| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2015 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()));
|
|---|
| 412 | } else {
|
|---|
| 413 | return false;
|
|---|
| 414 | }
|
|---|
| 415 | }
|
|---|
| 416 | }
|
|---|
| 417 | } |
|---|
