StringPool.cpp revision cd81d94322a39503e4a3e87b6ee03d4fcb3465fb 
1//===-- StringPool.cpp - Interned string pool -----------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the StringPool class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Support/StringPool.h"
15#include "llvm/ADT/StringRef.h"
16
17using namespace llvm;
18
19StringPool::StringPool() {}
20
21StringPool::~StringPool() {
22  assert(InternTable.empty() && "PooledStringPtr leaked!");
23}
24
25PooledStringPtr StringPool::intern(StringRef Key) {
26  table_t::iterator I = InternTable.find(Key);
27  if (I != InternTable.end())
28    return PooledStringPtr(&*I);
29
30  entry_t *S = entry_t::Create(Key);
31  S->getValue().Pool = this;
32  InternTable.insert(S);
33
34  return PooledStringPtr(S);
35}
36