1.新增context内置变量2.修复一些问题

DoRunner/BackpointRunner.cs

@@ -0,0 +1,26 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class BackpointRunner : JumpRuntimePointerRunner
+    {
+        [return: MaybeNull]
+        public override object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 检查并跳转到上次跳转的位置
+            if (parser.Evaluate<bool>(sentence.content))
+            {
+                if (context.GotoPointerStack.Count == 0)
+                {
+                    throw new RScriptRuntimeException($"No position to back.", context.CurrentRuntimePointer);
+                }
+                else
+                {
+                    DoJumpRuntimePointer(parser, context.GotoPointerStack.Pop(), context);
+                }
+            }
+            return null;
+        }
+    }
+}

DoRunner/BreakpointRunner.cs

@@ -0,0 +1,32 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript
+{
+    public class BreakpointRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 检查并跳转到当前命名空间的结束位置
+            if (parser.Evaluate<bool>(sentence.content))
+            {
+                if (context.RuntimePointerStack.Count == 0)
+                {
+                    context.CurrentRuntimePointer = context.Sentences.Length;
+                }
+                else if (context.NamespaceLayer.TryGetValue(context.RuntimePointerStack.Peek(), out var exitPointer))
+                {
+                    context.CurrentRuntimePointer = exitPointer;
+                    //DoExitNamespace(parser);
+                    context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
+                }
+                else
+                {
+                    throw new RScriptRuntimeException($"No namespace to break.", context.CurrentRuntimePointer);
+                }
+            }
+            return null;
+        }
+    }
+}

DoRunner/DefineVariableRunner.cs

@@ -0,0 +1,67 @@
+using Convention.RScript.Parser;
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class DefineVariableRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 定义变量
+            var varTypeName = sentence.info[0];
+            var varName = sentence.info[1];
+            var varInitExpression = sentence.info[2];
+            Type varType;
+            object varDefaultValue;
+            {
+                if (varTypeName == "string")
+                {
+                    varType = typeof(string);
+                    varDefaultValue = varInitExpression == null ? string.Empty : varInitExpression;
+                }
+                else if (varTypeName == "int")
+                {
+                    varType = typeof(int);
+                    varDefaultValue = varInitExpression == null ? 0 : parser.Evaluate<int>(varInitExpression);
+                }
+                else if (varTypeName == "double")
+                {
+                    varType = typeof(double);
+                    varDefaultValue = varInitExpression == null ? 0.0 : parser.Evaluate<double>(varInitExpression);
+                }
+                else if (varTypeName == "float")
+                {
+                    varType = typeof(float);
+                    varDefaultValue = varInitExpression == null ? 0.0f : parser.Evaluate<float>(varInitExpression);
+                }
+                else if (varTypeName == "bool")
+                {
+                    varType = typeof(bool);
+                    varDefaultValue = varInitExpression == null ? false : parser.Evaluate<bool>(varInitExpression);
+                }
+                else if (varTypeName == "var")
+                {
+                    varType = typeof(object);
+                    varDefaultValue = varInitExpression == null ? new object() : parser.Evaluate(varInitExpression);
+                }
+                else
+                {
+                    throw new RScriptRuntimeException($"Unsupported variable type '{varTypeName}'.", context.CurrentRuntimePointer);
+                }
+            }
+            if (context.CurrentLocalSpaceVariableNames.Peek().Contains(varName) == false)
+            {
+                context.Variables.Add(varName, new(varType, varDefaultValue));
+                parser.context.Variables[varName] = varDefaultValue;
+                context.CurrentLocalSpaceVariableNames.Peek().Add(varName);
+            }
+            else
+            {
+                throw new RScriptRuntimeException($"Variable '{varName}' already defined on this namespace.", context.CurrentRuntimePointer);
+            }
+            return null;
+        }
+    }
+}

DoRunner/EnterNamedSpaceRunner.cs

@@ -0,0 +1,15 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class EnterNamedSpaceRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            context.CurrentRuntimePointer = context.NamespaceLayer[context.NamespaceLabels[sentence.content]];
+            return null;
+        }
+    }
+}

DoRunner/EnterNamespaceRunner.cs

@@ -0,0 +1,23 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class EnterNamespaceRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 准备记录当前命名空间中定义的变量, 清空上层命名空间的变量
+            context.CurrentLocalSpaceVariableNames.Push(new());
+            // 更新变量值
+            foreach (var (varName, varValue) in parser.context.Variables)
+            {
+                context.Variables.SetValue(varName, varValue);
+            }
+            // 压栈
+            context.RuntimePointerStack.Push(context.CurrentRuntimePointer);
+            return null;
+        }
+    }
+}

