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1 module dmd.Statement;
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2
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3 import dmd.TryCatchStatement;
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4 import dmd.GotoStatement;
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5 import dmd.AsmStatement;
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6 import dmd.ScopeStatement;
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7 import dmd.DeclarationStatement;
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8 import dmd.CompoundStatement;
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9 import dmd.ReturnStatement;
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10 import dmd.IfStatement;
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11 import dmd.Scope;
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12 import dmd.Loc;
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13 import dmd.OutBuffer;
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14 import dmd.HdrGenState;
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15 import dmd.ArrayTypes;
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16 import dmd.Expression;
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17 import dmd.InterState;
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18 import dmd.InlineCostState;
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19 import dmd.InlineDoState;
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20 import dmd.InlineScanState;
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21 import dmd.IRState;
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22 import dmd.BE;
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23 import dmd.Global;
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24 import dmd.Util;
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25
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63
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26 template START()
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27 {
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28 enum START = q{
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29 if (istate.start)
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30 {
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31 if (istate.start != this)
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32 return null;
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33 istate.start = null;
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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 class Statement
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39 {
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40 Loc loc;
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41
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42 this(Loc loc)
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43 {
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44 this.loc = loc;
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45 }
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46
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47 Statement syntaxCopy()
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48 {
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49 assert(false);
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50 }
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51
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52 void print()
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53 {
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54 assert(false);
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55 }
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56
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57 string toChars()
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58 {
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59 assert(false);
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60 }
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61
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62 void error(T...)(string format, T t)
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63 {
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58
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64 .error(loc, format, t);
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0
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65 }
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66
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67 void warning(T...)(string format, T t)
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68 {
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69 if (global.params.warnings && !global.gag)
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70 {
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71 writef("warning - ");
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72 .error(loc, format, t);
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73 }
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74 }
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75
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76 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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77 {
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78 assert(false);
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79 }
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80
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81 TryCatchStatement isTryCatchStatement() { return null; }
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82
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83 GotoStatement isGotoStatement() { return null; }
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84
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85 AsmStatement isAsmStatement() { return null; }
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86
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87 version (_DH) {
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88 int incontract;
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89 }
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90 ScopeStatement isScopeStatement() { return null; }
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91
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92 Statement semantic(Scope sc)
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93 {
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94 assert(false);
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95 }
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96
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97 Statement semanticScope(Scope sc, Statement sbreak, Statement scontinue)
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98 {
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99 Scope scd;
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100 Statement s;
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101
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102 scd = sc.push();
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103 if (sbreak)
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104 scd.sbreak = sbreak;
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105 if (scontinue)
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106 scd.scontinue = scontinue;
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107 s = semantic(scd);
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108 scd.pop();
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109 return s;
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110 }
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111
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112 bool hasBreak()
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113 {
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114 assert(false);
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115 }
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116
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117 bool hasContinue()
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118 {
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119 assert(false);
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120 }
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121
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122 bool usesEH()
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123 {
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124 assert(false);
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125 }
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126
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127 BE blockExit()
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128 {
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129 assert(false);
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130 }
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131
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132 // true if statement 'comes from' somewhere else, like a goto
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133 bool comeFrom()
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134 {
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135 //printf("Statement::comeFrom()\n");
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136 return false;
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137 }
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138
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139 // Return TRUE if statement has no code in it
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140 bool isEmpty()
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141 {
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142 //printf("Statement::isEmpty()\n");
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143 return false;
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144 }
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145
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146 /****************************************
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147 * If this statement has code that needs to run in a finally clause
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148 * at the end of the current scope, return that code in the form of
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149 * a Statement.
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150 * Output:
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151 * *sentry code executed upon entry to the scope
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152 * *sexception code executed upon exit from the scope via exception
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153 * *sfinally code executed in finally block
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154 */
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155 void scopeCode(Scope sc, Statement* sentry, Statement* sexception, Statement* sfinally)
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156 {
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157 //printf("Statement::scopeCode()\n");
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158 //print();
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159 *sentry = null;
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160 *sexception = null;
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161 *sfinally = null;
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162 }
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163
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164 /*********************************
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165 * Flatten out the scope by presenting the statement
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166 * as an array of statements.
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167 * Returns NULL if no flattening necessary.
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168 */
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169 Statements flatten(Scope sc)
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170 {
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171 return null;
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172 }
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173
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63
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174 Expression interpret(InterState istate)
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175 {
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176 assert(false);
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177 }
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178
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179 int inlineCost(InlineCostState* ics)
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180 {
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181 return COST_MAX; // default is we can't inline it
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182 }
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183
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184 Expression doInline(InlineDoState ids)
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185 {
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186 assert(false);
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187 }
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188
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189 Statement inlineScan(InlineScanState* iss)
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190 {
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191 return this;
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192 }
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193
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194 // Back end
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195 void toIR(IRState* irs)
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196 {
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197 assert(false);
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198 }
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199
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200 // Avoid dynamic_cast
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201 DeclarationStatement isDeclarationStatement() { return null; }
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202 CompoundStatement isCompoundStatement() { return null; }
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203 ReturnStatement isReturnStatement() { return null; }
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204 IfStatement isIfStatement() { return null; }
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205 } |
