1 files changed, 95 insertions, 0 deletions
diff --git a/src/libs/3rdparty/yaml-cpp/src/setting.h b/src/libs/3rdparty/yaml-cpp/src/setting.h
new file mode 100644
index 0000000000..b78d40e2e8
--- /dev/null
+++ b/src/libs/3rdparty/yaml-cpp/src/setting.h
@@ -0,0 +1,95 @@
+#ifndef SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#if defined(_MSC_VER) ||                                            \
+    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
+     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+#include <memory>
+#include <vector>
+#include "yaml-cpp/noncopyable.h"
+
+namespace YAML {
+class SettingChangeBase;
+
+template <typename T>
+class Setting {
+ public:
+  Setting() : m_value() {}
+
+  const T get() const { return m_value; }
+  std::unique_ptr<SettingChangeBase> set(const T& value);
+  void restore(const Setting<T>& oldSetting) { m_value = oldSetting.get(); }
+
+ private:
+  T m_value;
+};
+
+class SettingChangeBase {
+ public:
+  virtual ~SettingChangeBase() {}
+  virtual void pop() = 0;
+};
+
+template <typename T>
+class SettingChange : public SettingChangeBase {
+ public:
+  SettingChange(Setting<T>* pSetting) : m_pCurSetting(pSetting) {
+    // copy old setting to save its state
+    m_oldSetting = *pSetting;
+  }
+
+  virtual void pop() { m_pCurSetting->restore(m_oldSetting); }
+
+ private:
+  Setting<T>* m_pCurSetting;
+  Setting<T> m_oldSetting;
+};
+
+template <typename T>
+inline std::unique_ptr<SettingChangeBase> Setting<T>::set(const T& value) {
+  std::unique_ptr<SettingChangeBase> pChange(new SettingChange<T>(this));
+  m_value = value;
+  return pChange;
+}
+
+class SettingChanges : private noncopyable {
+ public:
+  SettingChanges() {}
+  ~SettingChanges() { clear(); }
+
+  void clear() {
+    restore();
+    m_settingChanges.clear();
+  }
+
+  void restore() {
+    for (setting_changes::const_iterator it = m_settingChanges.begin();
+         it != m_settingChanges.end(); ++it)
+      (*it)->pop();
+  }
+
+  void push(std::unique_ptr<SettingChangeBase> pSettingChange) {
+    m_settingChanges.push_back(std::move(pSettingChange));
+  }
+
+  // like std::unique_ptr - assignment is transfer of ownership
+  SettingChanges& operator=(SettingChanges&& rhs) {
+    if (this == &rhs)
+      return *this;
+
+    clear();
+    std::swap(m_settingChanges, rhs.m_settingChanges);
+
+    return *this;
+  }
+
+ private:
+  typedef std::vector<std::unique_ptr<SettingChangeBase>> setting_changes;
+  setting_changes m_settingChanges;
+};
+}
+
+#endif  // SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66