template parameter and conversion operator

[bitChanger]

The following code will compile with MSVC 7.1 and with g++ 2.95.3
However, I need it to compile with g++ 3.4.4 which it does not.

If i'm reading my books correctly the template parameter has infinite possible types while operator conversions have a finite number of types, therefore this breaks the c++ standard.

Can someone help me find a workaround and/or a g++ flag to allow this to work.

Thanks.

g++ 3.x and up give the following error:

main.cpp: In function `void setType(const MyType&)':
main.cpp:21: error: 'const class MyType' has no member named 'operator ValType'

#include <string>
using namespace std;
 
class MyType
{
public:
  MyType() {}
  ~MyType() {}
 
  operator char() const { return 'a'; }
  operator int() const { return 1; }
  operator double() const { return 2.0; }
  operator float() const { return 3.0f; }
};
 
template<typename ValType>
void setType(const MyType& val)
{
  ValType type;
  type = val.operator ValType();
}
 
int main()
{
  MyType a;
  setType<double>(a);
  return 0;
}

#include <string>
using namespace std;

class MyType
{
public:
  MyType() {}
  ~MyType() {}

  operator char() const { return 'a'; }
  operator int() const { return 1; }
  operator double() const { return 2.0; }
  operator float() const { return 3.0f; }
};

template<typename ValType>
void setType(const MyType& val)
{
  ValType type;
  type = val.operator ValType();
}

int main()
{
  MyType a;
  setType<double>(a);
  return 0;
}

To copy to clipboard, switch view to plain text mode