Re: [Boost-users] [Math / Distributions] How do mean, variance, etc end up in scope?

2 May 2022


      On 5/2/22, Andrea Bocci <andrea.bocci@cern.ch> wrote:
...
Hi Warren,
On Mon, 2 May 2022, 03:29 Warren Weckesser via Boost-users, <
boost-users@lists.boost.org> wrote:
...
In a program like this:
```
#include <boost/math/distributions/beta.hpp>
using boost::math::beta_distribution;
int main()
{
    float a = 1.5f;
    float b = 3.0f;
    beta_distribution<float> dist(a, b);
auto m = mean(dist);
}
```
how does the name 'mean' end up in scope in 'main()'?
this is indeed a C++ question: what you are observing is called "argument
dependent lookup".
...
For more information you can check
https://en.cppreference.com/w/cpp/language/adl .
Hope this helps,
Indeed it does!  Thanks, Andrea.

Warren