43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
// { dg-do assemble }
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// All the pointer_to_binary_function cases used to fail because g++
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// couldn't handle converting an overloaded function to a class type.
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// The first one should still fail because it requires an implicit conversion
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// to pointer_to_binary_function, which has an `explicit' constructor.
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#include <vector>
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#include <algorithm>
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#include <functional>
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using namespace std;
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template <class T> class Expr
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{
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public :
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Expr(){}
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Expr(const T&){}
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};
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template <class T >
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inline bool compare(const Expr<T> a, const Expr<T> b){ return true; }
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int main()
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{
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vector<int> a(3);
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sort( a.begin(), a.end(),
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static_cast<bool (*)(const Expr<int>,const Expr<int>)>(compare) );
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sort( a.begin(), a.end(), compare<int> );
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sort<vector<int>::iterator,
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pointer_to_binary_function<const Expr<int>, const Expr<int>, bool> >
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( a.begin(), a.end(), compare ); // { dg-error "" } constructor is explicit
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sort( a.begin(), a.end(),
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ptr_fun<const Expr<int>, const Expr<int>, bool> (compare) );
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sort( a.begin(), a.end(),
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ptr_fun(compare<int>) );
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sort( a.begin(), a.end(),
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pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare) );
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sort( a.begin(), a.end(),
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pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare<int>) );
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sort( a.begin(), a.end(),
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pointer_to_binary_function<const Expr<int>, const Expr<int>, bool>(compare<>) );
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}
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