DoRunner/ExitNamespaceRunner.cs

@@ -0,0 +1,28 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class ExitNamespaceRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 移除当前命名空间的变量
+            foreach (var local in context.CurrentLocalSpaceVariableNames.Peek())
+            {
+                context.Variables.Remove(local);
+                parser.context.Variables.Remove(local);
+            }
+            // 还原上层命名空间的变量
+            foreach (var local in context.CurrentLocalSpaceVariableNames.Peek())
+            {
+                parser.context.Variables[local] = context.Variables[local].data;
+            }
+            context.CurrentLocalSpaceVariableNames.Pop();
+            // 弹栈
+            context.RuntimePointerStack.Pop();
+            return null;
+        }
+    }
+}

DoRunner/ExpressionRunner.cs

@@ -0,0 +1,14 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class ExpressionRunner : IRSentenceRunner
+    {
+        [return: MaybeNull]
+        public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            return parser.Evaluate(sentence.content);
+        }
+    }
+}

DoRunner/GoToRunner.cs

@@ -0,0 +1,47 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public class GoToRunner : JumpRuntimePointerRunner
+    {
+        [return: MaybeNull]
+        public override object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
+        {
+            // 检查并跳转到指定标签
+            if (parser.Evaluate<bool>(sentence.info[0]))
+            {
+                if (context.Labels.TryGetValue(sentence.content, out var labelPointer))
+                {
+                    context.GotoPointerStack.Push(context.CurrentRuntimePointer);
+                    DoJumpRuntimePointer(parser, labelPointer, context);
+                }
+                else if (context.NamespaceLabels.TryGetValue(sentence.content, out labelPointer))
+                {
+                    int current = context.CurrentRuntimePointer;
+                    //DoEnterNamespace(parser);
+                    context.SentenceRunners[RScriptSentence.Mode.EnterNamespace].Run(parser, context.CurrentSentence, context);
+                    context.CurrentRuntimePointer = labelPointer;
+                    for (int e = context.NamespaceLayer[context.NamespaceLabels[sentence.content]]; ;)
+                    {
+                        context.RunNextStep(parser);
+                        if (context.CurrentRuntimePointer >= context.Sentences.Length)
+                            break;
+                        else if (context.CurrentRuntimePointer == e)
+                            break;
+                        else
+                            context.CurrentRuntimePointer++;
+                    }
+                    //context.DoExitNamespace(parser);
+                    context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
+                    context.CurrentRuntimePointer = current;
+                }
+                else
+                {
+                    throw new RScriptRuntimeException($"Label '{sentence.content}' not found.", context.CurrentRuntimePointer);
+                }
+            }
+            return null;
+        }
+    }
+}

DoRunner/JumpRuntimePointerRunner.cs

@@ -0,0 +1,65 @@
+using Convention.RScript.Parser;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Convention.RScript.Runner
+{
+    public abstract class JumpRuntimePointerRunner : IRSentenceRunner
+    {
+        protected static void DoJumpRuntimePointer(ExpressionParser parser, int target, RScriptContext context)
+        {
+            bool isForwardMove = target > context.CurrentRuntimePointer;
+            int step = isForwardMove ? 1 : -1;
+            int insLayer = 0;
+            for (; context.CurrentRuntimePointer != target; context.CurrentRuntimePointer += step)
+            {
+                if (context.CurrentSentence.mode == RScriptSentence.Mode.ExitNamespace)
+                {
+                    if (isForwardMove)
+                    {
+                        if (insLayer > 0)
+                            insLayer--;
+                        else
+                        {
+                            for (int disLayer = -insLayer; disLayer > 0; disLayer--)
+                                context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
+                        }
+                    }
+                    else
+                        insLayer++;
+                }
+                else if (context.CurrentSentence.mode == RScriptSentence.Mode.EnterNamespace)
+                {
+                    if (isForwardMove)
+                        insLayer++;
+                    else
+                    {
+                        if (insLayer > 0)
+                            insLayer--;
+                        else
+                        {
+                            for (int disLayer = -insLayer; disLayer > 0; disLayer--)
+                                context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
+                        }
+                    }
+                }
+                if (insLayer > 0)
+                {
+                    for (; insLayer > 0; insLayer--)
+                    {
+                        context.SentenceRunners[RScriptSentence.Mode.EnterNamespace].Run(parser, context.CurrentSentence, context);
+                    }
+                }
+                else if (insLayer < 0)
+                {
+                    for (; insLayer < 0; insLayer++)
+                    {
+                        context.SentenceRunners[RScriptSentence.Mode.ExitNamespace].Run(parser, context.CurrentSentence, context);
+                    }
+                }
+            }
+        }
+
+        [return: MaybeNull]
+        public abstract object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context);
+    }
+}

