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work-around for Borland addressof(array) bug and associated tests

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[SVN r27656]
This commit is contained in:
Eric Niebler 2005-03-14 23:03:42 +00:00
parent 3ab4d38931
commit ae19cd6236
2 changed files with 25 additions and 1 deletions
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10
addressof_test.cpp
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@ -36,6 +36,14 @@ int test_main(int, char*[])
const volatile nonaddressable& cvx = *px; const volatile nonaddressable& cvx = *px;
BOOST_CHECK(boost::addressof(cvx) == static_cast<const volatile nonaddressable*>(px)); BOOST_CHECK(boost::addressof(cvx) == static_cast<const volatile nonaddressable*>(px));
int nrg[3] = {1,2,3};
int (*pnrg)[3] = &nrg;
BOOST_CHECK(boost::addressof(nrg) == pnrg);
int const cnrg[3] = {1,2,3};
int const (*pcnrg)[3] = &cnrg;
BOOST_CHECK(boost::addressof(cnrg) == pcnrg);
return 0; return 0;
} }

16
include/boost/utility/addressof.hpp
View File

@ -33,6 +33,22 @@ addressof(T& v)
&const_cast<char&>(reinterpret_cast<const volatile char &>(v))); &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
} }
// Borland doesn't like casting an array reference to a char reference
// but these overloads work around the problem.
# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
template<typename T,std::size_t N>
T (*addressof(T (&t)[N]))[N]
{
return reinterpret_cast<T(*)[N]>(&t);
}
template<typename T,std::size_t N>
const T (*addressof(const T (&t)[N]))[N]
{
return reinterpret_cast<const T(*)[N]>(&t);
}
# endif
} }
#endif // BOOST_UTILITY_ADDRESSOF_HPP #endif // BOOST_UTILITY_ADDRESSOF_HPP