in fact they wouldn't have needed any modification, but returning
constant references instead of copies of the stored values saves quite
a few calls to copy constructors.
besides this, fluid states are now required to export the 'Scalar'
type, which allows to use it outside of the FluidState without
resorting to the c++ 'decltype' construct.
they used to be in opm-core, but this allows to be more flexible with
the dependency order: What's now called "opm-core" can easily depend
on opm-material which might come in handy for the refactoring.
Besides moving in classes from opm-core, the infrastructural code
which was still in opm-material is moved to the directory
opm/material/common. The intention is to collect these classes at a
central location to make it easy to move them to a real "core" module.
(if this is ever going to happen.)
- the StaticTabulated2DFunction class and the base class
(Tabulated2DFunction) are gone
- the DynamicTabulated2DFunction class has been renamed to
UniformTabulated2DFunction
- a new class called UniformXTabulated2DFunction has been
introduced. Like UniformTabulated2DFunction, it assumes uniform
intervalls of the sampling points in X direction, but in contrast to
UniformTabulated2DFunction, the Y locations of the sampling points
can be set freely (as long as they are specified in increasing order
for each x value)
- add a unit test for the two tabulation classes