Matcher/DefineVariableMatcher.cs

@@ -4,15 +4,28 @@ namespace Convention.RScript.Matcher
 {
     public class DefineVariableMatcher : IRSentenceMatcher
     {
+        private readonly Regex DefineVariableRegex = new(@"(string|int|double|float|bool|var)\s+([a-zA-Z_][a-zA-Z0-9_]*)\s*=\s*(.+)");
+        private readonly Regex DeclareVariableRegex = new(@"(string|int|double|float|bool|var)\s+([a-zA-Z_][a-zA-Z0-9_]*)");
+
         public bool Match(string expression, ref RScriptSentence sentence)
         {
-            Regex DefineVariableRegex = new(@"(string|int|double|float|bool|var)\s+([a-zA-Z_][a-zA-Z0-9_]*)");
-            var DefineVariableMatch = DefineVariableRegex.Match(expression);
-            if (DefineVariableMatch.Success)
             {
-                sentence.mode = RScriptSentence.Mode.DefineVariable;
-                sentence.info = new() { DefineVariableMatch.Groups[1].Value, DefineVariableMatch.Groups[2].Value };
-                return true;
+                var DefineVariableMatch = DefineVariableRegex.Match(expression);
+                if (DefineVariableMatch.Success)
+                {
+                    sentence.mode = RScriptSentence.Mode.DefineVariable;
+                    sentence.info = new() { DefineVariableMatch.Groups[1].Value, DefineVariableMatch.Groups[2].Value, DefineVariableMatch.Groups[3].Value };
+                    return true;
+                }
+            }
+            {
+                var DeclareVariableMatch = DeclareVariableRegex.Match(expression);
+                if (DeclareVariableMatch.Success)
+                {
+                    sentence.mode = RScriptSentence.Mode.DefineVariable;
+                    sentence.info = new() { DeclareVariableMatch.Groups[1].Value, DeclareVariableMatch.Groups[2].Value, null };
+                    return true;
+                }
             }
             return false;
         }

Matcher/NamespaceMater.cs

@@ -1,4 +1,6 @@
-namespace Convention.RScript.Matcher
+using System.Text.RegularExpressions;
+
+namespace Convention.RScript.Matcher
 {
     public class NamespaceMater : IRSentenceMatcher
     {
@@ -14,6 +16,21 @@
                 sentence.mode = RScriptSentence.Mode.ExitNamespace;
                 return true;
             }
+            else if (expression.StartsWith("namespace"))
+            {
+                sentence.mode = RScriptSentence.Mode.NamedSpace;
+                Regex regex = new(@"namespace\s*\(([a-zA-Z_][a-zA-Z0-9_]*)\)");
+                var match = regex.Match(expression);
+                if (match.Success)
+                {
+                    sentence.content = match.Groups[1].Value;
+                    return true;
+                }
+                else
+                {
+                    throw new RScriptRuntimeException("Invalid namespace declaration", -1);
+                }
+            }
             return false;
         }
     }

Parser/ExpressionParser.cs

@@ -1,12 +1,62 @@
 using Flee.PublicTypes;
-using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace Convention.RScript.Parser
+namespace Convention.RScript
 {
+    public static class ExpressionMath
+    {
+        public static int Sign(double value, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            if (value.IsCloseToZero(accuracy))
+                return 0;
+            return value > 0 ? 1 : -1;
+        }
+
+        public static int Compare(double value1, double value2, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            if (value1.IsClose(value2, accuracy))
+                return 0;
+            return value1 > value2 ? 1 : -1;
+        }
+
+        public static bool IsBetween(double value, double minValue, double maxValue, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            return Compare(value, minValue, accuracy) >= 0 && Compare(value, maxValue, accuracy) <= 0;
+        }
+
+        public static bool IsBetweenExclusive(double value, double minValue, double maxValue, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            return Compare(value, minValue, accuracy) > 0 && Compare(value, maxValue, accuracy) < 0;
+        }
+
+        public static int ToInt(double value)
+        {
+            return (int)value;
+        }
+
+        public static int ToInt(float value)
+        {
+            return (int)value;
+        }
+        public static int ToInt(int value)
+        {
+            return (int)value;
+        }
+
+        public static double ToDouble(float value)
+        {
+            return (double)value;
+        }
+
+        public static double ToDouble(int value)
+        {
+            return (double)value;
+        }
+        public static double ToDouble(double value)
+        {
+            return (double)value;
+        }
+    }
     public static class ExpressionExtension
     {
         public const double DefaultDoubleAccuracy = 1e-7;
@@ -32,7 +82,10 @@ namespace Convention.RScript.Parser
             return !(double.IsInfinity(value) || double.IsNaN(value) || value > maximumAbsoluteError || value < -maximumAbsoluteError);
         }
     }
+}
 
+namespace Convention.RScript.Parser
+{
     public class ExpressionParser
     {
         public readonly ExpressionContext context;

