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annotate druntime/src/common/core/exception.d @ 1458:e0b2d67cfe7c

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Added druntime (this should be removed once it works).
author Robert Clipsham <robert@octarineparrot.com>
date Tue, 02 Jun 2009 17:43:06 +0100
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1458
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1 /**
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2 * The exception module defines all system-level exceptions and provides a
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3 * mechanism to alter system-level error handling.
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4 *
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5 * Copyright: Copyright Sean Kelly 2005 - 2009.
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6 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
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7 * Authors: Sean Kelly
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8 *
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9 * Copyright Sean Kelly 2005 - 2009.
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10 * Distributed under the Boost Software License, Version 1.0.
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11 * (See accompanying file LICENSE_1_0.txt or copy at
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12 * http://www.boost.org/LICENSE_1_0.txt)
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13 */
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14 module core.exception;
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15
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16
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17 private
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18 {
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19 alias void function( string file, size_t line, string msg = null ) assertHandlerType;
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20
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21 // Note that this is set on a per-thread basis (should it be global?)
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22 assertHandlerType assertHandler = null;
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23 }
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24
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25
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26 /**
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27 * Thrown on a range error.
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28 */
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29 class RangeError : Error
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30 {
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31 this( string file, size_t line )
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32 {
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33 super( "Range violation", file, line );
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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 /**
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39 * Thrown on an assert error.
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40 */
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41 class AssertError : Error
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42 {
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43 this( string file, size_t line )
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44 {
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45 super( "Assertion failure", file, line );
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46 }
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47
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48 this( string msg, string file, size_t line )
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49 {
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50 super( msg, file, line );
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51 }
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52 }
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53
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54
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55 /**
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56 * Thrown on finalize error.
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57 */
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58 class FinalizeError : Error
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59 {
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60 ClassInfo info;
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61
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62 this( ClassInfo c, Exception e = null )
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63 {
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64 super( "Finalization error", e );
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65 info = c;
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66 }
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67
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68 override string toString()
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69 {
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70 return "An exception was thrown while finalizing an instance of class " ~ info.name;
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71 }
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72 }
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73
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74
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75 /**
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76 * Thrown on hidden function error.
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77 */
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78 class HiddenFuncError : Error
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79 {
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80 this( ClassInfo ci )
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81 {
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82 super( "Hidden method called for " ~ ci.name );
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83 }
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84 }
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85
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86
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87 /**
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88 * Thrown on an out of memory error.
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89 */
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90 class OutOfMemoryError : Error
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91 {
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92 this( string file, size_t line )
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93 {
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94 super( "Memory allocation failed", file, line );
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95 }
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96
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97 override string toString()
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98 {
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99 return msg ? super.toString() : "Memory allocation failed";
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100 }
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101 }
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102
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103
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104 /**
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105 * Thrown on a switch error.
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106 */
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107 class SwitchError : Error
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108 {
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109 this( string file, size_t line )
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110 {
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111 super( "No appropriate switch clause found", file, line );
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112 }
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113 }
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114
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115
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116 /**
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117 * Thrown on a unicode conversion error.
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118 */
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119 class UnicodeException : Exception
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120 {
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121 size_t idx;
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122
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123 this( string msg, size_t idx )
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124 {
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125 super( msg );
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126 this.idx = idx;
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127 }
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128 }
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129
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130
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131 ///////////////////////////////////////////////////////////////////////////////
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132 // Overrides
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133 ///////////////////////////////////////////////////////////////////////////////
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134
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135
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136 /**
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137 * Overrides the default assert hander with a user-supplied version.
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138 *
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139 * Params:
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140 * h = The new assert handler. Set to null to use the default handler.
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141 */
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142 void setAssertHandler( assertHandlerType h )
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143 {
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144 assertHandler = h;
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145 }
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146
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147
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148 ///////////////////////////////////////////////////////////////////////////////
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149 // Overridable Callbacks
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150 ///////////////////////////////////////////////////////////////////////////////
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151
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152
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153 /**
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154 * A callback for assert errors in D. The user-supplied assert handler will
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155 * be called if one has been supplied, otherwise an AssertError will be thrown.
