Re: [boost] [random] example code fails inside struct

Subject: Re: [boost] [random] example code fails inside struct
From: Gevorg Voskanyan (v_gevorg_at_[hidden])
Date: 2011-04-16 06:54:49

Beman Dawes wrote:
>   struct X
>   {
>     boost::mt19937 rng;
>      boost::uniform_int<> million(1,1000000);  // VC++ 10 error  C2059:
> syntax error : 'constant'
>      boost::variate_generator<boost::mt19937&, boost::uniform_int<>  >
>              random_value(rng,  million);
>   };
> 
> Why does the example code from the docs fail to  compile when placed
> inside a struct or class? What am I  missing?

You can't initialize a class data member like that.
boost::uniform_int<> million(1,1000000);  is valid in a function body or in 
namespace-scope, but not in class scope. In C++11 I think you could do this 
however:

boost::uniform_int<> million{1,1000000};

> --Beman

HTH,
Gevorg