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annotate include/llvm/Support/YAMLParser.h @ 77:54457678186b

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children afa8332a0e37
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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/SmallString.h"
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42 #include "llvm/ADT/StringRef.h"
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43 #include "llvm/Support/Allocator.h"
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44 #include "llvm/Support/MemoryBuffer.h"
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45 #include "llvm/Support/SMLoc.h"
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46 #include <limits>
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47 #include <map>
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48 #include <utility>
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49
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50 namespace llvm {
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51 class SourceMgr;
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52 class raw_ostream;
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53 class Twine;
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54
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55 namespace yaml {
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56
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57 class document_iterator;
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58 class Document;
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59 class Node;
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60 class Scanner;
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61 struct Token;
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62
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63 /// \brief Dump all the tokens in this stream to OS.
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64 /// \returns true if there was an error, false otherwise.
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65 bool dumpTokens(StringRef Input, raw_ostream &);
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66
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67 /// \brief Scans all tokens in input without outputting anything. This is used
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68 /// for benchmarking the tokenizer.
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69 /// \returns true if there was an error, false otherwise.
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70 bool scanTokens(StringRef Input);
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71
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72 /// \brief Escape \a Input for a double quoted scalar.
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73 std::string escape(StringRef Input);
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74
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75 /// \brief This class represents a YAML stream potentially containing multiple
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76 /// documents.
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77 class Stream {
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78 public:
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79 /// \brief This keeps a reference to the string referenced by \p Input.
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80 Stream(StringRef Input, SourceMgr &);
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81
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82 Stream(MemoryBufferRef InputBuffer, SourceMgr &);
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83 ~Stream();
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84
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85 document_iterator begin();
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86 document_iterator end();
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87 void skip();
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88 bool failed();
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89 bool validate() {
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90 skip();
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91 return !failed();
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92 }
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93
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94 void printError(Node *N, const Twine &Msg);
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95
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96 private:
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97 std::unique_ptr<Scanner> scanner;
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98 std::unique_ptr<Document> CurrentDoc;
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99
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100 friend class Document;
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101 };
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102
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103 /// \brief Abstract base class for all Nodes.
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104 class Node {
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105 virtual void anchor();
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106
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107 public:
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108 enum NodeKind {
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109 NK_Null,
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110 NK_Scalar,
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111 NK_KeyValue,
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112 NK_Mapping,
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113 NK_Sequence,
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114 NK_Alias
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115 };
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116
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117 Node(unsigned int Type, std::unique_ptr<Document> &, StringRef Anchor,
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118 StringRef Tag);
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119
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120 /// \brief Get the value of the anchor attached to this node. If it does not
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121 /// have one, getAnchor().size() will be 0.
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122 StringRef getAnchor() const { return Anchor; }
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123
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124 /// \brief Get the tag as it was written in the document. This does not
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125 /// perform tag resolution.
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126 StringRef getRawTag() const { return Tag; }
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127
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128 /// \brief Get the verbatium tag for a given Node. This performs tag resoluton
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129 /// and substitution.
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130 std::string getVerbatimTag() const;
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131
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132 SMRange getSourceRange() const { return SourceRange; }
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133 void setSourceRange(SMRange SR) { SourceRange = SR; }
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134
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135 // These functions forward to Document and Scanner.
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136 Token &peekNext();
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137 Token getNext();
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138 Node *parseBlockNode();
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139 BumpPtrAllocator &getAllocator();
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140 void setError(const Twine &Message, Token &Location) const;
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141 bool failed() const;
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142
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143 virtual void skip() {}
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144
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145 unsigned int getType() const { return TypeID; }
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146
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147 void *operator new(size_t Size, BumpPtrAllocator &Alloc,
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148 size_t Alignment = 16) throw() {
0
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149 return Alloc.Allocate(Size, Alignment);
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150 }
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151
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152 void operator delete(void *Ptr, BumpPtrAllocator &Alloc, size_t Size) throw() {
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153 Alloc.Deallocate(Ptr, Size);
0
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154 }
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155
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156 protected:
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157 std::unique_ptr<Document> &Doc;
0
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158 SMRange SourceRange;
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159
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160 void operator delete(void *) throw() {}
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161
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162 virtual ~Node() {}
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163
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164 private:
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165 unsigned int TypeID;
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166 StringRef Anchor;
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167 /// \brief The tag as typed in the document.
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168 StringRef Tag;
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169 };
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170
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171 /// \brief A null value.
0
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172 ///
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173 /// Example:
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174 /// !!null null
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175 class NullNode : public Node {
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176 void anchor() override;
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177
0
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178 public:
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179 NullNode(std::unique_ptr<Document> &D)
0
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180 : Node(NK_Null, D, StringRef(), StringRef()) {}
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181
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182 static inline bool classof(const Node *N) { return N->getType() == NK_Null; }
0
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183 };
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184
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185 /// \brief A scalar node is an opaque datum that can be presented as a
0
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186 /// series of zero or more Unicode scalar values.
