misc.fieldnames: supports nested structs.

+misc/fieldnames.m

+function fieldNames = fieldnames(myStruct)
+% misc.fieldnames returns all field names of myStruct. If myStruct is a nested struct, i.e. a struct
+% containing structs as fields, fields will return a string array containing all branches separating
+% every layer with a dot, for instance (level1).(level2).(level3)...
+%%
+% Example
+%		misc.fieldnames(misc.setfield(struct("blub", 1337), "topLevel.lowerLevel.data", 42));
+
+arguments
+	myStruct struct;
+end
+
+fieldNames = string([]);
+for thisFieldName = string(fieldnames(myStruct)).'
+	fieldNames = [fieldNames; fieldNamesOfBranch(myStruct, thisFieldName)];
+end % for thisFieldName
+	
+
+end % fieldnames()
+
+function result = fieldNamesOfBranch(myStruct, branchName)
+arguments
+	myStruct struct;
+	branchName (1, 1) string;
+end % arguments
+
+tmpField = misc.getfield(myStruct, branchName);
+if isstruct(tmpField)
+	subBranchNames = branchName + "." + string(fieldnames(tmpField));
+	result = string([]);
+	for it = 1 : numel(subBranchNames)
+		result = [result; fieldNamesOfBranch(myStruct, subBranchNames(it))];
+	end
+else
+	result = branchName;
+end
+end % 
\ No newline at end of file

+misc/getfield.m

@@ -2,15 +2,15 @@ function myValue = getfield(myStruct, myFieldName)
 % misc.getfield returns data of a struct specified by its field name.
 % In contrast to the matlab built-in function getfield(), this method misc.getfield
 % can also read fields of field by specifying myFieldName with dots as seperator, for
-% instance myFieldName = 'topLevel.lowerLevel.data', see example.
+% instance myFieldName = "topLevel.lowerLevel.data", see example.
 % Additionally, misc.getfield can handle arrays of data, i.e. myFieldName string
 % arrays, by concatenating the result.
 %%
 % Example 1:
-%		myStruct = misc.setfield(struct(), 'topLevel.lowerLevel.data', 42);
-%		result = misc.getfield(myStruct, 'topLevel.lowerLevel.data')
+%		myStruct = misc.setfield(struct(), "topLevel.lowerLevel.data", 42);
+%		result = misc.getfield(myStruct, "topLevel.lowerLevel.data")
 % Example 2:
-%		myStruct = struct('a', 1, 'b', 2);
+%		myStruct = struct("a", 1, "b", 2);
 %		result = misc.getfield(myStruct, ["a", "b"])
 
 arguments
@@ -34,4 +34,5 @@ else % array case
 	for it = 1 : numel(myFieldName)
 		myValue = [myValue, misc.getfield(myStruct, myFieldName(it))];
 	end
-end % plot()
\ No newline at end of file
+end % if isscalar(myFieldName)
+end % getfield()
\ No newline at end of file

+unittests/+misc/testMisc.m

@@ -4,6 +4,19 @@ function [tests] = testMisc()
 tests = functiontests(localfunctions());
 end
 
+function testFieldnames(tc)
+	fieldNames = ["asdf", "blub.asdf.moeb", "bli.bla.blub", "tet.ris", "tetris", "ASDF", ...
+		"simData.plant.control", "simData.plant.controlOutput", "simData.flatOutput", ...
+		"blub.apfelsaft", "bli.blub.bla", "sonnen.schein", "sonne", "blub.asdf.blub.asdf"];
+	
+	myStruct = struct();
+	for thisFieldName = fieldNames
+		myStruct = misc.setfield(myStruct, thisFieldName, rand(1));
+	end
+ 	fieldNamesFound = misc.fieldnames(myStruct);
+	tc.verifyEmpty(setdiff(fieldNames, fieldNamesFound));
+end % testFieldnames()
+
 function testPlace(tc)
 A = magic(2);
 B = ones(2, 1);