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annotate trunk/src/dil/lexer/IdTable.d @ 707:efa5fcb9aa14

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Added semantic code related to enums. Added member symbol to EnumMemberDeclaration. Added genAnonEnumID() to IdTable. Added class EnumMember. Wrote code for SemanticPass2.visit(EnumDeclaration). Revised code in SemanticPass1.visit(EnumDeclaration).
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Tue, 29 Jan 2008 01:07:39 +0100
parents 07946b379006
children 140469ecb90e
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
601
9f96fd51cb41 Moved dil.IdTable to dil.lexer.IdTable.
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5 module dil.lexer.IdTable;
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4d50267f59c9 Moved dil.TokensEnum to dil.lexer.TokensEnum.
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6
4d50267f59c9 Moved dil.TokensEnum to dil.lexer.TokensEnum.
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7 import dil.lexer.TokensEnum;
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fc351756cc84 Moved dil.IdentsGenerator to dil.lexer.IdentsGenerator.
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8 import dil.lexer.IdentsGenerator;
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9 import dil.lexer.Keywords;
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10 import common;
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11
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041eae272362 Moved dil.Identifier to dil.lexer.Identifier.
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12 public import dil.lexer.Identifier;
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13 public import dil.lexer.IdentsEnum;
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9076c4cea2a4 Changed occur. of Token* to Identifier* and refactored Parser.
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14
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15 struct Ident
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16 {
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17 const static
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18 {
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19 mixin(generateIdentMembers());
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20 }
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21
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22 static Identifier*[] allIds()
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23 {
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24 return __allIds;
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25 }
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26 }
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28 /++
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29 Global table for hoarding and retrieving identifiers.
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30 +/
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31 struct IdTable
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32 {
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33 static:
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34 /// A set of common, predefined identifiers for fast lookups.
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35 private Identifier*[string] staticTable;
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36 /// A table that grows with every newly found, unique identifier.
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37 /// Access must be synchronized.
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38 private Identifier*[string] growingTable;
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39
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40 /// Initializes the static table.
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41 static this()
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42 {
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43 // Load keywords and pre-defined identifiers into the static table.
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44 foreach (ref k; keywords)
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45 staticTable[k.str] = &k;
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46 foreach (id; Ident.allIds())
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47 staticTable[id.str] = id;
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48 staticTable.rehash;
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49 }
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50
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51 /// Looks in both tables.
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52 Identifier* lookup(string idString)
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53 {
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54 auto id = inStatic(idString);
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55 if (id)
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56 return id;
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57 return inGrowing(idString);
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58 }
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59
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60 /// Look up idString in the static table.
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61 Identifier* inStatic(string idString)
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62 {
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63 auto id = idString in staticTable;
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64 return id ? *id : null;
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65 }
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66
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67 alias Identifier* function(string idString) LookupFunction;
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68 /// Look up idString in the growing table.
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69 LookupFunction inGrowing = &_inGrowing_unsafe; // Default to unsafe function.
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70
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71 /++
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72 Set the thread safety mode of this table.
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73 Call this function only if you can be sure
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74 that this table is not being accessed
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75 (like during lexing, parsing and semantic phase.)
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76 +/
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77 void setThreadsafe(bool b)
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78 {
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79 if (b)
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80 IdTable.inGrowing = &_inGrowing_safe;
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81 else
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82 IdTable.inGrowing = &_inGrowing_unsafe;
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83 }
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84
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85 /++
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86 Returns the Identifier for idString.
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87 Adds idString to the table if not found.
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88 +/
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89 private Identifier* _inGrowing_unsafe(string idString)
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90 out(id)
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91 { assert(id !is null); }
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92 body
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93 {
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94 auto id = idString in growingTable;
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95 if (id)
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96 return *id;
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97 auto newID = Identifier(idString, TOK.Identifier);
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98 growingTable[idString] = newID;
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99 return newID;
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100 }
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101
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102 /++
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103 Returns the Identifier for idString.
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104 Adds idString to the table if not found.
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105 Access to the data structure is synchronized.
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106 +/
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107 private Identifier* _inGrowing_safe(string idString)
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108 {
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109 synchronized
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110 return _inGrowing_unsafe(idString);
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111 }
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112
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113 /+
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114 Identifier* addIdentifiers(char[][] idStrings)
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115 {
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116 auto ids = new Identifier*[idStrings.length];
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117 foreach (i, idString; idStrings)
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118 {
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119 Identifier** id = idString in tabulatedIds;
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120 if (!id)
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121 {
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122 auto newID = Identifier(TOK.Identifier, idString);
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123 tabulatedIds[idString] = newID;
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124 id = &newID;
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125 }
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126 ids[i] = *id;
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127 }
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128 }
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129 +/
618
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130
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131 static uint anonCount;
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132 Identifier* genAnonymousID(char[] str)
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133 {
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134 ++anonCount;
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135 auto x = anonCount;
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136 // Convert count to a string and append it to str.
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137 do
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138 str = cast(char)('0' + (x % 10)) ~ str;
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139 while (x /= 10)
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140 return Identifier(str, TOK.Identifier);
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141 }
707
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142
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143 Identifier* genAnonEnumID()
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144 {
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145 return genAnonymousID("__anonenum");
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146 }
502
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147 }
549
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148
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149 unittest
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150 {
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151 // TODO: write benchmark.
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152 // Single table
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153
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154 // Single table. synchronized
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155
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156 // Two tables.
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157
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158 // Two tables. synchronized
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159 }