class MyInt
{
// some code inside....
    operator int() {
        BOOST_STATIC_ASSERT(0 == sizeof(MyInt)); // or some mpl thing
    }
};


"chun ping wang" <cablepuff@gmail.com> wrote in message news:7253f6b30801260850y6bdc052dq4fa01ff64542f93b@mail.gmail.com...
Hi is their anyway for boost to allow only explicit conversion...

like class MyInt
{
// some code inside....
    operator int() {}
};

myIntCalc(int, int);

MyInt a, b;
f = myInt(a, b); // compile error no implicit conversion.

int x = boost::numeric_cast<int>(a); // k allow
int y = static_cast<int>(b); // k allow.



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