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48 lines
1.3 KiB
48 lines
1.3 KiB
/* |
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* Copyright 2014 Google Inc. All rights reserved. |
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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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*/ |
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#ifndef FRUIT_CLASS_CONSTRUCTION_TRACKER_H |
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#define FRUIT_CLASS_CONSTRUCTION_TRACKER_H |
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#include <cstddef> |
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/** |
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* This class is useful to keep track of how many instances of a given type are created during the entire program |
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* execution. |
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* |
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* Example use: |
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* class Foo : public ConstructionTracker<Foo> { |
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* ... |
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* }; |
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* |
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* int main() { |
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* ... |
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* assert(Foo::num_objects_constructed == 3); |
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* } |
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*/ |
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template <typename T> |
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struct ConstructionTracker { |
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static std::size_t num_objects_constructed; |
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ConstructionTracker() { |
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++num_objects_constructed; |
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} |
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}; |
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template <typename T> |
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std::size_t ConstructionTracker<T>::num_objects_constructed = 0; |
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#endif // FRUIT_CLASS_CONSTRUCTION_TRACKER_H
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