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annotate include/llvm/Support/YAMLParser.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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1 //===--- YAMLParser.h - Simple YAML parser --------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This is a YAML 1.2 parser.
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11 //
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12 // See http://www.yaml.org/spec/1.2/spec.html for the full standard.
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13 //
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14 // This currently does not implement the following:
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15 // * Multi-line literal folding.
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16 // * Tag resolution.
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17 // * UTF-16.
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18 // * BOMs anywhere other than the first Unicode scalar value in the file.
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19 //
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20 // The most important class here is Stream. This represents a YAML stream with
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21 // 0, 1, or many documents.
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22 //
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23 // SourceMgr sm;
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24 // StringRef input = getInput();
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25 // yaml::Stream stream(input, sm);
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26 //
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27 // for (yaml::document_iterator di = stream.begin(), de = stream.end();
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28 // di != de; ++di) {
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29 // yaml::Node *n = di->getRoot();
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30 // if (n) {
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31 // // Do something with n...
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32 // } else
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33 // break;
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34 // }
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35 //
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36 //===----------------------------------------------------------------------===//
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37
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38 #ifndef LLVM_SUPPORT_YAMLPARSER_H
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39 #define LLVM_SUPPORT_YAMLPARSER_H
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40
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41 #include "llvm/ADT/OwningPtr.h"
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42 #include "llvm/ADT/SmallString.h"
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43 #include "llvm/ADT/StringRef.h"
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44 #include "llvm/Support/Allocator.h"
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45 #include "llvm/Support/SMLoc.h"
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46
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47 #include <map>
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48 #include <limits>
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49 #include <utility>
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50
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51 namespace llvm {
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52 class MemoryBuffer;
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53 class SourceMgr;
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54 class raw_ostream;
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55 class Twine;
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56
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57 namespace yaml {
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58
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59 class document_iterator;
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60 class Document;
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61 class Node;
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62 class Scanner;
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63 struct Token;
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64
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65 /// @brief Dump all the tokens in this stream to OS.
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66 /// @returns true if there was an error, false otherwise.
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67 bool dumpTokens(StringRef Input, raw_ostream &);
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68
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69 /// @brief Scans all tokens in input without outputting anything. This is used
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70 /// for benchmarking the tokenizer.
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71 /// @returns true if there was an error, false otherwise.
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72 bool scanTokens(StringRef Input);
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73
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74 /// @brief Escape \a Input for a double quoted scalar.
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75 std::string escape(StringRef Input);
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76
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77 /// @brief This class represents a YAML stream potentially containing multiple
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78 /// documents.
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79 class Stream {
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80 public:
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81 /// @brief This keeps a reference to the string referenced by \p Input.
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82 Stream(StringRef Input, SourceMgr &);
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83
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84 /// @brief This takes ownership of \p InputBuffer.
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85 Stream(MemoryBuffer *InputBuffer, SourceMgr &);
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86 ~Stream();
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87
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88 document_iterator begin();
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89 document_iterator end();
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90 void skip();
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91 bool failed();
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92 bool validate() {
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93 skip();
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94 return !failed();
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95 }
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96
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97 void printError(Node *N, const Twine &Msg);
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98
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99 private:
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100 OwningPtr<Scanner> scanner;
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101 OwningPtr<Document> CurrentDoc;
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102
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103 friend class Document;
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104 };
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105
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106 /// @brief Abstract base class for all Nodes.
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107 class Node {
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108 virtual void anchor();
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109 public:
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110 enum NodeKind {
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111 NK_Null,
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112 NK_Scalar,
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113 NK_KeyValue,
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114 NK_Mapping,
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115 NK_Sequence,
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116 NK_Alias
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117 };
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118
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119 Node(unsigned int Type, OwningPtr<Document> &, StringRef Anchor,
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120 StringRef Tag);
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121
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122 /// @brief Get the value of the anchor attached to this node. If it does not
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123 /// have one, getAnchor().size() will be 0.
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124 StringRef getAnchor() const { return Anchor; }
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125
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126 /// \brief Get the tag as it was written in the document. This does not
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127 /// perform tag resolution.
