1 files changed, 86 insertions, 0 deletions

diff --git a/MoonParser/pegtl/contrib/changes.hpp b/MoonParser/pegtl/contrib/changes.hpp
new file mode 100644
index 0000000..7b9f8dc
--- /dev/null
+++ b/MoonParser/pegtl/contrib/changes.hpp
@@ -0,0 +1,86 @@
+// Copyright (c) 2015-2017 Dr. Colin Hirsch and Daniel Frey
+// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
+
+#ifndef TAOCPP_PEGTL_INCLUDE_CONTRIB_CHANGES_HPP
+#define TAOCPP_PEGTL_INCLUDE_CONTRIB_CHANGES_HPP
+
+#include <type_traits>
+
+#include "../config.hpp"
+#include "../normal.hpp"
+
+namespace tao
+{
+   namespace TAOCPP_PEGTL_NAMESPACE
+   {
+      namespace internal
+      {
+         struct dummy_disabled_state
+         {
+            template< typename... Ts >
+            void success( Ts&&... ) const noexcept
+            {
+            }
+         };
+
+         template< apply_mode A, typename State >
+         using state_disable_helper = typename std::conditional< A == apply_mode::ACTION, State, dummy_disabled_state >::type;
+
+      }  // namespace internal
+
+      template< typename Rule, typename State, template< typename... > class Base = normal >
+      struct change_state
+         : public Base< Rule >
+      {
+         template< apply_mode A,
+                   rewind_mode M,
+                   template< typename... > class Action,
+                   template< typename... > class Control,
+                   typename Input,
+                   typename... States >
+         static bool match( Input& in, States&&... st )
+         {
+            internal::state_disable_helper< A, State > s;
+
+            if( Base< Rule >::template match< A, M, Action, Control >( in, s ) ) {
+               s.success( st... );
+               return true;
+            }
+            return false;
+         }
+      };
+
+      template< typename Rule, template< typename... > class Action, template< typename... > class Base = normal >
+      struct change_action
+         : public Base< Rule >
+      {
+         template< apply_mode A,
+                   rewind_mode M,
+                   template< typename... > class,
+                   template< typename... > class Control,
+                   typename Input,
+                   typename... States >
+         static bool match( Input& in, States&&... st )
+         {
+            return Base< Rule >::template match< A, M, Action, Control >( in, st... );
+         }
+      };
+
+      template< template< typename... > class Action, template< typename... > class Base >
+      struct change_both_helper
+      {
+         template< typename T >
+         using change_action = change_action< T, Action, Base >;
+      };
+
+      template< typename Rule, typename State, template< typename... > class Action, template< typename... > class Base = normal >
+      struct change_state_and_action
+         : public change_state< Rule, State, change_both_helper< Action, Base >::template change_action >
+      {
+      };
+
+   }  // namespace TAOCPP_PEGTL_NAMESPACE
+
+}  // namespace tao
+
+#endif