Compile error with matrix_transformer.apply in Visual C++ 2015

[chw@…]

I just upgraded my code from boost 1.61.0 to 1.66.0 and had to make some smaller changes due to the switch to boost::qvm for the transformations.

However, every single line containing transform (transforming point<double, 3, cartesian> to point<double, 3, cartesian> via matrix_transformer<double, 3, 3>) failed to compile in my case, because the compiler kept complaining that the template argument for operator 'R' could not be deduced.

The compiler errors were not particularly helpful, but I figured out that the following modification helps:

172c172
<             c1 * m_matrix(0,0) + c2 * m_matrix(0,1) + c3 * m_matrix(0,2) + m_matrix(0,3)));
---
>             c1 * qvm::A<0,0>(m_matrix) + c2 * qvm::A<0,1>(m_matrix) + c3 * qvm::A<0,2>(m_matrix) + qvm::A<0,3>(m_matrix)));
174c174
<             c1 * m_matrix(1,0) + c2 * m_matrix(1,1) + c3 * m_matrix(1,2) + m_matrix(1,3)));
---
>             c1 * qvm::A<1,0>(m_matrix) + c2 * qvm::A<1,1>(m_matrix) + c3 * qvm::A<1,2>(m_matrix) + qvm::A<1,3>(m_matrix)));
176c176
<             c1 * m_matrix(2,0) + c2 * m_matrix(2,1) + c3 * m_matrix(2,2) + m_matrix(2,3)));
---
>             c1 * qvm::A<2,0>(m_matrix) + c2 * qvm::A<2,1>(m_matrix) + c3 * qvm::A<2,2>(m_matrix) + qvm::A<2,3>(m_matrix)));

Basically I just replaced m_matrix(i,j) by qvm::A<i,j>(m_matrix) in matrix_transformer::apply.

[awulkiew]

Thanks!

Fix: ​https://github.com/boostorg/geometry/commit/696e03532fda78a7160dcf777a57c9b03938610a