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 
17 using namespace llvm;
18 
StringPool()19 StringPool::StringPool() {}
20 
~StringPool()21 StringPool::~StringPool() {
22   assert(InternTable.empty() && "PooledStringPtr leaked!");
23 }
24 
intern(StringRef Key)25 PooledStringPtr 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