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// { dg-do assemble  }

// All the pointer_to_binary_function cases used to fail because g++

// couldn't handle converting an overloaded function to a class type.

// The first one should still fail because it requires an implicit conversion

// to pointer_to_binary_function, which has an `explicit' constructor.

#include 

#include 

#include 

using namespace std;

template  class Expr

{

public :

  Expr(){};

  Expr(const T&){};

};

template 

inline bool compare(const Expr a, const Expr b){ return true; }

int main()

{

  vector        a(3);

  sort( a.begin(), a.end(),

        static_cast,const Expr)>(compare) );

  sort( a.begin(), a.end(), compare );

  sort::iterator,

       pointer_to_binary_function, const Expr, bool> >

    ( a.begin(), a.end(), compare ); // { dg-error "" } constructor is explicit

  sort( a.begin(), a.end(),

        ptr_fun, const Expr, bool> (compare) );

  sort( a.begin(), a.end(),

        ptr_fun(compare) );

  sort( a.begin(), a.end(),

        pointer_to_binary_function, const Expr, bool>(compare) );

  sort( a.begin(), a.end(),

        pointer_to_binary_function, const Expr, bool>(compare) );

  sort( a.begin(), a.end(),

        pointer_to_binary_function, const Expr, bool>(compare<>) );

}