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+/* ----------------------------------------------------------------------------
+ libconfig - A library for processing structured configuration files
+ libconfig chained - Extension for reading the configuration and defining
+ the configuration specification at once.
+ Copyright (C) 2016 Richard Schubert
+
+ This file is part of libconfig contributions.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License
+ as published by the Free Software Foundation; either version 2.1 of
+ the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, see
+ <http://www.gnu.org/licenses/>.
+ ----------------------------------------------------------------------------
+*/
+
+#include <iostream>
+#include <iomanip>
+#include <cstdlib>
+#include "../libconfig_chained.h"
+
+using namespace std;
+using namespace libconfig;
+
+// This example reads complex types from config file using method chains.
+
+void example2(Config& cfg)
+{
+ ChainedSetting cs(cfg.getRoot());
+
+ auto books = cs["inventory"]["books"];
+ if (!books.exists())
+ {
+ cerr << "No book section available." << endl;
+ return;
+ }
+
+ cout << setw(30) << left << "TITLE" << " "
+ << setw(30) << left << "AUTHOR" << " "
+ << setw(6) << left << "PRICE" << " "
+ << "QTY"
+ << endl;
+
+ const int count = books.getLength();
+ for(int i = 0; i < count; ++i)
+ {
+ auto book = books[i];
+
+ string title = book["title"];
+ string author = book["author"];
+ double price = book["price"].min(0.0);
+ int qty = book["qty"].min(0);
+
+ // Only output the record if all of the expected fields are present.
+ if(book.isAnySettingMissing()) continue;
+
+ cout << setw(30) << left << title << " "
+ << setw(30) << left << author << " "
+ << '$' << setw(6) << right << price << " "
+ << qty
+ << endl;
+ }
+}