epoc32/include/stdapis/boost/static_warning.hpp
branchSymbian2
changeset 2 2fe1408b6811
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/stdapis/boost/static_warning.hpp	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,180 @@
+#ifndef BOOST_STATIC_WARNING_HPP
+#define BOOST_STATIC_WARNING_HPP
+
+//  (C) Copyright Robert Ramey 2003. Jonathan Turkanis 2004.
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/static_assert for documentation.
+
+/*
+ Revision history:
+   15 June  2003 - Initial version.
+   31 March 2004 - improved diagnostic messages and portability 
+                   (Jonathan Turkanis)
+   03 April 2004 - works on VC6 at class and namespace scope
+                 - ported to DigitalMars
+                 - static warnings disabled by default; when enabled,
+                   uses pragmas to enable required compiler warnings
+                   on MSVC, Intel, Metrowerks and Borland 5.x.
+                   (Jonathan Turkanis)
+   30 May 2004   - tweaked for msvc 7.1 and gcc 3.3
+                 - static warnings ENabled by default; when enabled,
+                   (Robert Ramey)
+*/
+
+#include <boost/config.hpp>
+
+//
+// Implementation
+// Makes use of the following warnings:
+//  1. GCC prior to 3.3: division by zero.
+//  2. BCC 6.0 preview: unreferenced local variable.
+//  3. DigitalMars: returning address of local automatic variable.
+//  4. VC6: class previously seen as struct (as in 'boost/mpl/print.hpp')
+//  5. All others: deletion of pointer to incomplete type.
+//
+// The trick is to find code which produces warnings containing the name of
+// a structure or variable. Details, with same numbering as above:
+// 1. static_warning_impl<B>::value is zero iff B is false, so diving an int
+//    by this value generates a warning iff B is false.
+// 2. static_warning_impl<B>::type has a constructor iff B is true, so an
+//    unreferenced variable of this type generates a warning iff B is false.
+// 3. static_warning_impl<B>::type overloads operator& to return a dynamically
+//    allocated int pointer only is B is true, so  returning the address of an
+//    automatic variable of this type generates a warning iff B is fasle.
+// 4. static_warning_impl<B>::STATIC_WARNING is decalred as a struct iff B is 
+//    false. 
+// 5. static_warning_impl<B>::type is incomplete iff B is false, so deleting a
+//    pointer to this type generates a warning iff B is false.
+//
+
+//------------------Enable selected warnings----------------------------------//
+
+// Enable the warnings relied on by BOOST_STATIC_WARNING, where possible. The 
+// only pragma which is absolutely necessary here is for Borland 5.x, since 
+// W8073 is disabled by default. If enabling selected warnings is considered 
+// unacceptable, this section can be replaced with:
+//   #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x600)
+//    pragma warn +stu
+//   #endif
+
+# if defined(BOOST_MSVC)
+#  pragma warning(2:4150) // C4150: deletion of pointer to incomplete type 'type'.
+# elif defined(BOOST_INTEL) && (defined(__WIN32__) || defined(WIN32))
+#  pragma warning(2:457) // #457: delete of pointer to incomplete class.
+# elif defined(__BORLANDC__) && (__BORLANDC__ <= 0x600)
+#  pragma warn +stu  // W8073: Undefined structure 'structure'.
+# elif defined(__MWERKS__)
+#  pragma extended_errorcheck on // Enable 'extended error checking'.
