template help? how to instantiate??

[haukero]

hello,

i have a simple 'point'-template class with 2 parameter standard constructor! i wanna instantiate like this :

point<unsigned int> myPoint (x = 0, y = 0);

the compiler (vc++ 6 sp5) thinks 'myPoint' is a function with 2 parameters returning point<unsigned int> instead of a point instance!! ;(

so what can i do to tell the compiler it's an instance and no function! please help!!

thanks a lot,
haukero

 

[StukA]

What you wrote is actually a function prototype. What you need to do depends on your constructor definition, but probably will look like this:
point<unsigned int> MyPoint(0,0);
The x=0,y=0 is what's fooling the compiler I bet (looks like default args).

 

[haukero]

whoops, i posted the wrong instantiation code!

allright, i will post my standard constructor declaration code first, this might be helpful :

// standard constructor point.h template
// 'type' is the generic template parameter
point (type x, type y);

// and this is the right instantiation code,
// which unfortunatelly doesn't work!! ;(
point <unsigned int> myPoint (unsigned int m, unsigned int n);

as you said this looks like a function prototype and the compiler also thinks so, but i think it's the right way to instantiate, so what can i do??

thanks in advance,
haukero

 

[StukA]

OK, try removing the &quot;unsigned int&quot; from in front of m and n - this is a function call, not a prototype - you don't need the type name in the constructor arg list.