[Boost-users] [boost-users] [general]

[chun ping wang]

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.

[Zeljko Vrba]

On Sat, Jan 26, 2008 at 08:50:42AM -0800, chun ping wang wrote:
>
> Hi is their anyway for boost to allow only explicit conversion...
>

Why not just use a method?

> like class MyInt
> {
> // some code inside....

int to_int() const;

> };
>
> 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 x = a.to_int();

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[chun ping wang]

cause i want to use it in a generic function and other numeric type your_int may or not have to_int...

[Robert Ramey]

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

        BOOST_STATIC_ASSERT(0 == sizeof(MyInt)); // or some mpl thing

    }
};

"chun ping wang" <cabl...@gmail.com> wrote in message news:7253f6b30801260850y6bd...@mail.gmail.com...