+# endif
+
+//------------------Configure-------------------------------------------------//
+
+# if defined(__BORLANDC__) && (__BORLANDC__ >= 0x600)
+#  define BOOST_HAS_DESCRIPTIVE_UNREFERENCED_VARIABLE_WARNING
+# elif defined(__GNUC__) && !defined(BOOST_INTEL) // && (__GNUC__ * 100 + __GNUC_MINOR__ <= 302)
+#  define BOOST_HAS_DESCRIPTIVE_DIVIDE_BY_ZERO_WARNING
+# elif defined(__DMC__)
+#  define BOOST_HAS_DESCRIPTIVE_RETURNING_ADDRESS_OF_TEMPORARY_WARNING
+# elif defined(BOOST_MSVC) // && (BOOST_MSVC < 1300)
+#  define BOOST_NO_PREDEFINED_LINE_MACRO
+#  pragma warning(disable:4094) // C4094: untagged 'stuct' declared no symbols
+#endif
+
+//------------------Helper templates------------------------------------------//
+
+namespace boost {
+
+struct STATIC_WARNING;
+
+template<bool>
+struct static_warning_impl;
+
+template<>
+struct static_warning_impl<false> {
+    enum { value = 0 };
+    #if !defined(BOOST_HAS_DESCRIPTIVE_UNREFERENCED_VARIABLE_WARNING) && \
+        !defined(BOOST_HAS_DESCRIPTIVE_RETURNING_ADDRESS_OF_TEMPORARY_WARNING)
+        typedef boost::STATIC_WARNING type;
+    #else
+        typedef int type;
+    #endif
+    #if defined(BOOST_NO_PREDEFINED_LINE_MACRO)
+        struct STATIC_WARNING { };
+    #endif
+};
+
+template<>
+struct static_warning_impl<true> {
+    enum { value = 1 };
+    struct type { type() { } int* operator&() { return new int; } };
+    #if defined(BOOST_NO_PREDEFINED_LINE_MACRO)
+        class STATIC_WARNING { };
+    #endif
+};
+
+} // namespace boost
+
+//------------------Definition of BOOST_STATIC_WARNING------------------------//
+
+#if defined(BOOST_HAS_DESCRIPTIVE_UNREFERENCED_VARIABLE_WARNING)
+#    define BOOST_STATIC_WARNING_IMPL(B)                   \
+     struct BOOST_JOIN(STATIC_WARNING, __LINE__) {         \
+       void f() {                                          \
+           ::boost::static_warning_impl<(bool)( B )>::type \
+           STATIC_WARNING;                                 \
+       }                                                   \
+     }                                                     \
+     /**/
+#elif defined(BOOST_HAS_DESCRIPTIVE_RETURNING_ADDRESS_OF_TEMPORARY_WARNING)
+#    define BOOST_STATIC_WARNING_IMPL(B)                        \
+     struct BOOST_JOIN(STATIC_WARNING, __LINE__) {              \
+        int* f() {                                              \
+            ::boost::static_warning_impl<(bool)( B )>::type     \
+            STATIC_WARNING;                                     \
+            return &STATIC_WARNING;                             \
+        }                                                       \
+     }                                                          \
+     /**/
+#elif defined(BOOST_HAS_DESCRIPTIVE_DIVIDE_BY_ZERO_WARNING)
+#    define BOOST_STATIC_WARNING_IMPL(B)                             \
+     struct BOOST_JOIN(STATIC_WARNING, __LINE__) {                   \
+         int f() { int STATIC_WARNING = 1;                           \
+                   return STATIC_WARNING /                           \
+                   boost::static_warning_impl<(bool)( B )>::value; } \
+     }                                                               \
+     /**/
+#elif defined(BOOST_NO_PREDEFINED_LINE_MACRO) 
+     // VC6; __LINE__ macro broken when -ZI is used see Q199057, so 
+     // non-conforming workaround is used.
+#    define BOOST_STATIC_WARNING_IMPL(B)                       \
+     struct {                                                  \
+        struct S {                                             \
+            typedef boost::static_warning_impl<(bool)( B )> f; \
+            friend class f::STATIC_WARNING;                    \
+        };                                                     \
+     }                                                         \
+     /**/
+#else // Deletion of pointer to incomplete type.
+#    define BOOST_STATIC_WARNING_IMPL(B)                     \
+     struct BOOST_JOIN(STATIC_WARNING, __LINE__) {           \
+         ::boost::static_warning_impl<(bool)( B )>::type* p; \
+         void f() { delete p; }                              \
+     }                                                       \
+     /**/
+#endif
+
+#ifndef BOOST_DISABLE_STATIC_WARNINGS
+# define BOOST_STATIC_WARNING(B) BOOST_STATIC_WARNING_IMPL(B)
+#else // #ifdef BOOST_ENABLE_STATIC_WARNINGS //-------------------------------//
+# define BOOST_STATIC_WARNING(B) BOOST_STATIC_WARNING_IMPL(true)
+#endif
+
+#endif // BOOST_STATIC_WARNING_HPP