PublicTypes/RScriptException.cs

@@ -2,10 +2,26 @@
 
 namespace Convention.RScript
 {
+
 	[Serializable]
 	public class RScriptException : Exception
 	{
-		public RScriptException(string message, int runtimePointer) : base($"when running {runtimePointer}, {message}") { }
-		public RScriptException(string message, int runtimePointer, Exception inner) : base($"when running {runtimePointer}, {message}", inner) { }
+		public RScriptException() { }
+		public RScriptException(string message) : base(message) { }
+		public RScriptException(string message, Exception inner) : base(message, inner) { }
 	}
+
+	[Serializable]
+	public class RScriptRuntimeException : RScriptException
+    {
+		public RScriptRuntimeException(string message, int runtimePointer) : base($"when running {runtimePointer}, {message}") { }
+		public RScriptRuntimeException(string message, int runtimePointer, Exception inner) : base($"when running {runtimePointer}, {message}", inner) { }
+	}
+
+    [Serializable]
+    public class RScriptCompileException : RScriptException
+    {
+        public RScriptCompileException(string message, int line, int chIndex) : base($"when compile on line {line} char {chIndex}, {message}") { }
+        public RScriptCompileException(string message, int line, int chIndex, Exception inner) : base($"when compile on line {line} char {chIndex}, {message}", inner) { }
+    }
 }

PublicTypes/RScriptVariables.cs

@@ -11,7 +11,33 @@ namespace Convention.RScript
     public struct RScriptVariableEntry
     {
         public Type type;
-        public object data;
+        public object data
+        {
+            readonly get
+            {
+                return internalData;
+            }
+            set
+            {
+                if (type == null)
+                {
+                    type = value.GetType();
+                    internalData = value;
+                    return;
+                }
+                if (type == typeof(object) || type == value.GetType())
+                    internalData = value;
+                else
+                    internalData = Convert.ChangeType(value, type);
+            }
+        }
+        private object internalData;
+
+        public RScriptVariableEntry(Type type, object data) : this()
+        {
+            this.type = type;
+            this.data = data;
+        }
     }
     public class RScriptVariables : IDictionary<string, RScriptVariableEntry>
     {

RScriptContext.cs

@@ -1,8 +1,10 @@
 using Convention.RScript.Matcher;
 using Convention.RScript.Parser;
+using Convention.RScript.Runner;
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 
 namespace Convention.RScript
@@ -16,7 +18,7 @@ namespace Convention.RScript
             /// </summary>
             Expression,
             /// <summary>
-            /// 定义变量, 格式: 类型 变量名
+            /// 定义变量, 格式: 类型 变量名 [=Expression]
             /// <para>类型支持: string, int, double, float, bool, var</para>
             /// <para>每层命名空间中不可重复定义变量, 不可使用未定义的变量, 不存在时会自动向上查找上级空间的变量</para>
             /// </summary>
@@ -32,11 +34,11 @@ namespace Convention.RScript
             /// </summary>
             ExitNamespace,
             /// <summary>
-            /// 标签, 格式: label(labelname)
+            /// 标签, 格式: label(labelname);
             /// </summary>
             Label,
             /// <summary>
-            /// 跳转到指定标签, 格式: goto(boolean,labelname)
+            /// 跳转到指定标签, 格式: goto(boolean,labelname);
             /// <para>判断为真时跳转到labelname</para>
             /// </summary>
             Goto,
@@ -48,11 +50,20 @@ namespace Convention.RScript
             /// 跳转到上次跳转的位置的后一个位置, 格式: back(boolean);
             /// </summary>
             Backpoint,
+            /// <summary>
+            /// 命名空间命名, 格式: namespace(labelname){}
+            /// </summary>
+            NamedSpace,
         }
 
         public string content;
         public List<string> info;
         public Mode mode;
+
+        public override string ToString()
+        {
+            return $"{mode.ToString()}/: {content}";
+        }
     }
 
     public interface IRSentenceMatcher
@@ -60,13 +71,19 @@ namespace Convention.RScript
         bool Match(string expression, ref RScriptSentence sentence);
     }
 
+    public interface IRSentenceRunner
+    {
+        [return: MaybeNull] object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context);
+    }
+
     public partial class RScriptContext
     {
         public readonly RScriptImportClass Import;
         public readonly RScriptVariables Variables;
-        private readonly RScriptSentence[] Sentences;
-        private readonly Dictionary<string, int> Labels;
-        private readonly Dictionary<int, int> Namespace;
+        internal readonly RScriptSentence[] Sentences;
+        internal readonly Dictionary<string, int> Labels = new();
+        internal readonly Dictionary<int, int> NamespaceLayer = new();
+        internal readonly Dictionary<string, int> NamespaceLabels = new();
 
         public List<IRSentenceMatcher> SentenceParser = new()
         {
@@ -78,6 +95,18 @@ namespace Convention.RScript
             new BackMatcher(),
         };
 
