新增UndefinedIdentifiersAsStrings

ExpressionElements/MemberElements/FunctionCall.cs

@@ -218,11 +218,15 @@ namespace Flee.ExpressionElements.MemberElements
                 return;
             }
 
+            // 允许void返回类型的函数，将其返回值视为0
+            // Void return type functions are allowed and treated as returning 0
+            /*
             // Any function reference in an expression must return a value
             if (object.ReferenceEquals(this.Method.ReturnType, typeof(void)))
             {
                 base.ThrowCompileException("FunctionHasNoReturnValue", CompileExceptionReason.FunctionHasNoReturnValue, MyName);
             }
+            */
         }
 
         public override void Emit(FleeILGenerator ilg, IServiceProvider services)
@@ -342,7 +346,21 @@ namespace Flee.ExpressionElements.MemberElements
                 this.EmitParamArrayArguments(parameters, elements, ilg, services);
             }
 
-            MemberElement.EmitMethodCall(this.ResultType, nextRequiresAddress, this.Method, ilg);
+            // 检查方法是否返回void
+            bool isVoidMethod = object.ReferenceEquals(this.Method.ReturnType, typeof(void));
+            
+            if (isVoidMethod)
+            {
+                // 对于void方法，使用原始的ReturnType调用方法，然后将0压入栈
+                MemberElement.EmitMethodCall(this.Method.ReturnType, nextRequiresAddress, this.Method, ilg);
+                // 将0压入栈作为返回值
+                ilg.Emit(OpCodes.Ldc_I4_0);
+            }
+            else
+            {
+                // 对于非void方法，正常调用
+                MemberElement.EmitMethodCall(this.ResultType, nextRequiresAddress, this.Method, ilg);
+            }
         }
 
         private void EmitExtensionFunctionInternal(ParameterInfo[] parameters, ExpressionElement[] elements, FleeILGenerator ilg, IServiceProvider services)
@@ -397,6 +415,12 @@ namespace Flee.ExpressionElements.MemberElements
                 }
                 else
                 {
+                    // 如果方法返回void，将其视为返回int类型（值为0）
+                    // If method returns void, treat it as returning int (value 0)
+                    if (object.ReferenceEquals(this.Method.ReturnType, typeof(void)))
+                    {
+                        return typeof(int);
+                    }
                     return this.Method.ReturnType;
                 }
             }