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128 StringRef getRawTag() const { return Tag; }
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129
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130 /// \brief Get the verbatium tag for a given Node. This performs tag resoluton
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131 /// and substitution.
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132 std::string getVerbatimTag() const;
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133
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134 SMRange getSourceRange() const { return SourceRange; }
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135 void setSourceRange(SMRange SR) { SourceRange = SR; }
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136
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137 // These functions forward to Document and Scanner.
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138 Token &peekNext();
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diff changeset
139 Token getNext();
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diff changeset
140 Node *parseBlockNode();
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141 BumpPtrAllocator &getAllocator();
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142 void setError(const Twine &Message, Token &Location) const;
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143 bool failed() const;
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144
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145 virtual void skip() {}
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146
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147 unsigned int getType() const { return TypeID; }
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148
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149 void *operator new ( size_t Size
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150 , BumpPtrAllocator &Alloc
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151 , size_t Alignment = 16) throw() {
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152 return Alloc.Allocate(Size, Alignment);
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153 }
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154
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155 void operator delete(void *Ptr, BumpPtrAllocator &Alloc, size_t) throw() {
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156 Alloc.Deallocate(Ptr);
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157 }
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158
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159 protected:
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160 OwningPtr<Document> &Doc;
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161 SMRange SourceRange;
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162
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163 void operator delete(void *) throw() {}
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164
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165 virtual ~Node() {}
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166
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167 private:
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168 unsigned int TypeID;
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169 StringRef Anchor;
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170 /// \brief The tag as typed in the document.
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171 StringRef Tag;
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172 };
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173
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174 /// @brief A null value.
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175 ///
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176 /// Example:
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177 /// !!null null
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178 class NullNode : public Node {
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179 virtual void anchor();
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180 public:
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181 NullNode(OwningPtr<Document> &D)
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182 : Node(NK_Null, D, StringRef(), StringRef()) {}
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183
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184 static inline bool classof(const Node *N) {
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185 return N->getType() == NK_Null;
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186 }
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187 };
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188
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189 /// @brief A scalar node is an opaque datum that can be presented as a
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190 /// series of zero or more Unicode scalar values.
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191 ///
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192 /// Example:
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193 /// Adena
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194 class ScalarNode : public Node {
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195 virtual void anchor();
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196 public:
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197 ScalarNode(OwningPtr<Document> &D, StringRef Anchor, StringRef Tag,
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198 StringRef Val)
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199 : Node(NK_Scalar, D, Anchor, Tag), Value(Val) {
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200 SMLoc Start = SMLoc::getFromPointer(Val.begin());
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201 SMLoc End = SMLoc::getFromPointer(Val.end());
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202 SourceRange = SMRange(Start, End);
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203 }
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204
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205 // Return Value without any escaping or folding or other fun YAML stuff. This
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206 // is the exact bytes that are contained in the file (after conversion to
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parents:
diff changeset
207 // utf8).
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diff changeset
208 StringRef getRawValue() const { return Value; }
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diff changeset
209
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diff changeset
210 /// @brief Gets the value of this node as a StringRef.
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211 ///
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212 /// @param Storage is used to store the content of the returned StringRef iff
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213 /// it requires any modification from how it appeared in the source.
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diff changeset
214 /// This happens with escaped characters and multi-line literals.
95c75e76d11b LLVM 3.4
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parents:
diff changeset
215 StringRef getValue(SmallVectorImpl<char> &Storage) const;
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parents:
diff changeset
216
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diff changeset
217 static inline bool classof(const Node *N) {
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diff changeset
218 return N->getType() == NK_Scalar;
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diff changeset
219 }
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diff changeset
220
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221 private:
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diff changeset
222 StringRef Value;
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diff changeset
223
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parents:
diff changeset
224 StringRef unescapeDoubleQuoted( StringRef UnquotedValue
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diff changeset
225 , StringRef::size_type Start
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diff changeset
226 , SmallVectorImpl<char> &Storage) const;
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diff changeset
227 };
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diff changeset
228
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229 /// @brief A key and value pair. While not technically a Node under the YAML
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diff changeset
230 /// representation graph, it is easier to treat them this way.
