Change code flow and variable statements

- Labels (`lbl`) in functions are now local
- Fix code smell problems

YesNt.Interpreter/Attributes/StaticStatementAttribute.cs

@@ -7,7 +7,7 @@ namespace YesNt.Interpreter.Attributes
     [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
     internal class StaticStatementAttribute : Attribute
     {
-        public bool ExecuteInSearchLabelMode { get; set; }
+        public bool ExecuteInSearchMode { get; set; }
         public Priority Priority { get; set; } = Priority.Normal;
     }
 }

YesNt.Interpreter/Runtime/RuntimeInformation.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 using YesNt.Interpreter.Runtime;
 using YesNt.Interpreter.Utilities;
@@ -11,10 +12,11 @@ namespace YesNt.Interpreter
         private RuntimeInformation parentRuntimeInformation;
         private static int internalTaskId = 0;
         private int taskId = 0;
+
         private readonly Dictionary<string, string> topVariables = new();
+        private readonly Dictionary<string, int> topLabels = new();
 
         public Dictionary<string, string> GloablVariables { get; set; } = new();
-        public Dictionary<string, int> Labels { get; } = new();
         public Dictionary<string, int> Functions { get; } = new();
         public Stack<FunctionScope> FunctionCallStack { get; } = new();
         public Stack<string> InParametersStack { get; } = new();
@@ -30,8 +32,7 @@ namespace YesNt.Interpreter
         public string CurrentFilePath { get; set; } = string.Empty;
         public bool IsTask => ParentRuntimeInformation is not null;
         public int TaskId => IsTask ? taskId : 0;
-
-        public bool InternalIsInFunction { get; private set; } = false;
+        public bool InternalIsInFunction { get; set; }
 
         public bool IsInFunction
         {
@@ -54,6 +55,21 @@ namespace YesNt.Interpreter
             }
         }
 
+        public Dictionary<string, int> Labels
+        {
+            get
+            {
+                if (FunctionCallStack.Count == 0)
+                {
+                    return topLabels;
+                }
+                else
+                {
+                    return FunctionCallStack.Peek().Labels;
+                }
+            }
+        }
+
         public RuntimeInformation ParentRuntimeInformation
         {
             get => parentRuntimeInformation;
@@ -68,6 +84,7 @@ namespace YesNt.Interpreter
         }
 
         public bool IsSearching => !string.IsNullOrWhiteSpace(SearchLabel + SearchFunction) || IsInFunction && FunctionCallStack.Count == 0;
+        public bool IsLocalSearch { get; set; }
 
         private event Action<string, bool> OnExit;
 
@@ -75,9 +92,9 @@ namespace YesNt.Interpreter
 
         public event Action<DebugEventArgs> OnLineExecuted;
 
-        private void ParentRuntimeInformation_OnExit(string exitMessage, bool stopChildTasks)
+        private void ParentRuntimeInformation_OnExit(string exitMessage, bool stopAllTasks)
         {
-            Exit($"Terminated by parent task", stopChildTasks);
+            Exit($"Terminated by parent task", stopAllTasks);
         }
 
         public void WriteLine(string output, bool forceWrite = false)
@@ -134,6 +151,13 @@ namespace YesNt.Interpreter
             {
                 Line line = Lines[Math.Min(LineNumber, Lines.Count - 1)];
                 WriteLine($"{Environment.NewLine}[{(IsTask ? $"Task {TaskId}" : "The process")} was terminated at line {line.LineNumber + 1} in the file \"{line.FileName}\" with the message: {message}]", true);
+                while (FunctionCallStack.Count > 0)
+                {
+                    int stackLineNumber = FunctionCallStack.Pop().CallerLine;
+                    Line stackLine = (ParentRuntimeInformation?.Lines ?? Lines).ElementAt(stackLineNumber);
+                    WriteLine($"    at line {stackLine.LineNumber + 1} in the file \"{stackLine.FileName}\"", true);
+                }
+
                 Stop = true;
             }
             if (stopAllTasks && !StopAllTasks)
@@ -173,7 +197,7 @@ namespace YesNt.Interpreter
             StopAllTasks = false;
             IsDebugMode = false;
             IsInFunction = false;
-            InternalIsInFunction = false;
+            IsLocalSearch = false;
             LineNumber = 0;
             taskId = internalTaskId + 1;
 #pragma warning disable S2696 // Instance members should not write to "static" fields

YesNt.Interpreter/Statements/CodeFlowStatements.cs

@@ -23,6 +23,7 @@ namespace YesNt.Interpreter.Statements
             else
             {
                 RuntimeInfo.SearchLabel = key;
+                RuntimeInfo.IsLocalSearch = RuntimeInfo.IsInFunction;
             }
         }
 
@@ -59,6 +60,7 @@ namespace YesNt.Interpreter.Statements
             else
             {
                 RuntimeInfo.SearchLabel = key;
+                RuntimeInfo.IsLocalSearch = RuntimeInfo.IsInFunction;
             }
         }
 
@@ -78,6 +80,7 @@ namespace YesNt.Interpreter.Statements
             if (!string.IsNullOrWhiteSpace(RuntimeInfo.SearchLabel) && RuntimeInfo.SearchLabel == key)
             {
                 RuntimeInfo.SearchLabel = string.Empty;
+                RuntimeInfo.IsLocalSearch = false;
             }
         }
 
@@ -125,7 +128,7 @@ namespace YesNt.Interpreter.Statements
                 return;
             }
 
-            RuntimeInfo.FunctionCallStack.Push(new FunctionScope(RuntimeInfo.LineNumber, new Stack<string>(RuntimeInfo.InParametersStack.Reverse())));
+            RuntimeInfo.FunctionCallStack.Push(new FunctionScope(RuntimeInfo.LineNumber, new Stack<string>(RuntimeInfo.InParametersStack)));
             RuntimeInfo.InParametersStack.Clear();
 
             if (RuntimeInfo.Functions.ContainsKey(key))
@@ -144,6 +147,11 @@ namespace YesNt.Interpreter.Statements
             if (RuntimeInfo.IsSearching)
             {
                 RuntimeInfo.IsInFunction = false;
+                if (RuntimeInfo.IsLocalSearch)
+                {
+                    RuntimeInfo.Exit($"Label \"{RuntimeInfo.SearchLabel}\" not found", true);
+                }
+
                 return;
             }
             else
@@ -160,6 +168,11 @@ namespace YesNt.Interpreter.Statements
             if (RuntimeInfo.IsSearching)
             {
                 RuntimeInfo.IsInFunction = false;
+                if (RuntimeInfo.IsLocalSearch)
+                {
+                    RuntimeInfo.Exit($"Label \"{RuntimeInfo.SearchLabel}\" not found", true);
+                }
+
                 return;
             }
             else

YesNt.Interpreter/Statements/VariableStatements.cs

@@ -81,8 +81,8 @@ namespace YesNt.Interpreter.Statements
             }
         }
 
-        [StaticStatement(ExecuteInSearchLabelMode = true)]
-        public void ReadVariable()
+        [Statement(">", SearchMode.Contains, SpaceAround.None, Priority = Priority.Highest)]
+        public void ReadVariable(string _)
         {
             if (!RuntimeInfo.CurrentLine.Contains('>'))
             {