Project template

vendor/zgpu/libs/dawn/include/tint/override_id.h

@@ -0,0 +1,66 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SRC_TINT_OVERRIDE_ID_H_
+#define SRC_TINT_OVERRIDE_ID_H_
+
+#include <stdint.h>
+#include <functional>
+
+#include "src/tint/reflection.h"
+
+namespace tint {
+
+/// OverrideId is a numerical identifier for an override variable, unique per program.
+struct OverrideId {
+    uint16_t value = 0;
+
+    /// Reflect the fields of this struct so that it can be used by tint::ForeachField()
+    TINT_REFLECT(value);
+};
+
+/// Equality operator for OverrideId
+/// @param lhs the OverrideId on the left of the '=' operator
+/// @param rhs the OverrideId on the right of the '=' operator
+/// @returns true if `lhs` is equal to `rhs`
+inline bool operator==(OverrideId lhs, OverrideId rhs) {
+    return lhs.value == rhs.value;
+}
+
+/// Less-than operator for OverrideId
+/// @param lhs the OverrideId on the left of the '<' operator
+/// @param rhs the OverrideId on the right of the '<' operator
+/// @returns true if `lhs` comes before `rhs`
+inline bool operator<(OverrideId lhs, OverrideId rhs) {
+    return lhs.value < rhs.value;
+}
+
+}  // namespace tint
+
+namespace std {
+
+/// Custom std::hash specialization for tint::OverrideId.
+template <>
+class hash<tint::OverrideId> {
+  public:
+    /// @param id the override identifier
+    /// @return the hash of the override identifier
+    inline std::size_t operator()(tint::OverrideId id) const {
+        return std::hash<decltype(tint::OverrideId::value)>()(id.value);
+    }
+};
+
+}  // namespace std
+
+#endif  // SRC_TINT_OVERRIDE_ID_H_