add missing docstring for Free BC (#530)

JuliaMath · Dec 10, 2022 · a5fc5d6 · a5fc5d6
1 parent e3325a2
commit a5fc5d6
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/Interpolations.jl b/src/Interpolations.jl
@@ -94,6 +94,7 @@ struct Throw{GT<:Union{GridType,Nothing}} <: BoundaryCondition gt::GT end
 struct Flat{GT<:Union{GridType,Nothing}} <: BoundaryCondition gt::GT end
 "`Line(gt)` uses a constant slope for extrapolation"
 struct Line{GT<:Union{GridType,Nothing}} <: BoundaryCondition gt::GT end
+"`Free(gt)` the free boundary condition makes sure the interpoland has a continuous third derivative at the second-to-outermost cell boundary"
 struct Free{GT<:Union{GridType,Nothing}} <: BoundaryCondition gt::GT end
 "`Periodic(gt)` applies periodic boundary conditions"
 struct Periodic{GT<:Union{GridType,Nothing}} <: BoundaryCondition gt::GT end