#[cfg(feature = "gc_pcsaft")]

use crate::gc_pcsaft::GcPcSaftFunctional;

use crate::hard_sphere::FMTFunctional;

#[cfg(feature = "pcsaft")]

use crate::pcsaft::PcSaftFunctional;

#[cfg(feature = "pets")]

use crate::pets::PetsFunctional;

#[cfg(feature = "saftvrqmie")]

use crate::saftvrqmie::SaftVRQMieFunctional;

use feos_core::*;

use feos_derive::{Components, HelmholtzEnergyFunctional};

use feos_dft::adsorption::*;

use feos_dft::solvation::*;

use feos_dft::*;

use ndarray::{Array1, Array2};

use petgraph::graph::UnGraph;

use petgraph::Graph;

use quantity::si::*;

/// Collection of different [HelmholtzEnergyFunctional] implementations.

///

/// Particularly relevant for situations in which generic types

/// are undesirable (e.g. FFI).

#[derive(Components, HelmholtzEnergyFunctional)]

pub enum FunctionalVariant {

#[cfg(feature = "pcsaft")]

#[implement(fluid_parameters, molar_weight, pair_potential)]

PcSaft(PcSaftFunctional),

#[cfg(feature = "gc_pcsaft")]

#[implement(fluid_parameters, molar_weight, bond_lengths)]

GcPcSaft(GcPcSaftFunctional),

#[cfg(feature = "pets")]

#[implement(fluid_parameters, molar_weight, pair_potential)]

Pets(PetsFunctional),

#[implement(fluid_parameters, pair_potential)]

Fmt(FMTFunctional),

#[cfg(feature = "saftvrqmie")]

#[implement(fluid_parameters, molar_weight, pair_potential)]

SaftVRQMie(SaftVRQMieFunctional),

}