build(antlr): 引入第三方 ANTLR4 runtime/tool 并接入构建

third_party/antlr4-runtime-4.13.2/runtime/src/support/Arrays.cpp

@@ -0,0 +1,43 @@
+/* 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"
+#include "Exceptions.h"
+
+#include "support/Arrays.h"
+
+using namespace antlrcpp;
+
+std::string Arrays::listToString(const std::vector<std::string> &list, const std::string &separator)
+{
+  std::stringstream ss;
+  bool firstEntry = true;
+
+  ss << '[';
+  for (const auto &entry : list) {
+    ss << entry;
+    if (firstEntry) {
+      ss << separator;
+      firstEntry = false;
+    }
+  }
+
+  ss << ']';
+  return ss.str();
+}
+
+template <>
+std::string Arrays::toString(const std::vector<antlr4::tree::ParseTree*> &source) {
+  std::string result = "[";
+  bool firstEntry = true;
+  for (auto *value : source) {
+    result += value->toStringTree();
+    if (firstEntry) {
+      result += ", ";
+      firstEntry = false;
+    }
+  }
+  return result + "]";
+}