Specify systems of callbacks

Author: romainljsimon

src/molecules.jl

@@ -240,3 +240,7 @@ function compute_chain_correlation(system::Molecules)
     end
     return sum(correlation_array.^2)
 end
+
+Arianna.@callback function chain_correlation(system::Molecules)
+    return compute_chain_correlation(system)
+end

src/utils.jl

@@ -48,14 +48,10 @@ function SpeciesList(species)
     return SpeciesList(ids, heads)
 end
 
-Arianna.@callback function energy(system)
+Arianna.@callback function energy(system::Particles)
     return system.energy[1]
 end
 
-Arianna.@callback function chain_correlation(system)
-    return compute_chain_correlation(system)
-end
-
 function volume_sphere(r, d::Int)
     d == 0 && return 1
     d == 1 && return 2r