add antlr source code and ReadMe

[toc] / antlr4-cpp-runtime-4.9.2-source / runtime / src / tree / ParseTree.cpp

diff --git a/antlr4-cpp-runtime-4.9.2-source/runtime/src/tree/ParseTree.cpp b/antlr4-cpp-runtime-4.9.2-source/runtime/src/tree/ParseTree.cpp
new file mode 100644 (file)
index 0000000..b975a40
--- /dev/null
+++ b/antlr4-cpp-runtime-4.9.2-source/runtime/src/tree/ParseTree.cpp
@@ -0,0 +1,15 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "tree/ParseTree.h"
+
+using namespace antlr4::tree;
+
+ParseTree::ParseTree() : parent(nullptr) {
+}
+
+bool ParseTree::operator == (const ParseTree &other) const {
+  return &other == this;
+}