basic permission handling + use for edit/delete

1 files changed, 36 insertions, 0 deletions

diff --git a/util.hpp b/util.hpp
index 5caa49b..925ace9 100644
--- a/util.hpp
+++ b/util.hpp
@@ -10,6 +10,42 @@
 #include <iomanip>
 
 template<typename T>
+struct Bitwise {
+    static const bool enable = false;
+};
+
+template<typename T>
+typename std::enable_if<Bitwise<T>::enable, T>::type operator|(T a, T b) {
+    using x = typename std::underlying_type<T>::type;
+    return static_cast<T>(static_cast<x>(a) | static_cast<x>(b));
+}
+
+template<typename T>
+typename std::enable_if<Bitwise<T>::enable, T>::type operator|=(T &a, T b) {
+    using x = typename std::underlying_type<T>::type;
+    a = static_cast<T>(static_cast<x>(a) | static_cast<x>(b));
+    return a;
+}
+
+template<typename T>
+typename std::enable_if<Bitwise<T>::enable, T>::type operator&(T a, T b) {
+    using x = typename std::underlying_type<T>::type;
+    return static_cast<T>(static_cast<x>(a) & static_cast<x>(b));
+}
+
+template<typename T>
+typename std::enable_if<Bitwise<T>::enable, T>::type operator&=(T &a, T b) {
+    using x = typename std::underlying_type<T>::type;
+    a = static_cast<T>(static_cast<x>(a) & static_cast<x>(b));
+    return a;
+}
+
+template<typename T>
+typename std::enable_if<Bitwise<T>::enable, T>::type operator~(T a) {
+    return static_cast<T>(~static_cast<std::underlying_type<T>::type>(a));
+}
+
+template<typename T>
 inline void AlphabeticalSort(T start, T end, std::function<std::string(const typename std::iterator_traits<T>::value_type &)> get_string) {
     std::sort(start, end, [&](const auto &a, const auto &b) -> bool {
         const std::string &s1 = get_string(a);