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187 ///
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188 /// Example:
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189 /// Adena
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190 class ScalarNode : public Node {
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191 void anchor() override;
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192
0
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193 public:
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194 ScalarNode(std::unique_ptr<Document> &D, StringRef Anchor, StringRef Tag,
0
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195 StringRef Val)
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196 : Node(NK_Scalar, D, Anchor, Tag), Value(Val) {
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197 SMLoc Start = SMLoc::getFromPointer(Val.begin());
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198 SMLoc End = SMLoc::getFromPointer(Val.end());
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199 SourceRange = SMRange(Start, End);
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200 }
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201
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202 // Return Value without any escaping or folding or other fun YAML stuff. This
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203 // is the exact bytes that are contained in the file (after conversion to
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204 // utf8).
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205 StringRef getRawValue() const { return Value; }
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206
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207 /// \brief Gets the value of this node as a StringRef.
0
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208 ///
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209 /// \param Storage is used to store the content of the returned StringRef iff
0
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210 /// it requires any modification from how it appeared in the source.
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211 /// This happens with escaped characters and multi-line literals.
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212 StringRef getValue(SmallVectorImpl<char> &Storage) const;
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213
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214 static inline bool classof(const Node *N) {
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215 return N->getType() == NK_Scalar;
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216 }
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217
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218 private:
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219 StringRef Value;
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220
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221 StringRef unescapeDoubleQuoted(StringRef UnquotedValue,
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222 StringRef::size_type Start,
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223 SmallVectorImpl<char> &Storage) const;
0
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224 };
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225
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226 /// \brief A key and value pair. While not technically a Node under the YAML
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227 /// representation graph, it is easier to treat them this way.
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228 ///
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229 /// TODO: Consider making this not a child of Node.
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230 ///
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231 /// Example:
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232 /// Section: .text
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233 class KeyValueNode : public Node {
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234 void anchor() override;
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235
0
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236 public:
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237 KeyValueNode(std::unique_ptr<Document> &D)
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238 : Node(NK_KeyValue, D, StringRef(), StringRef()), Key(nullptr),
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239 Value(nullptr) {}
0
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240
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241 /// \brief Parse and return the key.
0
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242 ///
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243 /// This may be called multiple times.
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244 ///
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245 /// \returns The key, or nullptr if failed() == true.
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246 Node *getKey();
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247
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248 /// \brief Parse and return the value.
0
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249 ///
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250 /// This may be called multiple times.
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251 ///
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252 /// \returns The value, or nullptr if failed() == true.
0
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253 Node *getValue();
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254
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255 void skip() override {
0
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256 getKey()->skip();
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257 getValue()->skip();
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258 }
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259
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260 static inline bool classof(const Node *N) {
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261 return N->getType() == NK_KeyValue;
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262 }
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263
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264 private:
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265 Node *Key;
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266 Node *Value;
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267 };
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268
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269 /// \brief This is an iterator abstraction over YAML collections shared by both
0
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270 /// sequences and maps.
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271 ///
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272 /// BaseT must have a ValueT* member named CurrentEntry and a member function
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273 /// increment() which must set CurrentEntry to 0 to create an end iterator.
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274 template <class BaseT, class ValueT>
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275 class basic_collection_iterator
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276 : public std::iterator<std::forward_iterator_tag, ValueT> {
0
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277 public:
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278 basic_collection_iterator() : Base(nullptr) {}
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279 basic_collection_iterator(BaseT *B) : Base(B) {}
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280
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281 ValueT *operator->() const {
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282 assert(Base && Base->CurrentEntry && "Attempted to access end iterator!");
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283 return Base->CurrentEntry;
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284 }
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285
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286 ValueT &operator*() const {
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287 assert(Base && Base->CurrentEntry &&
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288 "Attempted to dereference end iterator!");
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289 return *Base->CurrentEntry;
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290 }
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291
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292 operator ValueT *() const {
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293 assert(Base && Base->CurrentEntry && "Attempted to access end iterator!");
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294 return Base->CurrentEntry;
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295 }
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296
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297 bool operator!=(const basic_collection_iterator &Other) const {
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298 if (Base != Other.Base)
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299 return true;
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300 return (Base && Other.Base) &&
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301 Base->CurrentEntry != Other.Base->CurrentEntry;
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302 }
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303
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304 basic_collection_iterator &operator++() {
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305 assert(Base && "Attempted to advance iterator past end!");
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306 Base->increment();
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307 // Create an end iterator.
