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add big "what happens inside eigen" tutorial for people interested in

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Eigen internals
This commit is contained in:
Benoit Jacob
2008-12-05 14:45:42 +00:00
parent 2ff7961c10
commit 6d1439a52f
2 changed files with 502 additions and 2 deletions
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4
Eigen/src/Core/CwiseBinaryOp.h
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@@ -93,7 +93,7 @@ class CwiseBinaryOp : ei_no_assignment_operator,
: m_lhs(lhs), m_rhs(rhs), m_functor(func)
{
// we require Lhs and Rhs to have the same scalar type. Currently there is no example of a binary functor
// that would take two operands of different types. If there were such an example, then this check should then be
// that would take two operands of different types. If there were such an example, then this check should be
// moved to the BinaryOp functors, on a per-case basis. This would however require a change in the BinaryOp functors, as
// currently they take only one typename Scalar template parameter.
// It is tempting to always allow mixing different types but remember that this is often impossible in the vectorized paths.
@@ -101,7 +101,7 @@ class CwiseBinaryOp : ei_no_assignment_operator,
// add together a float matrix and a double matrix.
EIGEN_STATIC_ASSERT((ei_is_same_type<typename Lhs::Scalar, typename Rhs::Scalar>::ret),
you_mixed_different_numeric_types__you_need_to_use_the_cast_method_of_MatrixBase_to_cast_numeric_types_explicitly)
// require the sizes to be the same
// require the sizes to match
ei_assert(lhs.rows() == rhs.rows() && lhs.cols() == rhs.cols());
}