http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48647
Summary: [C++0x] SFINAE does not handle incompatible pointer
types well in conditional operator
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: gintensub...@gmail.com
template< class T >
T&& declval();
template< class T, class U >
decltype( true ? declval<T>() : declval<U>() ) test( int );
template< class T, class U >
void test( ... );
template< class T, class U >
struct is_same {
static const bool value = false;
};
template< class T >
struct is_same<T, T> {
static const bool value = true;
};
int main()
{
typedef decltype( test<int*, double*>(0) ) void_expected;
static_assert( is_same<void_expected, void>::value, "This should be true,
and" );
static_assert( is_same<void_expected, void*>::value, "this should be false."
);
}
-------------------
In this code, type of expression 'test<int*, double*>(0)' should be void,
but gcc (-std=c++0x) says it's void*, on all of following versions:
4.5.1
4.6.0
4.6.1-20110415
4.7.0-20110416
