[eigen] Operand order with bitwise operations in C++

[GondotCl]

When using IntervalVectors and standard types, for example doubles :

IntervalVector x(2);
double y = 0.3;

Binary operators & and | won't work with the mixed-type product as left-hand operand :

IntervalVector z_bad  = (x * y) | x;  // breaks
IntervalVector z_good = x | (x * y); // works

Compilation will output the following :

/codac/build_install/include/eigen3/Eigen/src/Core/functors/BinaryFunctors.h:573:3: 
error: static assertion failed: BITWISE OPERATIONS MAY ONLY BE PERFORMED ON PLAIN DATA TYPES
  573 |   EIGEN_STATIC_ASSERT(!NumTraits<Scalar>::RequireInitialization,
      |   ^~~~~~~~~~~~~~~~~~~

Note : This can be resolved by casting the mixed prodcut to IntervalVector, but this issue can be tricky to detect.