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Asked: 2026-05-11T06:24:50+00:00

I have the following snippet: #include <boost/random/lognormal_distribution.hpp> #include <boost/random/lagged_fibonacci.hpp> int main() { const double

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I have the following snippet:

#include <boost/random/lognormal_distribution.hpp> #include <boost/random/lagged_fibonacci.hpp>   int main() {    const double mean  = 0.0;   const double sigma = 1.0;    boost::lognormal_distribution<double> lognorm_dist(mean, sigma);   boost::lagged_fibonacci44497 engine;    // the following line give error in GCC 3.3   const double value = lognorm_dist.operator() <boost::lagged_fibonacci44497>((engine));   }

It compile fine under 

i686-apple-darwin9-g++-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5465)

But under:

g++ (GCC) 3.3.3 (SuSE Linux)

It gave the following error:

Mycode.cc:10:error: `operator()' not defined

How can I fix the problem?

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1 Answer

  1. Why not just lognorm_dist( engine );? Providing ‘function-like’ syntax is the whole point of operator(). That said, lognorm_dist.template operator() <boost::lagged_fibonacci44497>((engine)) should solve your compilation issues if I am not mistaken.

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