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231 ///
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232 /// TODO: Consider making this not a child of Node.
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233 ///
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234 /// Example:
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diff changeset
235 /// Section: .text
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diff changeset
236 class KeyValueNode : public Node {
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237 virtual void anchor();
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diff changeset
238 public:
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diff changeset
239 KeyValueNode(OwningPtr<Document> &D)
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diff changeset
240 : Node(NK_KeyValue, D, StringRef(), StringRef())
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diff changeset
241 , Key(0)
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diff changeset
242 , Value(0)
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243 {}
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diff changeset
244
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245 /// @brief Parse and return the key.
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246 ///
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247 /// This may be called multiple times.
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248 ///
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249 /// @returns The key, or nullptr if failed() == true.
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diff changeset
250 Node *getKey();
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diff changeset
251
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252 /// @brief Parse and return the value.
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253 ///
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254 /// This may be called multiple times.
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diff changeset
255 ///
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256 /// @returns The value, or nullptr if failed() == true.
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diff changeset
257 Node *getValue();
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diff changeset
258
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diff changeset
259 virtual void skip() LLVM_OVERRIDE {
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diff changeset
260 getKey()->skip();
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diff changeset
261 getValue()->skip();
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262 }
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diff changeset
263
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diff changeset
264 static inline bool classof(const Node *N) {
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diff changeset
265 return N->getType() == NK_KeyValue;
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diff changeset
266 }
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diff changeset
267
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268 private:
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diff changeset
269 Node *Key;
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diff changeset
270 Node *Value;
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diff changeset
271 };
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parents:
diff changeset
272
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273 /// @brief This is an iterator abstraction over YAML collections shared by both
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274 /// sequences and maps.
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275 ///
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276 /// BaseT must have a ValueT* member named CurrentEntry and a member function
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277 /// increment() which must set CurrentEntry to 0 to create an end iterator.
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278 template <class BaseT, class ValueT>
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279 class basic_collection_iterator
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280 : public std::iterator<std::forward_iterator_tag, ValueT> {
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281 public:
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282 basic_collection_iterator() : Base(0) {}
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283 basic_collection_iterator(BaseT *B) : Base(B) {}
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284
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285 ValueT *operator ->() const {
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286 assert(Base && Base->CurrentEntry && "Attempted to access end iterator!");
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287 return Base->CurrentEntry;
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288 }
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289
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290 ValueT &operator *() const {
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291 assert(Base && Base->CurrentEntry &&
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292 "Attempted to dereference end iterator!");
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293 return *Base->CurrentEntry;
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294 }
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295
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296 operator ValueT*() const {
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297 assert(Base && Base->CurrentEntry && "Attempted to access end iterator!");
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298 return Base->CurrentEntry;
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299 }
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300
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301 bool operator !=(const basic_collection_iterator &Other) const {
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302 if(Base != Other.Base)
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303 return true;
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304 return (Base && Other.Base) && Base->CurrentEntry
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305 != Other.Base->CurrentEntry;
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306 }
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307
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308 basic_collection_iterator &operator++() {
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309 assert(Base && "Attempted to advance iterator past end!");
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310 Base->increment();
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311 // Create an end iterator.
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312 if (Base->CurrentEntry == 0)
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313 Base = 0;
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314 return *this;
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315 }
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316
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317 private:
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318 BaseT *Base;
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319 };
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320
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321 // The following two templates are used for both MappingNode and Sequence Node.
