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1//===- StringSet.h - The LLVM Compiler Driver -------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open
6// Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// StringSet - A set-like wrapper for the StringMap.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_ADT_STRINGSET_H
15#define LLVM_ADT_STRINGSET_H
16
17#include "llvm/ADT/StringMap.h"
18#include "llvm/ADT/StringRef.h"
19#include "llvm/Support/Allocator.h"
20#include <cassert>
21#include <initializer_list>
22#include <utility>
23
24namespace llvm {
25
26 /// StringSet - A wrapper for StringMap that provides set-like functionality.
27 template <class AllocatorTy = MallocAllocator>
28 class StringSet : public StringMap<char, AllocatorTy> {
29 using base = StringMap<char, AllocatorTy>;
30
31 public:
32 StringSet() = default;
33 StringSet(std::initializer_list<StringRef> S) {
34 for (StringRef X : S)
35 insert(X);
36 }
37
38 std::pair<typename base::iterator, bool> insert(StringRef Key) {
39 assert(!Key.empty());
40 return base::insert(std::make_pair(Key, '\0'));
41 }
42
43 template <typename InputIt>
44 void insert(const InputIt &Begin, const InputIt &End) {
45 for (auto It = Begin; It != End; ++It)
46 base::insert(std::make_pair(*It, '\0'));
47 }
48 };
49
50} // end namespace llvm
51
52#endif // LLVM_ADT_STRINGSET_H
53

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