解离出Runner

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;
+        }
+    }
+}