73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright 2016 WebAssembly Community Group participants
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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 WABT_BINDING_HASH_H_
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#define WABT_BINDING_HASH_H_
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#include <functional>
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#include <string>
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#include <string_view>
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#include <unordered_map>
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#include <vector>
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#include "wabt/common.h"
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namespace wabt {
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struct Var;
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struct Binding {
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explicit Binding(Index index) : index(index) {}
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Binding(const Location& loc, Index index) : loc(loc), index(index) {}
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Location loc;
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Index index;
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};
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// This class derives from a C++ container, which is usually not advisable
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// because they don't have virtual destructors. So don't delete a BindingHash
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// object through a pointer to std::unordered_multimap.
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class BindingHash : public std::unordered_multimap<std::string, Binding> {
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public:
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using DuplicateCallback =
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std::function<void(const value_type&, const value_type&)>;
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void FindDuplicates(DuplicateCallback callback) const;
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Index FindIndex(const Var&) const;
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Index FindIndex(const std::string& name) const {
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auto iter = find(name);
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return iter != end() ? iter->second.index : kInvalidIndex;
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}
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Index FindIndex(std::string_view name) const {
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return FindIndex(std::string(name));
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}
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private:
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using ValueTypeVector = std::vector<const value_type*>;
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void CreateDuplicatesVector(ValueTypeVector* out_duplicates) const;
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void SortDuplicatesVectorByLocation(ValueTypeVector* duplicates) const;
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void CallCallbacks(const ValueTypeVector& duplicates,
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DuplicateCallback callback) const;
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};
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} // namespace wabt
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#endif /* WABT_BINDING_HASH_H_ */
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