Daily update on 20250302-043034 by Nitload Youmu.

Signed-off-by: Nitload <YoumuLiu_NSI@whv0t.onmicrosoft.com>

StgSharp.Script/Express/ExpAstNode/ExpBaseNode.cs

@@ -116,6 +116,11 @@ namespace StgSharp.Script.Express
             return new ExpNodeNextEnumerator( this );
         }
 
+        public static bool IsNullOrEmpty( ExpBaseNode node )
+        {
+            return  node == ExpEmptyNode._only || node == null;
+        }
+
         public static bool VerifyTypeConvertable(
                                    ExpBaseNode left,
                                    ExpBaseNode right )
@@ -149,8 +154,7 @@ namespace StgSharp.Script.Express
 
             public override ExpBaseNode Right => _only;
 
-            public override IExpElementSource EqualityTypeConvert => throw new NotImplementedException(
-                );
+            public override ExpInstantiableElementBase EqualityTypeConvert => ExpInstantiableElementBase.Void;
 
         }
 

StgSharp.Script/Express/ExpAstNode/ExpBinaryOperatorNode.cs

@@ -42,7 +42,7 @@ namespace StgSharp.Script.Express
 
         private ExpBaseNode _left;
         private ExpBaseNode _right;
-        private ExpTypeSource _returnType;
+        private ExpInstantiableElementBase _returnType;
 
         public ExpBinaryOperatorNode( string name ) : base( name, null! ) { }
 
@@ -66,7 +66,7 @@ namespace StgSharp.Script.Express
 
         public override ExpBaseNode Right => _right;
 
-        public override IExpElementSource EqualityTypeConvert => _returnType;
+        public override ExpInstantiableElementBase EqualityTypeConvert => _returnType;
 
         public static ExpBinaryOperatorNode Add(
                                                     ExpBaseNode left,
@@ -87,6 +87,23 @@ namespace StgSharp.Script.Express
             };
         }
 
+        public static ExpBinaryOperatorNode Assign(
+                                                    ExpBaseNode left,
+                                                    ExpBaseNode right )
+        {
+            if( left.EqualityTypeConvert != right.EqualityTypeConvert ) {
+                throw new ExpInvalidTypeException(
+                    left.EqualityTypeConvert.Name,
+                    right.EqualityTypeConvert.Name );
+            }
+            return new ExpBinaryOperatorNode( ExpCompile.KeyWord.Assignment )
+            {
+                _returnType = ExpTypeSource.,
+                _nodeFlag = ExpNodeFlag.Operator_Binary | left._nodeFlag,
+                CodeConvertTemplate = "{0} & {1}",
+            };
+        }
+
         public static ExpBinaryOperatorNode Div(
                                                     ExpBaseNode left,
                                                     ExpBaseNode right )

StgSharp.Script/Express/ExpAstNode/ExpFunctionCallingNode.cs

@@ -52,7 +52,7 @@ namespace StgSharp.Script.Express
         {
             _parameter = firstParameter;
             if( !context.TryGetFunction( functionName, out _function ) ) {
-                foreach( var item in context. ) { }
+                foreach( var item in context.  ) { }
             }
         }
 
@@ -60,7 +60,7 @@ namespace StgSharp.Script.Express
 
         public override ExpBaseNode Right => _parameter;
 
-        public override IExpElementSource EqualityTypeConvert => throw new NotImplementedException(
+        public override ExpInstantiableElementBase EqualityTypeConvert => throw new NotImplementedException(
             );
 
     }

StgSharp.Script/Express/ExpAstNode/ExpLiteralGenericNode.cs

@@ -93,7 +93,7 @@ namespace StgSharp.Script.Express
             }
         }
 
-        public override ExpBaseNode Left => ExpBaseNode;
+        public override ExpBaseNode Left => Empty;
 
         public override ExpBaseNode Right => throw new NotImplementedException();