) 45 # define BOOST_CATCH(x) else \ 46 __pragma(warning(push)) \ 47 __pragma(warning(disable: 4127)) \ 48 if (false) \ 49 __pragma(warning(pop)) 50 # endif 51 # define BOOST_RETHROW 52 # define BOOST_CATCH_END } 53 #endif 54 55 56 #endif 57