First public commit!

YATC/ASTNodes/TigerNode.cs

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+/*
+ *  Yet Another Tiger Compiler (YATC)
+ *
+ *  Copyright 2014 Damian Valdés Santiago, Juan Carlos Pujol Mainegra
+ *  
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *  
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.  
+ *
+ */
+
+using Antlr.Runtime;
+using Antlr.Runtime.Tree;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+
+namespace YATC.Scope
+{
+    public abstract class TigerNode : CommonTree
+    {
+        protected TigerNode(IToken payload)
+            : base(payload)
+        {
+        }
+
+        public bool IsRoot
+        {
+            get { return Parent == null; }
+        }
+
+        /// <summary>
+        /// Lists all the nodes from current to root
+        /// </summary>
+        public IEnumerable<TigerNode> GetNodesToRoot()
+        {
+            if (this.IsRoot)
+                yield break;
+
+            Debug.Assert(this.Parent is TigerNode);
+
+            var parent = Parent as TigerNode;
+            yield return parent;
+            foreach (var item in parent.GetNodesToRoot())
+                yield return item;
+        }
+
+        public int Column { get { return CharPositionInLine; } }
+
+        //public new TigerNode Parent
+        //{
+        //    get { return (TigerNode)base.Parent; }
+        //}
+
+        public TigerNode[] TigerChildren
+        {
+            get
+            {
+                return base.Children == null ? new TigerNode[0] : base.Children.Cast<TigerNode>().ToArray();
+            }
+        }
+    }
+}