Fix issue with assigning default values to user types breaking the heap

- Fix issue with assigning default values on user-defined types using the user defined type to assign to the heap which would put the wrong type into the heap and die in game.

Author: MerlinVR

Assets/UdonSharp/Editor/UdonSharpCompilationModule.cs

@@ -27,6 +27,8 @@ public class CompilationModule
 
         public HashSet<FieldDeclarationSyntax> fieldsWithInitializers;
 
+        public ClassDefinition compiledClassDefinition = null;
+
         public int ErrorCount { get; private set; } = 0;
 
         public CompilationModule(UdonSharpProgramAsset sourceAsset)
@@ -133,6 +135,8 @@ public int Compile(List<ClassDefinition> classDefinitions)
 
             if (errorCount == 0)
             {
+                compiledClassDefinition = classDefinitions.Where(e => e.userClassType == visitor.visitorContext.behaviourUserType).FirstOrDefault();
+
                 Profiler.BeginSample("Build assembly");
                 string dataBlock = BuildHeapDataBlock();
                 string codeBlock = visitor.GetCompiledUasm();

Assets/UdonSharp/Editor/UdonSharpCompiler.cs

@@ -196,16 +196,28 @@ private int RunFieldInitalizers(CompilationModule[] compiledModules)
                     bool isConst = fieldDeclarationSyntax.Modifiers.Any(t => t.ToString() == "const");
                     foreach (var variable in fieldDeclarationSyntax.Declaration.Variables)
                     {
+                        FieldDefinition fieldDef = module.compiledClassDefinition?.fieldDefinitions?.Find(e => (e.fieldSymbol.declarationType == SymbolDeclTypeFlags.Private || e.fieldSymbol.declarationType == SymbolDeclTypeFlags.Public) &&
+                                                                                                                e.fieldSymbol.symbolOriginalName == variable.Identifier.ToString());
+
+                        string typeQualifiedName = type.ToString();
+                        if (fieldDef != null)
+                        {
+                            if (fieldDef.fieldSymbol.symbolCsType.Namespace.Length == 0)
+                                typeQualifiedName = fieldDef.fieldSymbol.symbolCsType.Name;
+                            else
+                                typeQualifiedName = fieldDef.fieldSymbol.symbolCsType.Namespace + "." + fieldDef.fieldSymbol.symbolCsType.Name;
+                        }
+
                         if (variable.Initializer != null)
                         {
                             string name = variable.Identifier.ToString();
                             if (isConst)
                             {
-                                _class.Members.Add(new CodeSnippetTypeMember($"const {type} {name} {variable.Initializer};"));
+                                _class.Members.Add(new CodeSnippetTypeMember($"const {typeQualifiedName} {name} {variable.Initializer};"));
                             }
                             else
                             {
-                                method.Statements.Add(new CodeSnippetStatement($"{type} {name} {variable.Initializer};"));
+                                method.Statements.Add(new CodeSnippetStatement($"{typeQualifiedName} {name} {variable.Initializer};"));
                             }
 
                             method.Statements.Add(new CodeSnippetStatement(