+        public Dictionary<RScriptSentence.Mode, IRSentenceRunner> SentenceRunners = new()
+        {
+            { RScriptSentence.Mode.DefineVariable, new DefineVariableRunner() },
+            { RScriptSentence.Mode.EnterNamespace, new EnterNamespaceRunner() },
+            { RScriptSentence.Mode.ExitNamespace, new ExitNamespaceRunner() },
+            { RScriptSentence.Mode.Goto, new GoToRunner() },
+            { RScriptSentence.Mode.Breakpoint, new BreakpointRunner() },
+            { RScriptSentence.Mode.Backpoint, new BackpointRunner() },
+            { RScriptSentence.Mode.Expression, new ExpressionRunner() },
+            { RScriptSentence.Mode.NamedSpace, new EnterNamedSpaceRunner() },
+        };
+
         private RScriptSentence ParseToSentence(string expression)
         {
             RScriptSentence result = new()
@@ -86,262 +115,126 @@ namespace Convention.RScript
                 mode = RScriptSentence.Mode.Expression
             };
             expression = expression.Trim();
-            expression.TrimEnd(';');
-            SentenceParser.Any(matcher => matcher.Match(expression, ref result));
+            expression = expression.TrimEnd(';');
+            var _ = SentenceParser.Any(matcher => matcher.Match(expression, ref result));
             return result;
         }
 
-        private void BuildUpLabelsAndNamespace(ref Dictionary<string, int> labelIndicator, ref Dictionary<int, int> namespaceIndicator)
+        private void BuildUpLabelsAndNamespace()
         {
             Stack<int> namespaceLayers = new();
+            string namespaceName = "";
             for (int i = 0, e = Sentences.Length; i != e; i++)
             {
-                if (Sentences[i].mode == RScriptSentence.Mode.Label)
+                var sentence = Sentences[i];
+                if (string.IsNullOrEmpty(namespaceName))
                 {
-                    labelIndicator[Sentences[i].content] = i;
+                    if (sentence.mode == RScriptSentence.Mode.Label)
+                    {
+                        this.Labels[Sentences[i].content] = i;
+                    }
+                    else if (sentence.mode == RScriptSentence.Mode.EnterNamespace)
+                    {
+                        namespaceLayers.Push(i);
+                    }
+                    else if (sentence.mode == RScriptSentence.Mode.ExitNamespace)
+                    {
+                        if (namespaceLayers.Count == 0)
+                            throw new RScriptRuntimeException("Namespace exit without enter.", i);
+                        var enterPointer = namespaceLayers.Pop();
+                        this.NamespaceLayer[enterPointer] = i;
+                    }
+                    else if (sentence.mode == RScriptSentence.Mode.NamedSpace)
+                    {
+                        namespaceName = sentence.content;
+                    }
                 }
-                else if (Sentences[i].mode == RScriptSentence.Mode.EnterNamespace)
+                else
                 {
-                    namespaceLayers.Push(i);
-                }
-                else if (Sentences[i].mode == RScriptSentence.Mode.ExitNamespace)
-                {
-                    if (namespaceLayers.Count == 0)
-                        throw new RScriptException("Namespace exit without enter.", i);
-                    var enterPointer = namespaceLayers.Pop();
-                    namespaceIndicator[enterPointer] = i;
+                    if (sentence.mode == RScriptSentence.Mode.EnterNamespace)
+                    {
+                        namespaceLayers.Push(i);
+                        this.NamespaceLabels[namespaceName] = i;
+                        namespaceName = "";
+                    }
+                    else
+                    {
+                        throw new RScriptRuntimeException($"Namespace is invalid", i);
+                    }
                 }
             }
             if (namespaceLayers.Count > 0)
             {
-                throw new RScriptException("Namespace enter without exit.", namespaceLayers.Peek());
+                throw new RScriptRuntimeException("Namespace enter without exit.", namespaceLayers.Peek());
             }
         }
 
-        public RScriptContext(string[] expressions, RScriptImportClass import = null, RScriptVariables variables = null)
+        public class BuildInContext
+        {
+            private RScriptContext context;
+            public BuildInContext(RScriptContext context)
+            {
+                this.context = context;
+            }
+
+            public bool ExistVar(string name)
+            {
+                return context.Variables.ContainsKey(name);
+            }
+
+            public bool ExistNamespace(string name)
+            {
+                return context.NamespaceLabels.ContainsKey(name);
+            }
+
+            public bool ExistLabel(string name)
+            {
+                return context.Labels.ContainsKey(name);
+            }
+        }
+
+        public RScriptContext(string[] expressions,
+                              RScriptImportClass import = null,
+                              RScriptVariables variables = null,
+                              List<IRSentenceMatcher> matcher = null,
+                              Dictionary<RScriptSentence.Mode, IRSentenceRunner> sentenceRunners = null)
         {
             this.Import = import ?? new();
             this.Variables = variables ?? new();
+            this.Variables.Add("context", new(typeof(object), new BuildInContext(this)));
             this.Sentences = (from item in expressions select ParseToSentence(item)).ToArray();
-            this.Labels = new();
-            this.Namespace = new();
-            BuildUpLabelsAndNamespace(ref this.Labels, ref this.Namespace);
-        }
+            if (matcher != null)
+                this.SentenceParser = matcher;
+            if (sentenceRunners != null)
+                this.SentenceRunners = sentenceRunners;
 
