1//===-- StringPool.cpp - Interned string pool -----------------------------===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the StringPool class.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/Support/StringPool.h"
14#include "llvm/ADT/StringRef.h"
15
16using namespace llvm;
17
18StringPool::StringPool() {}
19
20StringPool::~StringPool() {
21  assert(InternTable.empty() && "PooledStringPtr leaked!");
22}
23
24PooledStringPtr StringPool::intern(StringRef Key) {
25  table_t::iterator I = InternTable.find(Key);
26  if (I != InternTable.end())
27    return PooledStringPtr(&*I);
28
29  entry_t *S = entry_t::Create(Key);
30  S->getValue().Pool = this;
31  InternTable.insert(S);
32
33  return PooledStringPtr(S);
34}
35