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//===- StringSet.h - The LLVM Compiler Driver -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open
// Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// StringSet - A set-like wrapper for the StringMap.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ADT_STRINGSET_H
#define LLVM_ADT_STRINGSET_H
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Allocator.h"
#include <cassert>
#include <initializer_list>
#include <utility>
namespace llvm {
/// StringSet - A wrapper for StringMap that provides set-like functionality.
template <class AllocatorTy = MallocAllocator>
class StringSet : public StringMap<char, AllocatorTy> {
using base = StringMap<char, AllocatorTy>;
public:
StringSet() = default;
StringSet(std::initializer_list<StringRef> S) {
for (StringRef X : S)
insert(X);
}
std::pair<typename base::iterator, bool> insert(StringRef Key) {
assert(!Key.empty());
return base::insert(std::make_pair(Key, '\0'));
}
template <typename InputIt>
void insert(const InputIt &Begin, const InputIt &End) {
for (auto It = Begin; It != End; ++It)
base::insert(std::make_pair(*It, '\0'));
}
};
} // end namespace llvm
#endif // LLVM_ADT_STRINGSET_H
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