Add a comment to coupled boundary condition (trixi-framework#1990)

* Add a comment to coupled boundary condition * Update src/semidiscretization/semidiscretization_coupled.jl Co-authored-by: Michael Schlottke-Lakemper <[email protected]> --------- Co-authored-by: Michael Schlottke-Lakemper <[email protected]>
DanielDoehring · Jun 25, 2024 · def208b · def208b
1 parent 0358146
commit def208b
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/semidiscretization/semidiscretization_coupled.jl b/src/semidiscretization/semidiscretization_coupled.jl
@@ -429,7 +429,12 @@ BoundaryConditionCoupled(2, (:j, :i_backwards, :end), Float64, fun)
 !!! warning "Experimental code"
     This is an experimental feature and can change any time.
 """
-mutable struct BoundaryConditionCoupled{NDIMS, other_semi_index, NDIMST2M1,
+mutable struct BoundaryConditionCoupled{NDIMS,
+                                        # Store the other semi index as type parameter,
+                                        # so that retrieving the other semidiscretization
+                                        # is type-stable.
+                                        # x-ref: https://github.com/trixi-framework/Trixi.jl/pull/1979
+                                        other_semi_index, NDIMST2M1,
                                         uEltype <: Real, Indices, CouplingConverter}
     # NDIMST2M1 == NDIMS * 2 - 1
     # Buffer for boundary values: [variable, nodes_i, nodes_j, cell_i, cell_j]