1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Linq;
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25 | using System.Text;
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26 | using System.Text.RegularExpressions;
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27 |
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28 | namespace HeuristicLab.Persistence.Auxiliary {
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29 |
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30 | /// <summary>
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31 | /// Error during type name parsing, thrown by <see cref="TypeNameParser"/>.
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32 | /// </summary>
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33 | public class ParseError : Exception {
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34 |
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35 | /// <summary>
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36 | /// Initializes a new instance of the <see cref="ParseError"/> class.
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37 | /// </summary>
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38 | /// <param name="message">The message.</param>
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39 | public ParseError(string message) : base(message) { }
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40 | }
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41 |
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42 | /// <summary>
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43 | /// Parse a .NET type name using the following grammar:
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44 | ///
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45 | /// <code>
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46 | /// TypeSpec := SimpleTypeSpec '&'?
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47 | ///
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48 | /// SimpleTypeSpec := (IDENTIFIER '.')*
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49 | /// (IDENTIFIER '`\d+'? '+')*
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50 | /// IDENTIFIER
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51 | /// ( '`\d+[' Generics ']' )?
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52 | /// (\*|\[(\d+\.\.\d+|\d+\.\.\.|(|\*)(,(|\*))*)\])*
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53 | /// (',\s*' IDENTIFIER (',\s*' AssemblyProperty)* )?
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54 | ///
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55 | /// Generics := '[' SimpleTypeSpec ']' (',[' SimpleTypeSpec ']')
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56 | ///
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57 | /// AssemblyProperty := 'Version=' Version
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58 | /// | 'PublicKey(Token)?=[a-fA-F0-9]+'
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59 | /// | 'Culture=[a-zA-F0-9]+'
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60 | ///
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61 | /// Version := \d+\.\d+\.\d+\.\d+
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62 | ///
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63 | /// IDENTIFIER = [_a-zA-Z][_a-ZA-Z0-9]*
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64 | /// </code>
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65 | /// </summary>
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66 | public class TypeNameParser {
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67 |
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68 | /*
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69 | TypeSpec := SimpleTypeSpec '&'?
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70 |
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71 | SimpleTypeSpec := (IDENTIFIER '.')*
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72 | (IDENTIFIER '`\d+'?
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73 | ( '+' IDENTIFIER '`\d+'? )*
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74 | ( '[' Generics ']' )?
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75 | (\*|\[(\d+\.\.\d+|\d+\.\.\.|(|\*)(,(|\*))*)\])*
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76 | (',\s*' IDENTIFIER (',\s*' AssemblyProperty)* )?
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77 |
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78 | Generics := '[' SimpleTypeSpec ']' (',[' SimpleTypeSpec ']')*
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79 |
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80 | AssemblyProperty := 'Version=' Version
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81 | | 'PublicKey(Token)?=[a-fA-F0-9]+'
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82 | | 'Culture=[a-zA-F0-9]+'
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83 |
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84 | Version := \d+\.\d+\.\d+\.\d+
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85 |
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86 | IDENTIFIER = [_a-zA-Z][_a-ZA-Z0-9]*
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87 | */
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88 |
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89 |
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90 | private class Token {
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91 | public enum Symbol { None, Dash, Ampersand, Dot, Plus, Comma, OpenBracket, CloseBracket, Asterisk, Space, Equals, Backtick }
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92 | private static readonly Dictionary<string, Symbol> TOKENS =
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93 | new Dictionary<string, Symbol> {
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94 | {"-", Symbol.Dash},
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95 | {"&", Symbol.Ampersand},
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96 | {".", Symbol.Dot},
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97 | {"+", Symbol.Plus},
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98 | {",", Symbol.Comma},
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99 | {"[", Symbol.OpenBracket},
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100 | {"]", Symbol.CloseBracket},
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101 | {"*", Symbol.Asterisk},
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102 | {" ", Symbol.Space},
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103 | {"=", Symbol.Equals},
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104 | {"`", Symbol.Backtick}};
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105 | private static readonly Regex NumberRegex = new Regex("^\\d+$");
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106 | private static readonly Regex IdentifierRegex = new Regex("^[_a-zA-Z][_a-zA-Z0-9]*$");
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107 | private static readonly Regex TokenRegex = new Regex("[-&.+,\\[\\]* =`]|[a-f0-9]+|\\d+|[_a-zA-Z][_a-zA-Z0-9]*");
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108 | public Symbol Name { get; private set; }
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109 | public string Value { get; private set; }
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110 | public bool IsIdentifier { get; private set; }
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111 | public int? Number { get; private set; }
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112 | public int Position { get; private set; }
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113 | private Token(string value, int pos) {
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114 | Position = pos;
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115 | Name = Symbol.None;
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116 | if (TOKENS.ContainsKey(value)) {
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117 | Name = TOKENS[value];
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118 | } else if (NumberRegex.IsMatch(value)) {
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119 | Number = int.Parse(value);
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120 | } else {
