epoc32/include/stdapis/boost/detail/workaround.hpp
branchSymbian3
changeset 4 837f303aceeb
parent 3 e1b950c65cb4
--- a/epoc32/include/stdapis/boost/detail/workaround.hpp	Wed Mar 31 12:27:01 2010 +0100
+++ b/epoc32/include/stdapis/boost/detail/workaround.hpp	Wed Mar 31 12:33:34 2010 +0100
@@ -1,19 +1,74 @@
-
-#ifndef BOOST_MPL_AUX_CONFIG_WORKAROUND_HPP_INCLUDED
-#define BOOST_MPL_AUX_CONFIG_WORKAROUND_HPP_INCLUDED
+// Copyright David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef WORKAROUND_DWA2002126_HPP
+# define WORKAROUND_DWA2002126_HPP
 
-// Copyright Aleksey Gurtovoy 2002-2004
+// Compiler/library version workaround macro
+//
+// Usage:
+//
+//     #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+//        // workaround for eVC4 and VC6
+//        ... // workaround code here
+//     #endif
 //
-// Distributed under the Boost Software License, Version 1.0. 
-// (See accompanying file LICENSE_1_0.txt or copy at 
-// http://www.boost.org/LICENSE_1_0.txt)
+// When BOOST_STRICT_CONFIG is defined, expands to 0. Otherwise, the
+// first argument must be undefined or expand to a numeric
+// value. The above expands to:
+//
+//     (BOOST_MSVC) != 0 && (BOOST_MSVC) < 1300
+//
+// When used for workarounds that apply to the latest known version 
+// and all earlier versions of a compiler, the following convention 
+// should be observed:
+//
+//     #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1301))
 //
-// See http://www.boost.org/libs/mpl for documentation.
+// The version number in this case corresponds to the last version in
+// which the workaround was known to have been required. When
+// BOOST_DETECT_OUTDATED_WORKAROUNDS is not the defined, the macro
+// BOOST_TESTED_AT(x) expands to "!= 0", which effectively activates
+// the workaround for any version of the compiler. When
+// BOOST_DETECT_OUTDATED_WORKAROUNDS is defined, a compiler warning or
+// error will be issued if the compiler version exceeds the argument
+// to BOOST_TESTED_AT().  This can be used to locate workarounds which
+// may be obsoleted by newer versions.
+
+# ifndef BOOST_STRICT_CONFIG
 
-// $Source: /cvsroot/boost/boost/boost/mpl/aux_/config/workaround.hpp,v $
-// $Date: 2004/09/02 15:40:45 $
-// $Revision: 1.3 $
+#  define BOOST_WORKAROUND(symbol, test)                \
+        ((symbol != 0) && (1 % (( (symbol test) ) + 1)))
+//                              ^ ^           ^ ^
+// The extra level of parenthesis nesting above, along with the
+// BOOST_OPEN_PAREN indirection below, is required to satisfy the
+// broken preprocessor in MWCW 8.3 and earlier.
+//
+// The basic mechanism works as follows:
+//      (symbol test) + 1        =>   if (symbol test) then 2 else 1
+//      1 % ((symbol test) + 1)  =>   if (symbol test) then 1 else 0
+//
+// The complication with % is for cooperation with BOOST_TESTED_AT().
+// When "test" is BOOST_TESTED_AT(x) and
+// BOOST_DETECT_OUTDATED_WORKAROUNDS is #defined,
+//
+//      symbol test              =>   if (symbol <= x) then 1 else -1
+//      (symbol test) + 1        =>   if (symbol <= x) then 2 else 0
+//      1 % ((symbol test) + 1)  =>   if (symbol <= x) then 1 else divide-by-zero
+//
 
-#include <boost/detail/workaround.hpp>
+#  ifdef BOOST_DETECT_OUTDATED_WORKAROUNDS
+#   define BOOST_OPEN_PAREN (
+#   define BOOST_TESTED_AT(value)  > value) ?(-1): BOOST_OPEN_PAREN 1
+#  else
+#   define BOOST_TESTED_AT(value) != ((value)-(value))
+#  endif
 
-#endif // BOOST_MPL_AUX_CONFIG_WORKAROUND_HPP_INCLUDED
+# else
+
+#  define BOOST_WORKAROUND(symbol, test) 0
+
+# endif 
+
+#endif // WORKAROUND_DWA2002126_HPP