1 files changed, 116 insertions, 0 deletions
diff --git a/antlr-3.4/runtime/CSharp2/Sources/Antlr3.Runtime/Antlr.Runtime.Tree/CommonErrorNode.cs b/antlr-3.4/runtime/CSharp2/Sources/Antlr3.Runtime/Antlr.Runtime.Tree/CommonErrorNode.cs
new file mode 100644
index 0000000..cfcb4ff
--- /dev/null
+++ b/antlr-3.4/runtime/CSharp2/Sources/Antlr3.Runtime/Antlr.Runtime.Tree/CommonErrorNode.cs
@@ -0,0 +1,116 @@
+/*
+ * [The "BSD licence"]
+ * Copyright (c) 2005-2008 Terence Parr
+ * All rights reserved.
+ *
+ * Conversion to C#:
+ * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+namespace Antlr.Runtime.Tree {
+
+    /** <summary>A node representing erroneous token range in token stream</summary> */
+    [System.Serializable]
+    public class CommonErrorNode : CommonTree {
+        public IIntStream input;
+        public IToken start;
+        public IToken stop;
+        public RecognitionException trappedException;
+
+        public CommonErrorNode(ITokenStream input, IToken start, IToken stop,
+                               RecognitionException e) {
+            //System.out.println("start: "+start+", stop: "+stop);
+            if (stop == null ||
+                 (stop.TokenIndex < start.TokenIndex &&
+                  stop.Type != TokenTypes.EndOfFile)) {
+                // sometimes resync does not consume a token (when LT(1) is
+                // in follow set.  So, stop will be 1 to left to start. adjust.
+                // Also handle case where start is the first token and no token
+                // is consumed during recovery; LT(-1) will return null.
+                stop = start;
+            }
+            this.input = input;
+            this.start = start;
+            this.stop = stop;
+            this.trappedException = e;
+        }
+
+        #region Properties
+        public override bool IsNil {
+            get {
+                return false;
+            }
+        }
+        public override string Text {
+            get {
+                string badText = null;
+                if (start is IToken) {
+                    int i = ((IToken)start).TokenIndex;
+                    int j = ((IToken)stop).TokenIndex;
+                    if (((IToken)stop).Type == TokenTypes.EndOfFile) {
+                        j = ((ITokenStream)input).Count;
+                    }
+                    badText = ((ITokenStream)input).ToString(i, j);
+                } else if (start is ITree) {
+                    badText = ((ITreeNodeStream)input).ToString(start, stop);
+                } else {
+                    // people should subclass if they alter the tree type so this
+                    // next one is for sure correct.
+                    badText = "<unknown>";
+                }
+                return badText;
+            }
+            set {
+            }
+        }
+        public override int Type {
+            get {
+                return TokenTypes.Invalid;
+            }
+            set {
+            }
+        }
+        #endregion
+
+        public override string ToString() {
+            if (trappedException is MissingTokenException) {
+                return "<missing type: " +
+                       ((MissingTokenException)trappedException).MissingType +
+                       ">";
+            } else if (trappedException is UnwantedTokenException) {
+                return "<extraneous: " +
+                       ((UnwantedTokenException)trappedException).UnexpectedToken +
+                       ", resync=" + Text + ">";
+            } else if (trappedException is MismatchedTokenException) {
+                return "<mismatched token: " + trappedException.Token + ", resync=" + Text + ">";
+            } else if (trappedException is NoViableAltException) {
+                return "<unexpected: " + trappedException.Token +
+                       ", resync=" + Text + ">";
+            }
+            return "<error: " + Text + ">";
+        }
+    }
+}