cell dictionary assignment workaround for 22b

Author: aylindmello

toolbox/+matlab/+io/+config/+internal/+read/expand.m

@@ -99,7 +99,7 @@
                 if isempty(meta)
                     meta = makeDefaultMetadata(format);
                 end
-                meta.Keys{cs.Keys(i)} = styleStructToMetadata(cs.KeyStyles{i}, format);
+                meta.Keys = matlab.io.config.internal.assignCellDictionaryKey(meta.Keys, cs.Keys(i), styleStructToMetadata(cs.KeyStyles{i}, format));
             end
         end
     end

toolbox/+matlab/+io/+config/+internal/+write/compact.m

@@ -74,7 +74,7 @@
 
         if hasMetadata && ~isa(val, 'matlab.io.config.ConfigurationData') ...
                 && isKey(meta.Keys, k(i))
-            keyStyles{i} = metadataToStyleStruct(meta.Keys{k(i)}, format);
+            keyStyles{i} = metadataToStyleStruct(matlab.io.config.internal.lookupCellDictionaryKey(meta.Keys, k(i)), format);
         end
     end
 

toolbox/+matlab/+io/+config/+internal/assignCellDictionaryKey.m

@@ -0,0 +1,5 @@
+function d = assignCellDictionaryKey(d, key, value)
+    %ASSIGNCELLDICTIONARYKEY Assign a value into a string-to-cell dictionary.
+    %   R2022b dictionaries lack brace indexing; this provides a compatible wrap-and-assign.
+    d(key) = {value};
+end

toolbox/+matlab/+io/+config/@ConfigurationData/getformat.m

@@ -60,7 +60,7 @@
 
     if ~isempty(currentObj.Metadata) && isConfigured(currentObj.Metadata.Keys) ...
             && isKey(currentObj.Metadata.Keys, resolved)
-        meta = currentObj.Metadata.Keys{resolved};
+        meta = matlab.io.config.internal.lookupCellDictionaryKey(currentObj.Metadata.Keys, resolved);
         return;
     end
 

toolbox/+matlab/+io/+config/@ConfigurationData/setformat.m

@@ -62,11 +62,11 @@
         obj.Metadata = makeMetadata(obj);
     end
     if ~isConfigured(obj.Metadata.Keys) || ~isKey(obj.Metadata.Keys, resolved)
-        obj.Metadata.Keys{resolved} = makeMetadata(obj);
+        obj.Metadata.Keys = matlab.io.config.internal.assignCellDictionaryKey(obj.Metadata.Keys, resolved, makeMetadata(obj));
     end
-    meta = obj.Metadata.Keys{resolved};
+    meta = matlab.io.config.internal.lookupCellDictionaryKey(obj.Metadata.Keys, resolved);
     meta = applyProperties(meta, nvargs);
-    obj.Metadata.Keys{resolved} = meta;
+    obj.Metadata.Keys = matlab.io.config.internal.assignCellDictionaryKey(obj.Metadata.Keys, resolved, meta);
 end
 
 function obj = setNestedKey(obj, parts, nvargs)