Flee

Parsing/Production.cs

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+using System.Collections;
+
+namespace Flee.Parsing
+{
+
+    /**
+    * A production node. This class represents a grammar production
+    * (i.e. a list of child nodes) in a parse tree. The productions
+    * are created by a parser, that adds children a according to a
+    * set of production patterns (i.e. grammar rules).
+    */
+    internal class Production : Node
+    {
+        private readonly ProductionPattern _pattern;
+        private readonly ArrayList _children;
+
+        public Production(ProductionPattern pattern)
+        {
+            this._pattern = pattern;
+            this._children = new ArrayList();
+        }
+
+        public override int Id => _pattern.Id;
+
+        public override string Name => _pattern.Name;
+
+        public override int Count => _children.Count;
+
+        public override Node this[int index]
+        {
+            get
+            {
+                if (index < 0 || index >= _children.Count)
+                {
+                    return null;
+                }
+                else
+                {
+                    return (Node)_children[index];
+                }
+            }
+        }
+
+        public void AddChild(Node child)
+        {
+            if (child != null)
+            {
+                child.SetParent(this);
+                _children.Add(child);
+            }
+        }
+
+        public ProductionPattern Pattern => _pattern;
+
+        public ProductionPattern GetPattern()
+        {
+            return Pattern;
+        }
+
+        internal override bool IsHidden()
+        {
+            return _pattern.Synthetic;
+        }
+
+        public override string ToString()
+        {
+            return _pattern.Name + '(' + _pattern.Id + ')';
+        }
+    }
+}