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156 *
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157 * Params:
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158 * file = The name of the file that signaled this error.
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159 * line = The line number on which this error occurred.
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160 */
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161 extern (C) void onAssertError( string file, size_t line )
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162 {
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163 if( assertHandler is null )
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164 throw new AssertError( file, line );
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165 assertHandler( file, line );
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166 }
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167
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168
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169 /**
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170 * A callback for assert errors in D. The user-supplied assert handler will
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171 * be called if one has been supplied, otherwise an AssertError will be thrown.
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172 *
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173 * Params:
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174 * file = The name of the file that signaled this error.
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175 * line = The line number on which this error occurred.
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176 * msg = An error message supplied by the user.
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177 */
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178 extern (C) void onAssertErrorMsg( string file, size_t line, string msg )
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179 {
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180 if( assertHandler is null )
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181 throw new AssertError( msg, file, line );
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182 assertHandler( file, line, msg );
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183 }
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184
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185
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186 ///////////////////////////////////////////////////////////////////////////////
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187 // Internal Error Callbacks
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188 ///////////////////////////////////////////////////////////////////////////////
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189
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190
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191 /**
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192 * A callback for array bounds errors in D. A RangeError will be thrown.
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193 *
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194 * Params:
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195 * file = The name of the file that signaled this error.
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196 * line = The line number on which this error occurred.
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197 *
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198 * Throws:
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199 * RangeError.
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200 */
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201 extern (C) void onRangeError( string file, size_t line )
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202 {
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203 throw new RangeError( file, line );
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204 }
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205
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206
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207 /**
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208 * A callback for finalize errors in D. A FinalizeError will be thrown.
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209 *
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210 * Params:
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211 * e = The exception thrown during finalization.
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212 *
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213 * Throws:
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214 * FinalizeError.
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215 */
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216 extern (C) void onFinalizeError( ClassInfo info, Exception ex )
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217 {
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218 throw new FinalizeError( info, ex );
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219 }
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220
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221
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222 /**
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223 * A callback for hidden function errors in D. A HiddenFuncError will be
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224 * thrown.
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225 *
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226 * Throws:
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227 * HiddenFuncError.
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228 */
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229 extern (C) void onHiddenFuncError( Object o )
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230 {
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231 throw new HiddenFuncError( o.classinfo );
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232 }
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233
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234
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235 /**
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236 * A callback for out of memory errors in D. An OutOfMemoryError will be
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237 * thrown.
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238 *
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239 * Throws:
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240 * OutOfMemoryError.
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241 */
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242 extern (C) void onOutOfMemoryError()
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243 {
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244 // NOTE: Since an out of memory condition exists, no allocation must occur
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245 // while generating this object.
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246 throw cast(OutOfMemoryError) cast(void*) OutOfMemoryError.classinfo.init;
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247 }
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248
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249
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250 /**
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251 * A callback for switch errors in D. A SwitchError will be thrown.
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252 *
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253 * Params:
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254 * file = The name of the file that signaled this error.
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255 * line = The line number on which this error occurred.
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256 *
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257 * Throws:
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258 * SwitchError.
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259 */
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260 extern (C) void onSwitchError( string file, size_t line )
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261 {
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262 throw new SwitchError( file, line );
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263 }
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264
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265
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266 /**
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267 * A callback for unicode errors in D. A UnicodeException will be thrown.
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268 *
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269 * Params:
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270 * msg = Information about the error.
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271 * idx = String index where this error was detected.
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272 *
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273 * Throws:
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274 * UnicodeException.
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275 */
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Robert Clipsham <robert@octarineparrot.com>
parents:
diff changeset
276 extern (C) void onUnicodeError( string msg, size_t idx )
e0b2d67cfe7c Added druntime (this should be removed once it works).
Robert Clipsham <robert@octarineparrot.com>
parents:
diff changeset
277 {
e0b2d67cfe7c Added druntime (this should be removed once it works).
Robert Clipsham <robert@octarineparrot.com>
parents:
diff changeset
278 throw new UnicodeException( msg, idx );
e0b2d67cfe7c Added druntime (this should be removed once it works).
Robert Clipsham <robert@octarineparrot.com>
parents:
diff changeset
279 }