fixes failures on expression-bodied constructors

Packages/com.merlin.UdonSharp/Editor/Compiler/Binder/BinderSyntaxVisitor.cs

@@ -244,6 +244,16 @@ public override BoundNode VisitThrowExpression(ThrowExpressionSyntax node)
             throw new NotSupportedException("UdonSharp does not support throwing exceptions since Udon does not have support for exception throwing at the moment", node);
         }
 
+        public override BoundNode VisitConstructorDeclaration(ConstructorDeclarationSyntax node)
+        {
+            if (node.ExpressionBody is ArrowExpressionClauseSyntax arrowExpressionClause)
+            {
+                return VisitArrowExpressionClause(arrowExpressionClause);
+            }
+
+            return VisitBlock(node.Body);
+        }
+
         public override BoundNode VisitArrowExpressionClause(ArrowExpressionClauseSyntax node)
         {
             return VisitExpression(node.Expression);

Packages/com.merlin.UdonSharp/Editor/Compiler/Binder/Symbols/MethodSymbol.cs

@@ -204,7 +204,7 @@ public override void Bind(BindContext context)
             }
             else if (declaringSyntax is ConstructorDeclarationSyntax constructorDeclaration)
             {
-                MethodBody = bodyVisitor.Visit(constructorDeclaration.Body);
+                MethodBody = bodyVisitor.VisitConstructorDeclaration(constructorDeclaration);
             }
             else
             {

Packages/com.merlin.UdonSharp/Runtime/UdonSharpRuntimeUtils.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Runtime.CompilerServices;
 using System.Security.Cryptography;
 using System.Text;
@@ -11,28 +11,34 @@ namespace Internal
     {
         public static class UdonSharpInternalUtility
         {
-            public static long GetTypeID(System.Type type)
+            public static long GetTypeID(Type type)
             {
                 return GetTypeID(type.FullName);
             }
-            
-            public static long GetTypeID(string typeName)
+
+            public static long GetTypeID(string fullTypeName)
             {
-                SHA256 typeHash = new SHA256CryptoServiceProvider();
-                byte[] hash = typeHash.ComputeHash(Encoding.UTF8.GetBytes(typeName));
-                return BitConverter.ToInt64(hash, 0);
+                // the documentation recommends against utilizing SHA256CryptoServiceProvider
+                // but the Create method of the base type instead.
+
+                // the 'using' keyword is to make sure the SHA256 object is disposed at the end of scope.
+                using SHA256 sha = SHA256.Create();
+
+                byte[] hash = sha.ComputeHash(Encoding.UTF8.GetBytes(fullTypeName));
+
+                return BitConverter.ToInt64(hash);
             }
 
-            public static string GetTypeName(System.Type type)
+            public static string GetTypeName(Type type)
             {
                 return type.Name;
             }
-            
+
             public static bool IsUserDefinedType<T>()
             {
                 throw new InvalidOperationException("This method can only be called in the Udon runtime");
             }
-            
+
             /// <summary>
             /// Checks if the type T is a user-defined type with an overridden Equals method.
             /// </summary>
@@ -52,25 +58,25 @@ public static long GetTypeID<T>()
         }
 
         // These may be extended in the future to handle the edge cases with type names
-        public static string GetTypeName(System.Type type)
+        public static string GetTypeName(Type type)
         {
-            return Internal.UdonSharpInternalUtility.GetTypeID(type);
+            return Internal.UdonSharpInternalUtility.GetTypeName(type);
         }
 
-        //public static string GetTypeNamespace(System.Type type)
-        //{
-        //    return type.Namespace;
-        //}
+        /*public static string GetTypeNamespace(Type type)
+        {
+            return type.Namespace;
+        }*/
 
         // Placeholder stubs, won't give valid info unless used in the Udon runtime
         public static int GetUdonScriptVersion()
         {
             return 0;
         }
 
-        public static System.DateTime GetLastCompileDate()
+        public static DateTime GetLastCompileDate()
         {
-            return System.DateTime.Now;
+            return DateTime.Now;
         }
 
         public static string GetCompilerVersionString()