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56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
//===- StringSet.h - An efficient set built on StringMap --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// StringSet - A set-like wrapper for the StringMap.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_STRINGSET_H
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#define LLVM_ADT_STRINGSET_H
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#include "llvm/ADT/StringMap.h"
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namespace llvm {
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/// StringSet - A wrapper for StringMap that provides set-like functionality.
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template <class AllocatorTy = MallocAllocator>
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class StringSet : public StringMap<NoneType, AllocatorTy> {
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using Base = StringMap<NoneType, AllocatorTy>;
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public:
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StringSet() = default;
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StringSet(std::initializer_list<StringRef> initializer) {
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for (StringRef str : initializer)
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insert(str);
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}
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explicit StringSet(AllocatorTy a) : Base(a) {}
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std::pair<typename Base::iterator, bool> insert(StringRef key) {
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return Base::try_emplace(key);
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}
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template <typename InputIt>
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void insert(const InputIt &begin, const InputIt &end) {
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for (auto it = begin; it != end; ++it)
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insert(*it);
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}
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template <typename ValueTy>
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std::pair<typename Base::iterator, bool>
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insert(const StringMapEntry<ValueTy> &mapEntry) {
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return insert(mapEntry.getKey());
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}
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/// Check if the set contains the given \c key.
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bool contains(StringRef key) const { return Base::FindKey(key) != -1; }
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};
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} // end namespace llvm
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#endif // LLVM_ADT_STRINGSET_H
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