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121 | Value = value;
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122 | IsIdentifier = IdentifierRegex.IsMatch(value);
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123 | }
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124 | }
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125 | public static IEnumerable<Token> Tokenize(string s) {
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126 | int pos = 0;
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127 | foreach (Match m in TokenRegex.Matches(s)) {
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128 | yield return new Token(m.Value, pos);
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129 | pos += m.Length;
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130 | }
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131 | }
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132 | public override string ToString() {
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133 | if (Name != Symbol.None)
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134 | return "Token(" + Name + ")";
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135 | if (Value != null)
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136 | return "\"" + Value + "\"";
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137 | if (Number != null)
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138 | return Number.ToString();
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139 | return "<empty>";
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140 | }
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141 | }
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142 |
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143 | private Queue<Token> tokens;
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144 | private int Position {
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145 | get {
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146 | if (tokens.Count == 0)
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147 | return -1;
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148 | else
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149 | return tokens.Peek().Position;
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150 | }
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151 | }
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152 |
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153 | private TypeNameParser(string s) {
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154 | tokens = new Queue<Token>(Token.Tokenize(s));
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155 | }
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156 |
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157 | /// <summary>
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158 | /// Parses the specified typename string as obtained by
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159 | /// <c>System.Object.GetType().FullName</c> or
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160 | /// <c>System.Object.GetType().AssemblyQualifiedName</c>.
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161 | /// </summary>
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162 | /// <param name="s">The typename string.</param>
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163 | /// <returns>A <see cref="TypeName"/> representing the type name.</returns>
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164 | public static TypeName Parse(string s) {
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165 | TypeNameParser p = new TypeNameParser(s);
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166 | try {
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167 | return p.TransformTypeSpec();
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168 | }
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169 | catch (ParseError x) {
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170 | if (p.Position > 0)
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171 | throw new ParseError(String.Format(
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172 | "Could not parse typename: {0}\n\"{1}====>{2}<===={3}",
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173 | x.Message,
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174 | s.Substring(0, p.Position),
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175 | s[p.Position],
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176 | s.Substring(p.Position, s.Length - p.Position)));
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177 | else
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178 | throw new ParseError(String.Format(
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179 | "Could not parse typenname \"{0}\" at end of input: {1}",
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180 | s,
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181 | x.Message));
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182 | }
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183 | }
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184 |
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185 | private TypeName TransformTypeSpec() {
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186 | TypeName t = TransformSimpleTypeSpec();
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187 | t.IsReference = ConsumeToken(Token.Symbol.Ampersand);
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188 | return t;
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189 | }
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190 |
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191 | private TypeName TransformSimpleTypeSpec() {
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192 | var nameSpace = new List<string> { ConsumeIdentifier() };
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193 | while (ConsumeToken(Token.Symbol.Dot))
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194 | nameSpace.Add(ConsumeIdentifier());
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195 | var className = new List<string>();
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196 | if (nameSpace.Count > 0) {
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197 | className.Add(nameSpace[nameSpace.Count - 1]);
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198 | nameSpace.RemoveAt(nameSpace.Count - 1);
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199 | }
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200 | var genericArgCounts = new List<int> {
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201 | ConsumeToken(Token.Symbol.Backtick) ? ConsumeNumber() : 0
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202 | };
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203 | while (ConsumeToken(Token.Symbol.Plus)) {
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204 | className.Add(ConsumeIdentifier());
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205 | genericArgCounts.Add(ConsumeToken(Token.Symbol.Backtick) ? ConsumeNumber() : 0);
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206 | }
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207 | var nGenericArgs = genericArgCounts.Sum();
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208 | var typeName = new TypeName(
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209 | string.Join(".", nameSpace.ToArray()),
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210 | string.Join("+", className.ToArray()),
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211 | nGenericArgs > genericArgCounts.Last() ? genericArgCounts : null);
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212 | if (nGenericArgs > 0 && ConsumeToken(Token.Symbol.OpenBracket, true)) {
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213 | typeName.GenericArgs.AddRange(TransformGenerics());
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214 | ConsumeToken(Token.Symbol.CloseBracket, true);
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215 | }
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216 | var pointerOrArray = new StringBuilder();
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217 | while (true) {
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218 | if (ConsumeToken(Token.Symbol.Asterisk)) {
