SmallString.h revision 983c7fe847dd3f46945f0117ab19345b9c68e88f 
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 with a range.
31  template<typename ItTy>
32  SmallString(ItTy S, ItTy E) : SmallVector<char, InternalLen>(S, E) {}
33
34  // Copy ctor.
35  SmallString(const SmallString &RHS) : SmallVector<char, InternalLen>(RHS) {}
36
37
38  // Extra methods.
39  StringRef str() const { return StringRef(this->begin(), this->size()); }
40
41  // Implicit conversion to StringRef.
42  operator StringRef() const { return str(); }
43
44  const char *c_str() {
45    this->push_back(0);
46    this->pop_back();
47    return this->data();
48  }
49
50  // Extra operators.
51  const SmallString &operator=(StringRef RHS) {
52    this->clear();
53    return *this += RHS;
54  }
55
56  SmallString &operator+=(StringRef RHS) {
57    this->append(RHS.begin(), RHS.end());
58    return *this;
59  }
60  SmallString &operator+=(char C) {
61    this->push_back(C);
62    return *this;
63  }
64};
65
66}
67
68#endif
69