Added simple loading utility.

include/valijson/utils/yaml_cpp_utils.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <iostream>
+#include <memory>
+#include <string>
+
+#include <yaml-cpp/yaml.h>
+
+#include <valijson/utils/file_utils.hpp>
+
+namespace valijson {
+namespace utils {
+
+inline bool loadDocument(const std::string &path, YAML::Node &document)
+{
+    try {
+        document = YAML::LoadFile(path);
+        return true;
+    } catch (const YAML::BadFile &ex) {
+        std::cerr << "Failed to load YAML from file '" << path << "'." << std::endl;
+        return false;
+    } catch (const YAML::ParserException &ex) {
+        std::cout << "yaml-cpp failed to parse the document '" << ex.what() << std::endl;
+        return false;
+    }
+}
+
+} // namespace utils
+} // namespace valijson