support maskingvalue for MFDataset and DeferDataset

Author: Alexander-Barth

src/defer.jl

@@ -83,6 +83,12 @@ groupname(dds::DeferDataset) = dds.groupname
 path(dds::DeferDataset) = dds.r.filename
 varnames(dds::DeferDataset) = collect(keys(dds.data[:var]))
 
+function maskingvalue(dds::DeferDataset{TDS}) where TDS
+    TDS(dds.r.filename,dds.r.mode; dds.r.args...) do ds
+        maskingvalue(ds)
+    end
+end
+
 function Variable(f::Function, dv::DeferVariable{T,N,TDS}) where {T,N,TDS}
     TDS(dv.r.filename,dv.r.mode; dv.r.args...) do ds
         f(variable(ds,dv.varname))

src/multifile.jl

@@ -175,6 +175,9 @@ function varnames(mfds::MFDataset)
     end
 end
 
+maskingvalue(mfds::MFDataset) = maskingvalue(mfds.ds[1])
+
+
 Base.parent(v::MFVariable) = v.var
 Base.parent(v::MFCFVariable) = v.var
 Base.Array(v::MFVariable) = Array(parent(v))