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/* { dg-do compile } */
/* PR c++/21087 */
/* We used to overload the template function with the built-in
declaration, instead of replacing it as we should, and then barf at
the using decl because of a test that none of the overload set
members were anticipated built-ins. */
extern "C" signed int toupper(signed int __c) throw();
namespace std
{
template< typename a > a toupper(a,int){}
using ::toupper;
}
int f () {
std::toupper((signed int)'a');
}
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