| // 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 <vector.h> |
| #include <algo.h> |
| |
| template <class T> class Expr |
| { |
| public : |
| Expr(){}; |
| Expr(const T&){}; |
| }; |
| |
| template <class T > |
| inline bool compare(const Expr<T> a, const Expr<T> b){ return true; }; |
| |
| int main() |
| { |
| vector<int> a(3); |
| sort( a.begin(), a.end(), |
| static_cast<bool (*)(const Expr<int>,const Expr<int>)>(compare) ); |
| sort( a.begin(), a.end(), compare<int> ); |
| sort<vector<int>::iterator, |
| pointer_to_binary_function<const Expr<int>, const Expr<int>, bool> > |
| ( a.begin(), a.end(), compare ); // ERROR - constructor is explicit |
| sort( a.begin(), a.end(), |
| ptr_fun<const Expr<int>, const Expr<int>, bool> (compare) ); |
| sort( a.begin(), a.end(), |
| ptr_fun(compare<int>) ); |
| sort( a.begin(), a.end(), |
| pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare) ); |
| sort( a.begin(), a.end(), |
| pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare<int>) ); |
| sort( a.begin(), a.end(), |
| pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare<>) ); |
| } |