SmallString.h revision 965841cfe4de695fc56cab4821fd7e032ff85b83 
1//===- llvm/ADT/SmallString.h - 'Normally small' strings --------*- C++ -*-===//
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 defines the SmallString class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_ADT_SMALLSTRING_H
15#define LLVM_ADT_SMALLSTRING_H
16
17#include "llvm/ADT/SmallVector.h"
18#include "llvm/ADT/StringRef.h"
19
20namespace llvm {
21
22/// SmallString - A SmallString is just a SmallVector with methods and accessors
23/// that make it work better as a string (e.g. operator+ etc).
24template<unsigned InternalLen>
25class SmallString : public SmallVector<char, InternalLen> {
26public:
27  // Default ctor - Initialize to empty.
28  SmallString() {}
29
30  // Initialize from a StringRef.
31  SmallString(StringRef S) : SmallVector<char, InternalLen>(S.begin(), S.end()) {}
32
33  // Initialize with a range.
34  template<typename ItTy>
35  SmallString(ItTy S, ItTy E) : SmallVector<char, InternalLen>(S, E) {}
36
37  // Copy ctor.
38  SmallString(const SmallString &RHS) : SmallVector<char, InternalLen>(RHS) {}
39
40
41  // Extra methods.
42  StringRef str() const { return StringRef(this->begin(), this->size()); }
43
44  // TODO: Make this const, if it's safe...
45  const char* c_str() {
46    this->push_back(0);
47    this->pop_back();
48    return this->data();
49  }
50
51  // Implicit conversion to StringRef.
52  operator StringRef() const { return str(); }
53
54  // Extra operators.
55  const SmallString &operator=(StringRef RHS) {
56    this->clear();
57    return *this += RHS;
58  }
59
60  SmallString &operator+=(StringRef RHS) {
61    this->append(RHS.begin(), RHS.end());
62    return *this;
63  }
64  SmallString &operator+=(char C) {
65    this->push_back(C);
66    return *this;
67  }
68};
69
70}
71
72#endif
73