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308 if (!Base->CurrentEntry)
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309 Base = nullptr;
0
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310 return *this;
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311 }
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312
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313 private:
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314 BaseT *Base;
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315 };
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316
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317 // The following two templates are used for both MappingNode and Sequence Node.
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318 template <class CollectionType>
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319 typename CollectionType::iterator begin(CollectionType &C) {
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320 assert(C.IsAtBeginning && "You may only iterate over a collection once!");
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321 C.IsAtBeginning = false;
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322 typename CollectionType::iterator ret(&C);
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323 ++ret;
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324 return ret;
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325 }
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326
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327 template <class CollectionType> void skip(CollectionType &C) {
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328 // TODO: support skipping from the middle of a parsed collection ;/
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329 assert((C.IsAtBeginning || C.IsAtEnd) && "Cannot skip mid parse!");
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330 if (C.IsAtBeginning)
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331 for (typename CollectionType::iterator i = begin(C), e = C.end(); i != e;
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332 ++i)
0
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333 i->skip();
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334 }
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335
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336 /// \brief Represents a YAML map created from either a block map for a flow map.
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337 ///
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338 /// This parses the YAML stream as increment() is called.
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339 ///
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340 /// Example:
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341 /// Name: _main
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342 /// Scope: Global
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343 class MappingNode : public Node {
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344 void anchor() override;
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345
0
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346 public:
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347 enum MappingType {
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348 MT_Block,
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349 MT_Flow,
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350 MT_Inline ///< An inline mapping node is used for "[key: value]".
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351 };
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352
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353 MappingNode(std::unique_ptr<Document> &D, StringRef Anchor, StringRef Tag,
0
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354 MappingType MT)
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355 : Node(NK_Mapping, D, Anchor, Tag), Type(MT), IsAtBeginning(true),
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356 IsAtEnd(false), CurrentEntry(nullptr) {}
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357
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358 friend class basic_collection_iterator<MappingNode, KeyValueNode>;
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359 typedef basic_collection_iterator<MappingNode, KeyValueNode> iterator;
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360 template <class T> friend typename T::iterator yaml::begin(T &);
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361 template <class T> friend void yaml::skip(T &);
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362
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363 iterator begin() { return yaml::begin(*this); }
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364
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365 iterator end() { return iterator(); }
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366
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367 void skip() override { yaml::skip(*this); }
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368
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369 static inline bool classof(const Node *N) {
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370 return N->getType() == NK_Mapping;
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371 }
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372
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373 private:
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374 MappingType Type;
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375 bool IsAtBeginning;
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376 bool IsAtEnd;
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377 KeyValueNode *CurrentEntry;
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378
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379 void increment();
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380 };
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381
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382 /// \brief Represents a YAML sequence created from either a block sequence for a
0
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383 /// flow sequence.
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384 ///
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385 /// This parses the YAML stream as increment() is called.
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386 ///
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387 /// Example:
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388 /// - Hello
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389 /// - World
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390 class SequenceNode : public Node {
77
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391 void anchor() override;
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392
0
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393 public:
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394 enum SequenceType {
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395 ST_Block,
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396 ST_Flow,
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397 // Use for:
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398 //
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399 // key:
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400 // - val1
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401 // - val2
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402 //
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403 // As a BlockMappingEntry and BlockEnd are not created in this case.
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diff changeset
404 ST_Indentless
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405 };
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diff changeset
406
77
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parents: 0
diff changeset
407 SequenceNode(std::unique_ptr<Document> &D, StringRef Anchor, StringRef Tag,
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
408 SequenceType ST)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
409 : 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
410 IsAtEnd(false),
95c75e76d11b LLVM 3.4
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parents:
diff changeset
411 WasPreviousTokenFlowEntry(true), // Start with an imaginary ','.
77
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parents: 0
diff changeset
412 CurrentEntry(nullptr) {}
0
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 friend class basic_collection_iterator<SequenceNode, Node>;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
415 typedef basic_collection_iterator<SequenceNode, Node> iterator;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
416 template <class T> friend typename T::iterator yaml::begin(T &);
95c75e76d11b LLVM 3.4
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parents:
diff changeset
417 template <class T> friend void yaml::skip(T &);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
418
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
419 void increment();
95c75e76d11b LLVM 3.4
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parents:
diff changeset
420
77
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parents: 0
diff changeset
421 iterator begin() { return yaml::begin(*this); }
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
422
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
423 iterator end() { return iterator(); }
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parents:
diff changeset
424
77
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parents: 0
diff changeset
425 void skip() override { yaml::skip(*this); }
0
95c75e76d11b LLVM 3.4
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parents:
diff changeset
426
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
427 static inline bool classof(const Node *N) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
428 return N->getType() == NK_Sequence;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
429 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
430
95c75e76d11b LLVM 3.4
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parents:
diff changeset
431 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
432 SequenceType SeqType;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
433 bool IsAtBeginning;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
434 bool IsAtEnd;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
435 bool WasPreviousTokenFlowEntry;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
436 Node *CurrentEntry;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
437 };
95c75e76d11b LLVM 3.4
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parents:
diff changeset
438
77
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parents: 0
diff changeset
439 /// \brief Represents an alias to a Node with an anchor.
