1 //===- StringSet.h - An efficient set built on StringMap --------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // StringSet - A set-like wrapper for the StringMap.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_ADT_STRINGSET_H
14 #define LLVM_ADT_STRINGSET_H
16 #include "llvm/ADT/StringMap.h"
20 /// StringSet - A wrapper for StringMap that provides set-like functionality.
21 template <class AllocatorTy = MallocAllocator>
22 class StringSet : public StringMap<NoneType, AllocatorTy> {
23 using Base = StringMap<NoneType, AllocatorTy>;
26 StringSet() = default;
27 StringSet(std::initializer_list<StringRef> initializer) {
28 for (StringRef str : initializer)
31 explicit StringSet(AllocatorTy a) : Base(a) {}
33 std::pair<typename Base::iterator, bool> insert(StringRef key) {
34 return Base::try_emplace(key);
37 template <typename InputIt>
38 void insert(const InputIt &begin, const InputIt &end) {
39 for (auto it = begin; it != end; ++it)
43 template <typename ValueTy>
44 std::pair<typename Base::iterator, bool>
45 insert(const StringMapEntry<ValueTy> &mapEntry) {
46 return insert(mapEntry.getKey());
50 } // end namespace llvm
52 #endif // LLVM_ADT_STRINGSET_H