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322 template <class CollectionType>
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323 typename CollectionType::iterator begin(CollectionType &C) {
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324 assert(C.IsAtBeginning && "You may only iterate over a collection once!");
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325 C.IsAtBeginning = false;
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326 typename CollectionType::iterator ret(&C);
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327 ++ret;
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328 return ret;
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329 }
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330
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331 template <class CollectionType>
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332 void skip(CollectionType &C) {
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333 // TODO: support skipping from the middle of a parsed collection ;/
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334 assert((C.IsAtBeginning || C.IsAtEnd) && "Cannot skip mid parse!");
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335 if (C.IsAtBeginning)
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336 for (typename CollectionType::iterator i = begin(C), e = C.end();
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337 i != e; ++i)
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338 i->skip();
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339 }
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340
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341 /// @brief Represents a YAML map created from either a block map for a flow map.
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342 ///
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343 /// This parses the YAML stream as increment() is called.
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344 ///
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345 /// Example:
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346 /// Name: _main
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347 /// Scope: Global
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348 class MappingNode : public Node {
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349 virtual void anchor();
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350 public:
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351 enum MappingType {
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352 MT_Block,
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353 MT_Flow,
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354 MT_Inline ///< An inline mapping node is used for "[key: value]".
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355 };
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356
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357 MappingNode(OwningPtr<Document> &D, StringRef Anchor, StringRef Tag,
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358 MappingType MT)
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359 : Node(NK_Mapping, D, Anchor, Tag), Type(MT), IsAtBeginning(true),
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360 IsAtEnd(false), CurrentEntry(0) {}
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361
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362 friend class basic_collection_iterator<MappingNode, KeyValueNode>;
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363 typedef basic_collection_iterator<MappingNode, KeyValueNode> iterator;
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364 template <class T> friend typename T::iterator yaml::begin(T &);
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365 template <class T> friend void yaml::skip(T &);
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366
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367 iterator begin() {
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368 return yaml::begin(*this);
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369 }
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370
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371 iterator end() { return iterator(); }
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372
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373 virtual void skip() LLVM_OVERRIDE {
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374 yaml::skip(*this);
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375 }
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376
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377 static inline bool classof(const Node *N) {
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378 return N->getType() == NK_Mapping;
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379 }
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380
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381 private:
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382 MappingType Type;
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383 bool IsAtBeginning;
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diff changeset
384 bool IsAtEnd;
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385 KeyValueNode *CurrentEntry;
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386
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387 void increment();
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388 };
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diff changeset
389
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390 /// @brief Represents a YAML sequence created from either a block sequence for a
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391 /// flow sequence.
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392 ///
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393 /// This parses the YAML stream as increment() is called.
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394 ///
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395 /// Example:
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396 /// - Hello
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397 /// - World
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398 class SequenceNode : public Node {
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399 virtual void anchor();
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400 public:
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401 enum SequenceType {
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diff changeset
402 ST_Block,
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diff changeset
403 ST_Flow,
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diff changeset
404 // Use for:
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diff changeset
405 //
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406 // key:
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407 // - val1
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diff changeset
408 // - val2
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409 //
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parents:
diff changeset
410 // As a BlockMappingEntry and BlockEnd are not created in this case.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
411 ST_Indentless
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
412 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
413
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
414 SequenceNode(OwningPtr<Document> &D, StringRef Anchor, StringRef Tag,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
415 SequenceType ST)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
416 : Node(NK_Sequence, D, Anchor, Tag), SeqType(ST), IsAtBeginning(true),
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
417 IsAtEnd(false),
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
418 WasPreviousTokenFlowEntry(true), // Start with an imaginary ','.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
419 CurrentEntry(0) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
420
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
421 friend class basic_collection_iterator<SequenceNode, Node>;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
422 typedef basic_collection_iterator<SequenceNode, Node> iterator;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
423 template <class T> friend typename T::iterator yaml::begin(T &);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
424 template <class T> friend void yaml::skip(T &);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
425
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
426 void increment();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
427
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
428 iterator begin() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
429 return yaml::begin(*this);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
430 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
431
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
432 iterator end() { return iterator(); }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
433
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
434 virtual void skip() LLVM_OVERRIDE {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
435 yaml::skip(*this);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
436 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
437
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
438 static inline bool classof(const Node *N) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
439 return N->getType() == NK_Sequence;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
440 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
441
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
442 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
443 SequenceType SeqType;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
444 bool IsAtBeginning;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
445 bool IsAtEnd;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