0
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 /// Example:
95c75e76d11b LLVM 3.4
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parents:
diff changeset
442 /// *AnchorName
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parents:
diff changeset
443 class AliasNode : public Node {
77
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parents: 0
diff changeset
444 void anchor() override;
54457678186b LLVM 3.6
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parents: 0
diff changeset
445
0
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parents:
diff changeset
446 public:
77
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parents: 0
diff changeset
447 AliasNode(std::unique_ptr<Document> &D, StringRef Val)
54457678186b LLVM 3.6
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parents: 0
diff changeset
448 : Node(NK_Alias, D, StringRef(), StringRef()), Name(Val) {}
0
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parents:
diff changeset
449
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
450 StringRef getName() const { return Name; }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
451 Node *getTarget();
95c75e76d11b LLVM 3.4
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parents:
diff changeset
452
77
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parents: 0
diff changeset
453 static inline bool classof(const Node *N) { return N->getType() == NK_Alias; }
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
454
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
455 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
456 StringRef Name;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
457 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
458
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
459 /// \brief A YAML Stream is a sequence of Documents. A document contains a root
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
460 /// node.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
461 class Document {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
462 public:
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
463 /// \brief Root for parsing a node. Returns a single node.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
464 Node *parseBlockNode();
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 Document(Stream &ParentStream);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
467
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
468 /// \brief Finish parsing the current document and return true if there are
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
469 /// more. Return false otherwise.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
470 bool skip();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
471
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
472 /// \brief Parse and return the root level node.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
473 Node *getRoot() {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
474 if (Root)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
475 return Root;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
476 return Root = 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
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
479 const std::map<StringRef, StringRef> &getTagMap() const { return TagMap; }
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
480
95c75e76d11b LLVM 3.4
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parents:
diff changeset
481 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
482 friend class Node;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
483 friend class document_iterator;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
484
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
485 /// \brief Stream to read tokens from.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
486 Stream &stream;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
487
77
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parents: 0
diff changeset
488 /// \brief Used to allocate nodes to. All are destroyed without calling their
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
489 /// destructor when the document is destroyed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
490 BumpPtrAllocator NodeAllocator;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
491
77
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parents: 0
diff changeset
492 /// \brief The root node. Used to support skipping a partially parsed
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
493 /// document.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
494 Node *Root;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
495
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
496 /// \brief Maps tag prefixes to their expansion.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
497 std::map<StringRef, StringRef> TagMap;
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 Token &peekNext();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
500 Token getNext();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
501 void setError(const Twine &Message, Token &Location) const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
502 bool failed() const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
503
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
504 /// \brief Parse %BLAH directives and return true if any were encountered.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
505 bool parseDirectives();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
506
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
507 /// \brief Parse %YAML
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
508 void parseYAMLDirective();
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 Parse %TAG
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
511 void parseTAGDirective();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
512
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
513 /// \brief Consume the next token and error if it is not \a TK.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
514 bool expectToken(int TK);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
515 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
516
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
517 /// \brief Iterator abstraction for Documents over a Stream.
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
518 class document_iterator {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
519 public:
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
520 document_iterator() : Doc(nullptr) {}
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
521 document_iterator(std::unique_ptr<Document> &D) : Doc(&D) {}
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
522
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
523 bool operator==(const document_iterator &Other) {
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
524 if (isAtEnd() || Other.isAtEnd())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
525 return isAtEnd() && Other.isAtEnd();
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 return Doc == Other.Doc;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
528 }
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
529 bool operator!=(const document_iterator &Other) { return !(*this == Other); }
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
530
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
531 document_iterator operator++() {
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
532 assert(Doc && "incrementing iterator past the end.");
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
533 if (!(*Doc)->skip()) {
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
534 Doc->reset(nullptr);
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
535 } else {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
536 Stream &S = (*Doc)->stream;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
537 Doc->reset(new Document(S));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
538 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
539 return *this;
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
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
542 Document &operator*() { return *Doc->get(); }
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543
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544 std::unique_ptr<Document> &operator->() { return *Doc; }
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545
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546 private:
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547 bool isAtEnd() const { return !Doc || !*Doc; }
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548
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549 std::unique_ptr<Document> *Doc;
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550 };
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551
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552 } // End namespace yaml.
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553
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554 } // End namespace llvm.
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555
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556 #endif