fixed problem with isempty (being called during variable definition)

src/PowerNetworkMatrix.jl

@@ -224,11 +224,11 @@ function Base.summary(io::IO, A::PowerNetworkMatrix)
         show(IOContext(io, :limit => true), ax)
         println(io)
     end
-    print(io, "And data, a ", size(A))
+    print(io, "And data with size ", size(A))
     return
 end
 
-_summary(io::IO, A::PowerNetworkMatrix) = println(io, "PowerNetworkMatrix")
+_summary(io::IO, ::T) where T <: PowerNetworkMatrix = println(io, "$T")
 
 function Base.summary(
     io::IOContext{Base.GenericIOBuffer{Array{UInt8, 1}}},
@@ -303,7 +303,7 @@ function Base.show_nd(
     end
 end
 
-function Base.show(io::IO, array::PowerNetworkMatrix)
+function Base.show(io::IO, ::MIME{Symbol("text/plain")}, array::PowerNetworkMatrix)
     summary(io, array)
     isempty(array) && return
     println(io, ":")

src/virtual_lodf_calculations.jl

@@ -167,7 +167,7 @@ function Base.isempty(vlodf::VirtualLODF)
     for name in fieldnames(typeof(vlodf))
         # note: impossible to define empty KLU field
         if name != :K && isempty(getfield(vlodf, name))
-            @info "Field " * string(name) * " is empty."
+            @debug "Field " * string(name) * " is empty."
             return true
         end
     end

src/virtual_ptdf_calculations.jl

@@ -152,10 +152,10 @@ Checks if the any of the fields of VirtualPTDF is empty.
 function Base.isempty(vptdf::VirtualPTDF)
     for name in fieldnames(typeof(vptdf))
         if name == :dist_slack && isempty(getfield(vptdf, name))
-            @info "Field dist_slack has default value: " *
+            @debug "Field dist_slack has default value: " *
                   string(getfield(vptdf, name)) * "."
         elseif !(name in [:K, :dist_slack]) && isempty(getfield(vptdf, name))
-            @info "Field " * string(name) * " not defined."
+            @debug "Field " * string(name) * " not defined."
             return true
         end
     end