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annotate sema/DType.d @ 119:c0b531362ca6

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Non compileing commit. Work on floating points and casts
author Anders Johnsen <skabet@gmail.com>
date Sun, 25 May 2008 19:13:07 +0200
parents 54585ad7e426
children 7d0898f77685
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1 module sema.DType;
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2
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3 import lexer.Token,
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4 ast.Exp;
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6 public
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7 import sema.Operation;
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8
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9 class DType
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10 {
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11 private char[] id;
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12 private SourceLocation loc;
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13 public DType actual;
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15 this(Identifier id, DType actual = null)
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16 {
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17 this.id = id.name;
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18 this.loc = id.startLoc();
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19 this.actual = actual is null? this : actual;
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20 }
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21
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22 this(char[] id, DType actual = null)
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23 {
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24 this.id = id;
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25 this.actual = actual is null? this : actual;
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26 }
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28 /// Is this type a DStruct
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29 bool isStruct() { return false; }
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30 /// Return a DStruct if this is one, otherwise return null
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31 DStruct asStruct() { return null; }
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33 /// Is this type a DArray
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34 bool isArray() { return false; }
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35 /// Return a DArray if this is one, otherwise return null
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36 DArray asArray() { return null; }
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38 /// Is this type a DPointer
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39 bool isPointer() { return false; }
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40 /// Return a DPointer if this is one, otherwise return null
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41 DPointer asPointer() { return null; }
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43 /// Is this type a DFunction
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44 bool isFunction() { return false; }
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45 /// Return a DFunction if this is one, otherwise return null
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46 DFunction asFunction() { return null; }
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48 /// Returns true for integers, reals and complex numbers
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49 bool isArithmetic() { return false; }
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51 /// Is this type a DInteger
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52 bool isInteger() { return false; }
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53 /// Return a DInteger if this is one, otherwise return null
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54 DInteger asInteger() { return null; }
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56 /// Is this type a DReal
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57 bool isReal() { return false; }
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58 /// Return a DReal if this is one, otherwise return null
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59 DReal asReal() { return null; }
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61 int opEquals(Object o)
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62 {
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63 if (auto t = cast(DType)o)
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64 return this.actual is t.actual;
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65 return 0;
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66 }
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68 int opCmp(Object o)
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69 {
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70 if (auto t = cast(DType)o)
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71 return cast(void*)this.actual - cast(void*)t.actual;
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72 return 0;
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73 }
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75 /**
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76 Hashing is done by casting the reference to a void* and taking that
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77 value, but this gives a bad distribution of hash-values.
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78
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79 Multiple DType's allocated close to each other will only have a
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80 difference in the lower bits of their hashes.
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81 */
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82 hash_t toHash()
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83 {
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84 return cast(hash_t)(cast(void*)this);
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85 }
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86
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87 char[] name() { return id; }
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88 SourceLocation getLoc() { return loc; }
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89 int byteSize() { return 0; }
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90
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91 /**
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92 Can this type legally be converted to that type with no casts?
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93 True for short -> int etc.
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94 */
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95 bool hasImplicitConversionTo(DType that) { return false; }
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96
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97 /**
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98 Get an Operation describing how to use the supplied operator on the two
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99 types given.
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100 */
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101 Operation getOperationWith(Operator op, DType other)
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102 {
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103 Operation res;
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104 return res;
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105 }
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106
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107 /**
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108 Get a type representing a pointer to this type (from int to int*)
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109 */
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110 DPointer getPointerTo()
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111 {
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112 if(myPointer !is null)
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113 return myPointer;
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114 myPointer = new DPointer(this);
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115 return myPointer;
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116 }
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117 private DPointer myPointer;
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118
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119 /**
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120 Mangle the DType following the specs at http://digitalmars.com/d/1.0/abi.html
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121 **/
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122 char[] mangle()
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123 {
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124 /// expects to be void
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125 return "v";
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126 }
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127
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128 /**
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129 Get a type representing a static array of this type with length 'size'
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130 */
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131 DArray getAsArray(int size)
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132 {
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133 if(size in myArray)
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134 return myArray[size];
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135 myArray[size] = new DArray(this, size);
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136 return myArray[size];
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137 }
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138 private DArray[int] myArray;
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139
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140 static DInteger
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141 Bool,
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142 Byte, UByte, Short, UShort,
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143 Int, UInt, Long, ULong,
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144 Char, WChar, DChar;
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145
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146 static DReal Float, Double, Real;
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147
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148 // Ignore - we dont support complex numbers yet
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149 static DReal CFloat, CDouble, CReal;
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150
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151 static DType Void;
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152
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153 static this()
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154 {
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155 Void = new DType("void");
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156
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157 Bool = new DInteger("bool", 1, false);
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158 Byte = new DInteger("byte", 8, false);
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159 UByte = new DInteger("ubyte", 8, true);
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160 Short = new DInteger("short", 16, false);
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161 UShort = new DInteger("ushort", 16, true);
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162 Int = new DInteger("int", 32, false);
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163 UInt = new DInteger("uint", 32, true);
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164 Long = new DInteger("long", 64, false);
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165 ULong = new DInteger("ulong", 64, true);
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166
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167 Float = new DReal("float", 32);
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168 Double = new DReal("double", 64);
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169 Real = new DReal("real", 80);
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170
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171 Char = new DInteger("char", 8, true);
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172 WChar = new DInteger("wchar", 16, true);
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173 DChar = new DInteger("dchar", 32, true);
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174 }
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175 }
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176
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177 /**
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178 Class to represent the built-in numerical types, from byte to long, reals and
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179 complex numbers.