+            BuildUpLabelsAndNamespace();
+        }
 
         public RScriptSentence CurrentSentence => Sentences[CurrentRuntimePointer];
 
-        private void DoDefineVariable(ExpressionParser parser, RScriptSentence sentence)
-        {
-            // 定义变量
-            var varTypeName = sentence.info[0];
-            var varName = sentence.info[1];
-            Type varType;
-            object varDefaultValue;
-            {
-                if (varTypeName == "string")
-                {
-                    varType = typeof(string);
-                    varDefaultValue = string.Empty;
-                }
-                else if (varTypeName == "int")
-                {
-                    varType = typeof(int);
-                    varDefaultValue = 0;
-                }
-                else if (varTypeName == "double")
-                {
-                    varType = typeof(double);
-                    varDefaultValue = 0.0;
-                }
-                else if (varTypeName == "float")
-                {
-                    varType = typeof(float);
-                    varDefaultValue = 0.0f;
-                }
-                else if (varTypeName == "bool")
-                {
-                    varType = typeof(bool);
-                    varDefaultValue = false;
-                }
-                else if (varTypeName == "var")
-                {
-                    varType = typeof(object);
-                    varDefaultValue = new object();
-                }
-                else
-                {
-                    throw new RScriptException($"Unsupported variable type '{varTypeName}'.", CurrentRuntimePointer);
-                }
-            }
-            if (CurrentLocalSpaceVariableNames.Peek().Contains(varName) == false)
-            {
-                Variables.Add(varName, new() { type = varType, data = varDefaultValue });
-                parser.context.Variables[varName] = varDefaultValue;
-                CurrentLocalSpaceVariableNames.Peek().Add(varName);
-            }
-            else
-            {
-                throw new RScriptException($"Variable '{varName}' already defined on this namespace.", CurrentRuntimePointer);
-            }
-        }
 
-        private void DoEnterNamespace(ExpressionParser parser)
-        {
-            // 准备记录当前命名空间中定义的变量, 清空上层命名空间的变量
-            CurrentLocalSpaceVariableNames.Push(new());
-            // 更新变量值
-            foreach (var (varName, varValue) in parser.context.Variables)
-            {
-                Variables.SetValue(varName, varValue);
-            }
-            // 压栈
-            RuntimePointerStack.Push(CurrentRuntimePointer);
-        }
-
-        private void DoExitNamespace(ExpressionParser parser)
-        {
-            // 移除当前命名空间的变量
-            foreach (var local in CurrentLocalSpaceVariableNames.Peek())
-            {
-                Variables.Remove(local);
-                parser.context.Variables.Remove(local);
-            }
-            // 还原上层命名空间的变量
-            foreach (var local in CurrentLocalSpaceVariableNames.Peek())
-            {
-                parser.context.Variables[local] = Variables[local].data;
-            }
-            CurrentLocalSpaceVariableNames.Pop();
-            // 弹栈
-            RuntimePointerStack.Pop();
-        }
-
-        private void DoJumpRuntimePointer(ExpressionParser parser, int target)
-        {
-            bool isForwardMove = target > CurrentRuntimePointer;
-            int step = isForwardMove ? 1 : -1;
-            for (; CurrentRuntimePointer != target; CurrentRuntimePointer += step)
-            {
-                if (CurrentSentence.mode == RScriptSentence.Mode.ExitNamespace)
-                {
-                    if (isForwardMove)
-                        DoExitNamespace(parser);
-                    else
-                        DoEnterNamespace(parser);
-                }
-                else if (CurrentSentence.mode == RScriptSentence.Mode.EnterNamespace)
-                {
-                    if (isForwardMove)
-                        DoEnterNamespace(parser);
-                    else
-                        DoExitNamespace(parser);
-                }
-            }
-        }
-
-        private void DoGoto(ExpressionParser parser, RScriptSentence sentence)
-        {
-            // 检查并跳转到指定标签
-            if (parser.Evaluate<bool>(sentence.info[0]))
-            {
-                if (Labels.TryGetValue(sentence.content, out var labelPointer))
-                {
-                    GotoPointerStack.Push(CurrentRuntimePointer);
-                    DoJumpRuntimePointer(parser, labelPointer);
-                }
-                else
-                {
-                    throw new RScriptException($"Label '{sentence.content}' not found.", CurrentRuntimePointer);
-                }
-            }
-        }
-
-        private void DoBreakpoint(ExpressionParser parser, RScriptSentence sentence)
-        {
-            // 检查并跳转到当前命名空间的结束位置
-            if (parser.Evaluate<bool>(sentence.content))
-            {
-                if (RuntimePointerStack.Count == 0)
-                {
-                    CurrentRuntimePointer = Sentences.Length;
-                }
-                else if (Namespace.TryGetValue(RuntimePointerStack.Peek(), out var exitPointer))
-                {
-                    CurrentRuntimePointer = exitPointer;
-                    DoExitNamespace(parser);
-                }
-                else
-                {
-                    throw new NotImplementedException($"No namespace to break.");
-                }
-            }
-        }
-
-        private void DoBackpoint(ExpressionParser parser, RScriptSentence sentence)
-        {
-            // 检查并跳转到上次跳转的位置
-            if (parser.Evaluate<bool>(sentence.content))
-            {
-                if (GotoPointerStack.Count == 0)
-                {
-                    throw new NotImplementedException($"No position to back.");
-                }
-                else
-                {
-                    DoJumpRuntimePointer(parser, GotoPointerStack.Pop());
-                }
-            }
-        }
-
-        private object RunNextStep(ExpressionParser parser)
+        internal object RunNextStep(ExpressionParser parser)
         {
             var sentence = CurrentSentence;
-            switch (sentence.mode)
+            try
             {
-                case RScriptSentence.Mode.Expression:
-                    return parser.Evaluate(sentence.content);
-                case RScriptSentence.Mode.DefineVariable:
-                    {
-                        DoDefineVariable(parser, sentence);
-                    }
-                    break;
-                case RScriptSentence.Mode.EnterNamespace:
-                    {
-                        DoEnterNamespace(parser);
-                    }
-                    break;
-                case RScriptSentence.Mode.ExitNamespace:
-                    {
-                        DoExitNamespace(parser);
-                    }
-                    break;
-                case RScriptSentence.Mode.Goto:
-                    {
-                        DoGoto(parser, sentence);
-                    }
-                    break;
-                case RScriptSentence.Mode.Breakpoint:
-                    {
-                        DoBreakpoint(parser, sentence);
-                    }
-                    break;
-                case RScriptSentence.Mode.Backpoint:
-                    {
-                        DoBackpoint(parser, sentence);
-                    }
-                    break;
-                default:
-                    // Do nothing
-                    break;
+                return SentenceRunners.TryGetValue(sentence.mode, out var runner) ? runner.Run(parser, sentence, this) : null;
+            }
+            catch (RScriptException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                throw new RScriptRuntimeException($"Runtime error: {ex.Message}", CurrentRuntimePointer, ex);
             }
-            return null;
         }
 
