61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
// 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>
|
|
|
|
namespace tint {
|
|
|
|
/// OverrideId is a numerical identifier for an override variable, unique per program.
|
|
struct OverrideId {
|
|
uint16_t value = 0;
|
|
};
|
|
|
|
/// 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_
|