StringSet.h revision 245431 
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
19namespace llvm {
20
21  /// StringSet - A wrapper for StringMap that provides set-like
22  /// functionality.  Only insert() and count() methods are used by my
23  /// code.
24  template <class AllocatorTy = llvm::MallocAllocator>
25  class StringSet : public llvm::StringMap<char, AllocatorTy> {
26    typedef llvm::StringMap<char, AllocatorTy> base;
27  public:
28    bool insert(StringRef InLang) {
29      assert(!InLang.empty());
30      const char *KeyStart = InLang.data();
31      const char *KeyEnd = KeyStart + InLang.size();
32      llvm::StringMapEntry<char> *Entry = llvm::StringMapEntry<char>::
33                            Create(KeyStart, KeyEnd, base::getAllocator(), '+');
34      if (!base::insert(Entry)) {
35        Entry->Destroy(base::getAllocator());
36        return false;
37      }
38      return true;
39    }
40  };
41}
42
43#endif // LLVM_ADT_STRINGSET_H
44