-        private readonly Stack<int> RuntimePointerStack = new();
-        private readonly Stack<int> GotoPointerStack = new();
-        private int CurrentRuntimePointer = 0;
-        private readonly Stack<HashSet<string>> CurrentLocalSpaceVariableNames = new();
+        internal readonly Stack<int> RuntimePointerStack = new();
+        internal readonly Stack<int> GotoPointerStack = new();
+        public int CurrentRuntimePointer { get; internal set; } = 0;
+        internal readonly Stack<HashSet<string>> CurrentLocalSpaceVariableNames = new();
 
         public Dictionary<string, RScriptVariableEntry> GetCurrentVariables()
         {
@@ -353,13 +246,26 @@ namespace Convention.RScript
             return result;
         }
 
-        public void Run(ExpressionParser parser)
+        private void BeforeRun(ExpressionParser parser)
         {
             CurrentLocalSpaceVariableNames.Clear();
             RuntimePointerStack.Clear();
             GotoPointerStack.Clear();
             CurrentLocalSpaceVariableNames.Clear();
             CurrentLocalSpaceVariableNames.Push(new());
+            foreach (var staticType in Import)
+            {
+                parser.context.Imports.AddType(staticType);
+            }
+            foreach (var (name,varObject) in Variables)
+            {
+                parser.context.Variables[name] = varObject.data;
+            }
+        }
+
+        public void Run(ExpressionParser parser)
+        {
+            BeforeRun(parser);
             for (CurrentRuntimePointer = 0; CurrentRuntimePointer < Sentences.Length; CurrentRuntimePointer++)
             {
                 RunNextStep(parser);
@@ -374,11 +280,7 @@ namespace Convention.RScript
 
         public IEnumerator RunAsync(ExpressionParser parser)
         {
-            CurrentLocalSpaceVariableNames.Clear();
-            RuntimePointerStack.Clear();
-            GotoPointerStack.Clear();
-            CurrentLocalSpaceVariableNames.Clear();
-            CurrentLocalSpaceVariableNames.Push(new());
+            BeforeRun(parser);
             for (CurrentRuntimePointer = 0; CurrentRuntimePointer < Sentences.Length; CurrentRuntimePointer++)
             {
                 var ret = RunNextStep(parser);

RScriptEngine.cs

@@ -19,82 +19,104 @@ namespace Convention.RScript
             StringBuilder builder = new();
             List<string> statements = new();
 
