Struct for a Libxc functional and some basic information

Functional(identifier::Symbol; n_spin::Integer = 1)

Construct a Functional from a libxc identifier and the number of spins n_spin to consider. `

Return the list of available libxc functionals as strings

Evaluate a functional and store results in passed arrays. If for a particular quantity no array is passed, it is not computed. Required input arguments depend on the functional type (rho for all functionals, sigma for GGA and mGGA, tau and lapl for mGGA).

Evaluate a functional and all derivatives of the energy up to order derivatives. The required input arguments depend on the functional type (rho for all functionals, sigma for GGA and mGGA, tau and lapl for mGGA). Obtained data is returned as a named tuple.

Get the version of the libxc library as a version string