williamr@2: #ifndef BOOST_DETAIL_NO_EXCEPTIONS_SUPPORT_HPP_
williamr@2: #define BOOST_DETAIL_NO_EXCEPTIONS_SUPPORT_HPP_
williamr@2: 
williamr@2: #if (defined _MSC_VER) && (_MSC_VER >= 1200)
williamr@2: #  pragma once
williamr@2: #endif
williamr@2: 
williamr@2: //----------------------------------------------------------------------
williamr@2: // (C) Copyright 2004 Pavel Vozenilek.
williamr@2: // Use, modification and distribution is subject to the Boost Software
williamr@2: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt
williamr@2: // or copy at http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: //
williamr@2: // This file contains helper macros used when exception support may be
williamr@2: // disabled (as indicated by macro BOOST_NO_EXCEPTIONS).
williamr@2: //
williamr@2: // Before picking up these macros you may consider using RAII techniques
williamr@2: // to deal with exceptions - their syntax can be always the same with 
williamr@2: // or without exception support enabled.
williamr@2: //
williamr@2: 
williamr@2: /* Example of use:
williamr@2: 
williamr@2: void foo() {
williamr@2:   BOOST_TRY {
williamr@2:     ...
williamr@2:   } BOOST_CATCH(const std::bad_alloc&) {
williamr@2:       ...
williamr@2:       BOOST_RETHROW
williamr@2:   } BOOST_CATCH(const std::exception& e) {
williamr@2:       ...
williamr@2:   }
williamr@2:   BOOST_CATCH_END
williamr@2: }
williamr@2: 
williamr@2: With exception support enabled it will expand into:
williamr@2: 
williamr@2: void foo() {
williamr@2:   { try {
williamr@2:     ...
williamr@2:   } catch (const std::bad_alloc&) {
williamr@2:       ...
williamr@2:       throw;
williamr@2:   } catch (const std::exception& e) {
williamr@2:       ...
williamr@2:   }
williamr@2:   }
williamr@2: }
williamr@2: 
williamr@2: With exception support disabled it will expand into:
williamr@2: 
williamr@2: void foo() {
williamr@2:   { if(true) {
williamr@2:     ...
williamr@2:   } else if (false) {
williamr@2:       ...
williamr@2:   } else if (false)  {
williamr@2:       ...
williamr@2:   }
williamr@2:   }
williamr@2: }
williamr@2: */
williamr@2: //----------------------------------------------------------------------
williamr@2: 
williamr@2: #include <boost/config.hpp>
williamr@2: #include <boost/detail/workaround.hpp>
williamr@2: 
williamr@2: #if !(defined BOOST_NO_EXCEPTIONS)
williamr@2: #    define BOOST_TRY { try
williamr@2: #    define BOOST_CATCH(x) catch(x)
williamr@2: #    define BOOST_RETHROW throw;
williamr@2: #    define BOOST_CATCH_END }
williamr@2: #else
williamr@2: #    if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
williamr@2: #        define BOOST_TRY { if ("")
williamr@2: #        define BOOST_CATCH(x) else if (!"")
williamr@2: #    else
williamr@2: #        define BOOST_TRY { if (true)
williamr@2: #        define BOOST_CATCH(x) else if (false)
williamr@2: #    endif
williamr@2: #    define BOOST_RETHROW
williamr@2: #    define BOOST_CATCH_END }
williamr@2: #endif
williamr@2: 
williamr@2: 
williamr@2: #endif