-            for (int i = 0, e = script.Length; i < e; i++)
+            void PushBuilder()
             {
-                char c = script[i];
-                if (c == ';')
+                if (builder.Length > 0)
                 {
-                    if (builder.Length > 0)
-                    {
-                        statements.Add(builder.ToString().Trim());
-                        builder.Clear();
-                    }
+                    statements.Add(builder.ToString().Trim());
+                    builder.Clear();
                 }
-                else if (c == '/' && i + 1 < e)
+            }
+
+            var lines = script.Split(new[] { "\r\n", "\n" }, StringSplitOptions.None);
+            for (int lineIndex = 0; lineIndex < lines.Length; lineIndex++)
+            {
+                string line = lines[lineIndex];
+                for (int i = 0, e = line.Length; i < e; i++)
                 {
-                    // Skip single-line comment
-                    if (script[i + 1] == '/')
+                    char c = line[i];
+                    if (c == ';')
                     {
-                        while (i < script.Length && script[i] != '\n')
+                        PushBuilder();
+                    }
+                    else if (c == '/' && i + 1 < e)
+                    {
+                        // Skip single-line comment
+                        if (line[i + 1] == '/')
+                        {
+                            while (i < line.Length && line[i] != '\n')
+                                i++;
+                        }
+                        // Skip multi-line comment
+                        else if (line[i + 1] == '*')
+                        {
+                            i += 2;
+                            while (i + 1 < line.Length && !(line[i] == '*' && line[i + 1] == '/'))
+                                i++;
+                            i++;
+                        }
+                        else
+                        {
+                            builder.Append(c);
+                        }
+                    }
+                    else if (c == '#')
+                    {
+                        // Skip single-line comment
+                        while (i < line.Length && line[i] != '\n')
                             i++;
                     }
-                    // Skip multi-line comment
-                    else if (script[i + 1] == '*')
+                    else if (c == '\"')
                     {
-                        i += 2;
-                        while (i + 1 < script.Length && !(script[i] == '*' && script[i + 1] == '/'))
-                            i++;
-                        i++;
+                        builder.Append(c);
+                        for (i++; i < e; i++)
+                        {
+                            builder.Append(line[i]);
+                            if (line[i] == '\"')
+                            {
+                                break;
+                            }
+                            else if (line[i] == '\\')
+                            {
+                                i++;
+                                if (i < e)
+                                    builder.Append(line[i]);
+                                else
+                                    throw new RScriptCompileException("Invalid escape sequence in string literal", lineIndex, i);
+                            }
+                        }
+                    }
+                    else if (c == '{' || c == '}')
+                    {
+                        PushBuilder();
+                        statements.Add(c.ToString());
+                    }
+                    else if (string.Compare("namespace", 0, line, i, "namespace".Length) == 0)
+                    {
+                        Regex regex = new(@"^\s*namespace\s*\([a-zA-Z_][a-zA-Z0-9_]*\)");
+                        var match = regex.Match(line);
+                        if (match.Success)
+                        {
+                            builder.Append(match.Value);
+                            PushBuilder();
+                            i += match.Length;
+                        }
+                        else
+                        {
+                            throw new RScriptCompileException("Invalid namespace declaration", lineIndex, i);
+                        }
+                        // 前面的操作中已经完成位移, 此处是抵消循环中的i++
+                        i -= 1;
                     }
                     else
                     {
                         builder.Append(c);
                     }
                 }
-                else if (c == '#')
-                {
-                    // Skip single-line comment
-                    while (i < script.Length && script[i] != '\n')
-                        i++;
-                }
-                else if (c == '\"')
-                {
-                    for (i++; i < e; i++)
-                    {
-                        builder.Append(script[i]);
-                        if (script[i] == '\"')
-                        {
-                            break;
-                        }
-                        else if (script[i] == '\\')
-                        {
-                            i++;
-                            if (i < e)
-                                builder.Append(script[i]);
-                            else
-                                throw new RScriptException("Invalid escape sequence in string literal", -1);
-                        }
-                    }
-                }
-                else if (c == '{' || c == '}')
-                {
-                    // Treat braces as statement separators
-                    if (builder.Length > 0)
-                    {
-                        statements.Add(builder.ToString().Trim());
-                        builder.Clear();
-                    }
-                    statements.Add(c.ToString());
-                }
-                else
-                {
-                    builder.Append(c);
-                }
             }
             if (builder.Length > 0)
             {
-                statements.Add(builder.ToString().Trim());
-                builder.Clear();
+                PushBuilder();
             }
 
             return statements.Where(s => !string.IsNullOrWhiteSpace(s));
@@ -104,8 +126,6 @@ namespace Convention.RScript
         {
             parser = new(new());
             context = new(SplitScript(script).ToArray(), import, variables);
-            foreach (var type in context.Import)
-                parser.context.Imports.AddType(type);
             context.Run(parser);
             return context.GetCurrentVariables();
         }
@@ -114,8 +134,6 @@ namespace Convention.RScript
         {
             parser = new(new());
             context = new(SplitScript(script).ToArray(), import, variables);
-            foreach (var type in context.Import)
-                parser.context.Imports.AddType(type);
             return context.RunAsync(parser);
         }
     }