1 files changed, 121 insertions, 0 deletions

diff --git a/src/WixToolset.Data/IntermediateSymbolExtensions.cs b/src/WixToolset.Data/IntermediateSymbolExtensions.cs
new file mode 100644
index 00000000..10f0d7f0
--- /dev/null
+++ b/src/WixToolset.Data/IntermediateSymbolExtensions.cs
@@ -0,0 +1,121 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Data
+{
+    public static class IntermediateSymbolExtensions
+    {
+        public static bool AsBool(this IntermediateSymbol symbol, int index) => symbol?.Fields[index].AsBool() ?? false;
+
+        public static bool? AsNullableBool(this IntermediateSymbol symbol, int index) => symbol?.Fields[index].AsNullableBool();
+
+        public static int AsNumber(this IntermediateSymbol symbol, int index) => symbol?.Fields[index].AsNumber() ?? 0;
+
+        public static int? AsNullableNumber(this IntermediateSymbol symbol, int index) => symbol?.Fields[index].AsNullableNumber();
+
+        public static string AsString(this IntermediateSymbol symbol, int index) => symbol?.Fields[index].AsString();
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, bool value)
+        {
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, bool? value)
+        {
+            if (value == null && NoFieldMetadata(symbol, index))
+            {
+                return symbol.Fields[index] = null;
+            }
+
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, long value)
+        {
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, long? value)
+        {
+            if (value == null && NoFieldMetadata(symbol, index))
+            {
+                return symbol.Fields[index] = null;
+            }
+
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, int value)
+        {
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, int? value)
+        {
+            if (value == null && NoFieldMetadata(symbol, index))
+            {
+                return symbol.Fields[index] = null;
+            }
+
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, IntermediateFieldPathValue value)
+        {
+            if (value?.Path == null && value?.BaseUri == null && NoFieldMetadata(symbol, index))
+            {
+                return symbol.Fields[index] = null;
+            }
+
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        public static IntermediateField Set(this IntermediateSymbol symbol, int index, string value)
+        {
+            if (value == null && NoFieldMetadata(symbol, index))
+            {
+                return symbol.Fields[index] = null;
+            }
+
+            var definition = symbol.Definition.FieldDefinitions[index];
+
+            var field = symbol.Fields[index].Set(definition, value);
+
+            return symbol.Fields[index] = field;
+        }
+
+        private static bool NoFieldMetadata(IntermediateSymbol symbol, int index)
+        {
+            var field = symbol?.Fields[index];
+
+            return field?.Context == null && field?.PreviousValue == null;
+        }
+    }
+}