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219 | pointerOrArray.Append("*");
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220 | } else if (ConsumeToken(Token.Symbol.OpenBracket)) {
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221 | pointerOrArray.Append('[');
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222 | ParseDimension(pointerOrArray);
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223 | while (ConsumeToken(Token.Symbol.Comma)) {
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224 | pointerOrArray.Append(",");
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225 | ParseDimension(pointerOrArray);
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226 | }
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227 | ConsumeToken(Token.Symbol.CloseBracket, true);
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228 | pointerOrArray.Append(']');
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229 | } else {
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230 | break;
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231 | }
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232 | }
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233 | typeName.MemoryMagic = pointerOrArray.ToString();
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234 | if (ConsumeComma()) {
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235 | var sb = new StringBuilder();
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236 | sb.Append(ConsumeIdentifier());
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237 | while (CanConsumeToken(Token.Symbol.Dot) ||
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238 | CanConsumeToken(Token.Symbol.Dash) ||
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239 | CanConsumeNumber() ||
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240 | CanConsumeIdentifier()) {
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241 | if (ConsumeToken(Token.Symbol.Dot))
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242 | sb.Append('.');
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243 | else if (ConsumeToken(Token.Symbol.Dash))
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244 | sb.Append('-');
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245 | else if (CanConsumeNumber())
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246 | sb.Append(ConsumeNumber());
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247 | else
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248 | sb.Append(ConsumeIdentifier());
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249 | }
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250 | typeName.AssemblyName = sb.ToString();
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251 | while (ConsumeComma()) {
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252 | KeyValuePair<string, string> property =
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253 | TransformAssemblyProperty();
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254 | typeName.AssemblyAttribues.Add(property.Key, property.Value);
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255 | }
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256 | }
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257 | return typeName;
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258 | }
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259 |
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260 | private void ParseDimension(StringBuilder sb) {
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261 | if (ConsumeToken(Token.Symbol.Asterisk)) {
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262 | sb.Append("*");
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263 | } else if (CanConsumeNumber()) {
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264 | sb.Append(ConsumeNumber());
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265 | ConsumeToken(Token.Symbol.Dot, true);
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266 | ConsumeToken(Token.Symbol.Dot, true);
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267 | if (ConsumeToken(Token.Symbol.Dot)) {
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268 | sb.Append("...");
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269 | } else {
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270 | sb.Append("..").Append(ConsumeNumber());
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271 | }
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272 | }
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273 | }
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274 |
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275 | private IEnumerable<TypeName> TransformGenerics() {
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276 | ConsumeToken(Token.Symbol.OpenBracket, true);
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277 | yield return TransformSimpleTypeSpec();
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278 | ConsumeToken(Token.Symbol.CloseBracket, true);
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279 | while (ConsumeToken(Token.Symbol.Comma)) {
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280 | ConsumeToken(Token.Symbol.OpenBracket, true);
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281 | yield return TransformSimpleTypeSpec();
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282 | ConsumeToken(Token.Symbol.CloseBracket, true);
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283 | }
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284 | }
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285 |
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286 | private KeyValuePair<string, string> TransformAssemblyProperty() {
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287 | if (ConsumeIdentifier("Version")) {
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288 | ConsumeToken(Token.Symbol.Equals, true);
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289 | return new KeyValuePair<string, string>(
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290 | "Version",
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291 | TransformVersion());
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292 | } else if (ConsumeIdentifier("PublicKey")) {
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293 | return ConsumeAssignment("PublicKey");
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294 | } else if (ConsumeIdentifier("PublicKeyToken")) {
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295 | return ConsumeAssignment("PublicKeyToken");
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296 | } else if (ConsumeIdentifier("Culture")) {
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297 | return ConsumeAssignment("Culture");
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298 | } else if (ConsumeIdentifier("Custom")) {
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299 | return ConsumeAssignment("Custom");
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300 | } else {
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301 | throw new ParseError(String.Format(
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302 | "Invalid assembly property \"{0}\"",
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303 | tokens.Peek().ToString()));
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304 | }
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305 | }
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306 |
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307 | private KeyValuePair<string, string> ConsumeAssignment(string name) {
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308 | ConsumeToken(Token.Symbol.Equals, true);
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309 | return new KeyValuePair<string, string>(name, ConsumeToken());
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310 | }
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311 |
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312 | private string TransformVersion() {
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313 | StringBuilder version = new StringBuilder();
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314 | version.Append(ConsumeNumber());
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315 | ConsumeToken(Token.Symbol.Dot);
