false positive: Variable 'window_size' is assigned a value that is never used

[Rob Deckers]

This code triggers a false positive:

const size_t window_size = 3;
Filter<double, window_size> filter;

template <typename T, std::size_t WindowSize>
    requires(WindowSize % 2 != 0)
class Filter : public IFilter<T>
{
    Filter()
    {
        // reserve memory in container.
        samples_.resize(WindowSize);
    }
  }

Cppcheck states:

someTest.cpp:65:18: style: Variable 'window_size' is assigned a value that is never used. [unreadVariable]
    const size_t window_size = 3;  // Odd number
                 ^

[CHR]

Probably an instance of https://trac.cppcheck.net/ticket/10233