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1 files changed, 42 insertions, 0 deletions

diff --git a/include/cru/common/bitmask.hpp b/include/cru/common/bitmask.hpp
new file mode 100644
index 00000000..6dfb651c
--- /dev/null
+++ b/include/cru/common/bitmask.hpp
@@ -0,0 +1,42 @@
+#pragma once
+#include "base.hpp"
+
+namespace cru {
+template <typename Tag, typename TUnderlying = unsigned>
+struct Bitmask final {
+  using Underlying = TUnderlying;
+
+  constexpr Bitmask() : value(0) {}
+  constexpr explicit Bitmask(TUnderlying value) : value(value) {}
+
+  CRU_DEFAULT_COPY(Bitmask)
+  CRU_DEFAULT_MOVE(Bitmask)
+
+  ~Bitmask() = default;
+
+  Bitmask operator|(Bitmask rhs) const { return Bitmask(value | rhs.value); }
+  Bitmask operator&(Bitmask rhs) const { return Bitmask(value & rhs.value); }
+  Bitmask operator^(Bitmask rhs) const { return Bitmask(value ^ rhs.value); }
+  Bitmask operator~() const { return Bitmask(~value); }
+  Bitmask& operator|=(Bitmask rhs) {
+    value |= rhs;
+    return *this;
+  }
+  Bitmask& operator&=(Bitmask rhs) {
+    value &= rhs;
+    return *this;
+  }
+  Bitmask& operator^=(Bitmask rhs) {
+    value ^= rhs;
+    return *this;
+  }
+
+  bool operator==(Bitmask rhs) const { return this->value == rhs.value; }
+  bool operator!=(Bitmask rhs) const { return this->value != rhs.value; }
+
+  explicit operator TUnderlying() const { return value; }
+  explicit operator bool() const { return value != 0; }
+
+  TUnderlying value;
+};
+}  // namespace cru