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316 | version.Append('.').Append(ConsumeNumber());
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317 | ConsumeToken(Token.Symbol.Dot);
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318 | version.Append('.').Append(ConsumeNumber());
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319 | ConsumeToken(Token.Symbol.Dot);
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320 | version.Append('.').Append(ConsumeNumber());
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321 | return version.ToString();
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322 | }
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323 |
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324 | private bool CanConsumeNumber() {
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325 | if (tokens.Count == 0)
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326 | return false;
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327 | return tokens.Peek().Number != null;
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328 | }
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329 |
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330 | private int ConsumeNumber() {
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331 | if (tokens.Count == 0)
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332 | throw new ParseError("End of input while expecting number");
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333 | if (tokens.Peek().Number != null)
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334 | return (int)tokens.Dequeue().Number;
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335 | throw new ParseError(string.Format(
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336 | "Number expected, found \"{0}\" instead",
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337 | tokens.Peek().ToString()));
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338 | }
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339 |
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340 | private bool ConsumeIdentifier(string value) {
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341 | if (tokens.Count == 0)
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342 | return false;
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343 | if (tokens.Peek().Value == value && tokens.Peek().IsIdentifier) {
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344 | tokens.Dequeue();
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345 | return true;
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346 | } else {
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347 | return false;
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348 | }
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349 | }
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350 |
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351 | private bool CanConsumeIdentifier() {
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352 | return tokens.Count > 0 && tokens.Peek().Value != null;
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353 | }
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354 |
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355 | private string ConsumeIdentifier() {
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356 | if (tokens.Count == 0)
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357 | throw new ParseError("End of input while expecting identifier");
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358 | if (tokens.Peek().Value != null && tokens.Peek().IsIdentifier)
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359 | return tokens.Dequeue().Value;
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360 | throw new ParseError(String.Format(
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361 | "Identifier expected, found \"{0}\" instead",
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362 | tokens.Peek().ToString()));
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363 | }
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364 |
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365 | private string ConsumeToken() {
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366 | if (tokens.Count == 0)
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367 | throw new ParseError("End of input while expecting token");
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368 | if (tokens.Peek().Value != null)
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369 | return tokens.Dequeue().Value;
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370 | throw new ParseError(String.Format(
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371 | "Token expected, found \"{0}\" instead",
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372 | tokens.Peek().ToString()));
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373 | }
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374 |
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375 | private bool ConsumeComma() {
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376 | if (ConsumeToken(Token.Symbol.Comma)) {
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377 | while (ConsumeToken(Token.Symbol.Space)) ;
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378 | return true;
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379 | } else {
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380 | return false;
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381 | }
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382 | }
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383 |
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384 | private bool ConsumeToken(Token.Symbol symbol) {
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385 | return ConsumeToken(symbol, false);
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386 | }
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387 |
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388 | private bool CanConsumeToken(Token.Symbol symbol) {
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389 | if (tokens.Count == 0)
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390 | return false;
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391 | if (tokens.Peek().Name == symbol)
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392 | return true;
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393 | return false;
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394 | }
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395 |
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396 | private bool ConsumeToken(Token.Symbol symbol, bool force) {
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397 | if (tokens.Count == 0)
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398 | if (force)
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399 | throw new ParseError(String.Format(
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400 | "end of input while expecting token \"{0}\"",
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401 | symbol));
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402 | else
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403 | return false;
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404 | if (tokens.Peek().Name == symbol) {
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405 | tokens.Dequeue();
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406 | return true;
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407 | } else if (force) {
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408 | throw new ParseError(String.Format(
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409 | "expected \"{0}\" found \"{1}\"",
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410 | symbol,
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411 | tokens.Peek().ToString()));
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412 | } else {
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413 | return false;
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414 | }
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415 | }
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416 | }
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417 | } |
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