446 bool WasPreviousTokenFlowEntry;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
447 Node *CurrentEntry;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
448 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
449
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
450 /// @brief Represents an alias to a Node with an anchor.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
451 ///
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
452 /// Example:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
453 /// *AnchorName
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
454 class AliasNode : public Node {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
455 virtual void anchor();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
456 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
457 AliasNode(OwningPtr<Document> &D, StringRef Val)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
458 : Node(NK_Alias, D, StringRef(), StringRef()), Name(Val) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
459
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
460 StringRef getName() const { return Name; }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
461 Node *getTarget();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
462
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
463 static inline bool classof(const Node *N) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
464 return N->getType() == NK_Alias;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
465 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
466
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
467 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
468 StringRef Name;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
469 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
470
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
471 /// @brief A YAML Stream is a sequence of Documents. A document contains a root
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
472 /// node.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
473 class Document {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
474 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
475 /// @brief Root for parsing a node. Returns a single node.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
476 Node *parseBlockNode();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
477
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
478 Document(Stream &ParentStream);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
479
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
480 /// @brief Finish parsing the current document and return true if there are
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
481 /// more. Return false otherwise.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
482 bool skip();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
483
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
484 /// @brief Parse and return the root level node.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
485 Node *getRoot() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
486 if (Root)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
487 return Root;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
488 return Root = parseBlockNode();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
489 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
490
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
491 const std::map<StringRef, StringRef> &getTagMap() const {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
492 return TagMap;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
493 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
494
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
495 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
496 friend class Node;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
497 friend class document_iterator;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
498
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
499 /// @brief Stream to read tokens from.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
500 Stream &stream;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
501
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
502 /// @brief Used to allocate nodes to. All are destroyed without calling their
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
503 /// destructor when the document is destroyed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
504 BumpPtrAllocator NodeAllocator;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
505
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
506 /// @brief The root node. Used to support skipping a partially parsed
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
507 /// document.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
508 Node *Root;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
509
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
510 /// \brief Maps tag prefixes to their expansion.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
511 std::map<StringRef, StringRef> TagMap;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
512
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
513 Token &peekNext();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
514 Token getNext();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
515 void setError(const Twine &Message, Token &Location) const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
516 bool failed() const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
517
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
518 /// @brief Parse %BLAH directives and return true if any were encountered.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
519 bool parseDirectives();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
520
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
521 /// \brief Parse %YAML
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
522 void parseYAMLDirective();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
523
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
524 /// \brief Parse %TAG
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
525 void parseTAGDirective();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
526
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
527 /// @brief Consume the next token and error if it is not \a TK.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
528 bool expectToken(int TK);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
529 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
530
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
531 /// @brief Iterator abstraction for Documents over a Stream.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
532 class document_iterator {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
533 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
534 document_iterator() : Doc(0) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
535 document_iterator(OwningPtr<Document> &D) : Doc(&D) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
536
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
537 bool operator ==(const document_iterator &Other) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
538 if (isAtEnd() || Other.isAtEnd())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
539 return isAtEnd() && Other.isAtEnd();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
540
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
541 return Doc == Other.Doc;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
542 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
543 bool operator !=(const document_iterator &Other) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
544 return !(*this == Other);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
545 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
546
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
547 document_iterator operator ++() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
548 assert(Doc != 0 && "incrementing iterator past the end.");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
549 if (!(*Doc)->skip()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
550 Doc->reset(0);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
551 } else {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
552 Stream &S = (*Doc)->stream;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
553 Doc->reset(new Document(S));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
554 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
555 return *this;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
556 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
557
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
558 Document &operator *() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
559 return *Doc->get();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
560 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
561
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
562 OwningPtr<Document> &operator ->() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
563 return *Doc;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
564 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
565
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
566 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
567 bool isAtEnd() const {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
568 return !Doc || !*Doc;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
569 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
570
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
571 OwningPtr<Document> *Doc;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
572 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
573
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
574 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
575 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
576
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
577 #endif