Patch based on Manav Bhatia's for type-mixing methods

[roystgnr]

scale_column is a generally useful method; the rest of these should make it easier to mix DenseVector/DenseMatirx objects of real and complex (or of float and double, etc) data types.

[buildhive]

libMesh - C++ Finite Element Library » libmesh #371 SUCCESS
This pull request looks good
(what's this?)

[roystgnr]

That namespace isn't boost::, it's boostcopy:: - basically, years ago I swiped ~10 lines of boost metaprogramming code that I'd otherwise have had to reinvent or add a dependency for.

[pbauman]

Derp. Cool, patch is fine with me then.

[roystgnr]

Cool. Let's give folks a few days before merging this one, though. I want to see if Manav has any comment on that copy_matrix vs operator= question of mine, and it'd be good if people had a chance to test it with their app codes. Manav appears to have been quite careful to use the enable_if ad scalar traits stuff properly, but it's possible we're not seeing some flaw that could be triggered by just the right instantiation. IIRC the first time I tried to put some of this dual-templating stuff into our dense methods, the compiler initially decided that "vector * vector" should now be an outer product...