https://svn.boost.org/trac10/ticket/10312 <p> For example, these lines are missing from the class <code>matrix_binary_scalar1</code>: </p> <pre class="wiki"> public: // around line 2925 in `matrix_expression.hpp` // Expression accessors BOOST_UBLAS_INLINE const expression1_closure_type &amp;expression1 () const { return e1_; } BOOST_UBLAS_INLINE const expression2_closure_type &amp;expression2 () const { return e2_; } </pre><p> Without these lines is impossible to access to the expression template built by "d*matrix&lt;...&gt;". where d is a scalar. Other similar classes also miss this, in my opinion all this feature should be in based class. </p> <p> This is most likely an oversight </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/10312 Trac 1.4.3