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