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Fixed is_base_of/is_base_and_derived so that you get a compiler error if you try and use them with an incomplete class type.

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[SVN r39219]
This commit is contained in:
John Maddock
2007-09-12 16:44:16 +00:00
parent fe60c9c994
commit 60963a5d21
1 changed files with 8 additions and 0 deletions
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8
include/boost/type_traits/is_base_and_derived.hpp
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@ -15,6 +15,7 @@
#include <boost/type_traits/detail/ice_and.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/config.hpp>
#include <boost/static_assert.hpp>
// should be the last #include
#include <boost/type_traits/detail/bool_trait_def.hpp>
@ -128,6 +129,13 @@ struct bd_helper
template<typename B, typename D>
struct is_base_and_derived_impl2
{
//
// May silently do the wrong thing with incomplete types
// unless we trap them here:
//
BOOST_STATIC_ASSERT(sizeof(B));
BOOST_STATIC_ASSERT(sizeof(D));
struct Host
{
#if !BOOST_WORKAROUND(BOOST_MSVC, == 1310)