Derive Macro SitePairEnergy 

#[derive(SitePairEnergy)]

Automatically implement the hoomd_interaction::SitePairEnergy trait.

The implemented site_pair_energy sums the result of site_pair_energy over all fields. The implementation returns early when any one field returns infinity. The implemented site_pair_energy_initial behaves similarly. The derived is_only_infinite_or_zero returns true only when all fields also return true for the same method.

Valid on:

• Structs with named fields.
• Tuple structs.