fixed template compilation on mingw

src/util/flagsenum.hpp

@@ -0,0 +1,56 @@
+#pragma once
+
+#include <type_traits>
+
+namespace chatterino {
+namespace util {
+
+// = std::enable_if<std::is_enum<T>::value>::type
+
+template <typename T, typename Q = typename std::underlying_type<T>::type>
+class FlagsEnum
+{
+public:
+    FlagsEnum()
+        : value((T)0)
+    {
+    }
+
+    FlagsEnum(T _value)
+        : value(_value)
+    {
+    }
+
+    inline T operator~() const
+    {
+        return (T) ~(Q)this->value;
+    }
+    inline T operator|(Q a) const
+    {
+        return (T)((Q)a | (Q)this->value);
+    }
+    inline T operator&(Q a) const
+    {
+        return (T)((Q)a & (Q)this->value);
+    }
+    inline T operator^(Q a) const
+    {
+        return (T)((Q)a ^ (Q)this->value);
+    }
+    inline T &operator|=(const Q &a)
+    {
+        return (T &)((Q &)this->value |= (Q)a);
+    }
+    inline T &operator&=(const Q &a)
+    {
+        return (T &)((Q &)this->value &= (Q)a);
+    }
+    inline T &operator^=(const Q &a)
+    {
+        return (T &)((Q &)this->value ^= (Q)a);
+    }
+
+    T value;
+};
+}  // namespace util
+}  // namespace chatterino