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180
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181 Should not actually use this, but DInteger, DReal or DComplex.
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182 */
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183 class DArithmetic : DType
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184 {
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185 private static char[][DArithmetic] mangle_types;
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186
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187 static this()
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188 {
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189 mangle_types =
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190 [
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191 cast(DArithmetic)
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192 Bool : "b",
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193 Byte : "g",
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194 UByte : "h",
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195 Short : "s",
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196 UShort : "t",
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197 Int : "i",
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198 UInt : "k",
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199 Long : "l",
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200 ULong : "m",
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201
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202 Float : "f",
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203 Double : "d",
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204 Real : "e",
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205
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206 /*
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207 CFloat : "q",
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208 CDouble : "r",
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209 CReal : "c",
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210 */
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211
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212 Char : "a",
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213 WChar : "u",
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214 DChar : "w"
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215 ];
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216 }
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217
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218 this(char[] name, int bits, bool unsigned)
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219 {
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220 super(name, null);
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221 this.bits = bits;
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222 this.unsigned = unsigned;
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223 }
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224
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225 override int byteSize() { return bits / 8; }
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226
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227 bool isArithmetic() { return true; }
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228
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229 override Operation getOperationWith(Operator op, DType that)
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230 {
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231 Operation operation;
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232 if (this is that)
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233 operation = Operation.builtin(op, unsigned, isReal());
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234 return operation;
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235 }
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236
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237 override char[] mangle()
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238 {
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239 return mangle_types[this];
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240 }
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241
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242 int bits;
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243 bool unsigned;
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244 }
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245
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246 class DInteger : DArithmetic
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247 {
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248 this(char[] name, int bits, bool unsigned)
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249 {
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250 super(name, bits, unsigned);
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251 }
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252
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253 override bool hasImplicitConversionTo(DType that)
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254 {
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255 if (auto o = cast(DInteger)that)
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256 return true;
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257 return false;
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258 }
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259
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260 override bool isInteger() { return true; }
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261 override DInteger asInteger() { return this; }
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262 }
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263
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264 class DReal : DArithmetic
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265 {
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266 this(char[] name, int bits)
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267 {
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268 super(name, bits, false);
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269 }
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270
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271 override bool hasImplicitConversionTo(DType that)
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272 {
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273 if (auto o = cast(DInteger)that)
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274 return true;
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275 if (auto o = cast(DReal)that)
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276 return true;
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277 return false;
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278 }
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279
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280 override bool isReal() { return true; }
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281 override DReal asReal() { return this; }
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282 }
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283
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284 class DStruct : DType
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285 {
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286 this(Identifier id, DType actual = null)
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287 {
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288 super(id, actual);
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289 }
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290
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291 int byteSize() { return bytes_total; }
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292
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293 override bool isStruct() { return true; }
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294 override DStruct asStruct() { return this; }
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295
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296 void addMember(DType type, char[] name)
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297 {
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298 auto s = DStructMember(type, members.length);
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299 members[name] = s;
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300
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301 bytes_total += type.byteSize();
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302 }
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303
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304 int indexOf(char[] name)
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305 {
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306 if(name in members)
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307 return members[name].index;
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308
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309 return -1;
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310 }
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311
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312 DType typeOf(char[] name)
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313 {
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314 if (auto res = name in members)
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315 return res.type;
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316 return null;
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317 }
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318
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319 DStructMember[char[]] members;
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320 private int bytes_total;
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321
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322 override char[] mangle()
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323 {
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324 return "S"~Integer.toString(name.length)~name;
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325 }
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326
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327 struct DStructMember
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328 {
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329 DType type;
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330 int index;
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331 }
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332 }
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333
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334 class DArray : DType
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335 {
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336 this(DType arrayOf, int size, DType actual = null)
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337 {
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338 super(id, actual);
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339 this.arrayOf = arrayOf;
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340 this.size = size;
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341 }
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342
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343 override bool isArray() { return true; }
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344 override DArray asArray() { return this; }
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345
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346 int byteSize() { return arrayOf.byteSize * size; }
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347
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348 override char[] mangle()
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349 {
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350 return "G"~Integer.toString(size)~arrayOf.mangle;
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351 }
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352
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353 DType arrayOf;
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354 const int size;
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355 }
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356
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357 class DPointer : DType
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358 {
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359 this(DType pointerOf, DType actual = null)
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360 {
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361 super(id, actual);
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362 this.pointerOf = pointerOf;
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363 }
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364
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365 override bool isPointer() { return true; }
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366 override DPointer asPointer() { return this; }
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367
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368 int byteSize() { return DType.Int.byteSize; }
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369
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370 override char[] mangle()
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371 {
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372 return "P"~pointerOf.mangle;
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373 }
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374
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375 DType pointerOf;
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376 }
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377
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378 class DFunction : DType
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379 {
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380 this(Identifier id, DType actual = null)
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381 {
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382 super(id, actual);
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383 }
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384
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385 override bool isFunction() { return true; }
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386 override DFunction asFunction() { return this; }
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387
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388 override char[] mangle()
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389 {
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390 char[] res;
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391 res ~= "F";
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392
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393 foreach(param ; params)
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394 res ~= "J" ~ param.mangle;
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395
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396 res ~= "Z" ~ returnType.mangle;
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397
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398 return res;
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399 }
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400
26
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401 DType[] params;
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402 DType returnType;
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403 bool firstParamIsReturnValue = false;
26
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404 }
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405