Mercurial > projects > ldc
annotate dmd2/struct.c @ 984:4c0df37d0421
Removing ldc.conf. (IMPORTANT: run 'cmake .' after pull)
Added it to .hgignore.
This gets rid of spurious differences caused by CMake regenerating it differently.
Just run 'cmake .' to get it back in your local checkout.
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Thu, 19 Feb 2009 13:50:05 +0100 |
parents | 356e65836fb5 |
children | de97188378bc |
rev | line source |
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1 |
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2 // Compiler implementation of the D programming language |
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3 // Copyright (c) 1999-2008 by Digital Mars |
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4 // All Rights Reserved |
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5 // written by Walter Bright |
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6 // http://www.digitalmars.com |
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7 // License for redistribution is by either the Artistic License |
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8 // in artistic.txt, or the GNU General Public License in gnu.txt. |
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9 // See the included readme.txt for details. |
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10 |
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11 #include <stdio.h> |
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12 #include <assert.h> |
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13 |
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14 #include "root.h" |
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15 #include "aggregate.h" |
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16 #include "scope.h" |
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17 #include "mtype.h" |
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18 #include "declaration.h" |
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19 #include "module.h" |
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20 #include "id.h" |
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21 #include "statement.h" |
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22 |
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23 /********************************* AggregateDeclaration ****************************/ |
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24 |
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25 AggregateDeclaration::AggregateDeclaration(Loc loc, Identifier *id) |
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26 : ScopeDsymbol(id) |
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27 { |
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28 this->loc = loc; |
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29 |
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30 storage_class = 0; |
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31 protection = PROTpublic; |
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32 type = NULL; |
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33 handle = NULL; |
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34 structsize = 0; // size of struct |
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35 alignsize = 0; // size of struct for alignment purposes |
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36 structalign = 0; // struct member alignment in effect |
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37 hasUnions = 0; |
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38 sizeok = 0; // size not determined yet |
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39 isdeprecated = 0; |
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40 inv = NULL; |
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41 aggNew = NULL; |
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42 aggDelete = NULL; |
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43 |
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44 stag = NULL; |
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45 sinit = NULL; |
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46 scope = NULL; |
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47 dtor = NULL; |
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48 |
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49 ctor = NULL; |
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50 defaultCtor = NULL; |
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51 } |
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52 |
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53 enum PROT AggregateDeclaration::prot() |
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54 { |
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55 return protection; |
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56 } |
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57 |
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58 void AggregateDeclaration::semantic2(Scope *sc) |
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59 { |
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60 //printf("AggregateDeclaration::semantic2(%s)\n", toChars()); |
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61 if (scope) |
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62 { error("has forward references"); |
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63 return; |
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64 } |
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65 if (members) |
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66 { |
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67 sc = sc->push(this); |
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68 for (size_t i = 0; i < members->dim; i++) |
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69 { |
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70 Dsymbol *s = (Dsymbol *)members->data[i]; |
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71 s->semantic2(sc); |
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72 } |
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73 sc->pop(); |
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74 } |
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75 } |
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76 |
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77 void AggregateDeclaration::semantic3(Scope *sc) |
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78 { int i; |
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79 |
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80 //printf("AggregateDeclaration::semantic3(%s)\n", toChars()); |
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81 if (members) |
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82 { |
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83 sc = sc->push(this); |
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84 for (i = 0; i < members->dim; i++) |
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85 { |
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86 Dsymbol *s = (Dsymbol *)members->data[i]; |
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87 s->semantic3(sc); |
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88 } |
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89 sc->pop(); |
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90 } |
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91 } |
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92 |
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93 void AggregateDeclaration::inlineScan() |
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94 { int i; |
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95 |
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96 //printf("AggregateDeclaration::inlineScan(%s)\n", toChars()); |
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97 if (members) |
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98 { |
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99 for (i = 0; i < members->dim; i++) |
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100 { |
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101 Dsymbol *s = (Dsymbol *)members->data[i]; |
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102 //printf("inline scan aggregate symbol '%s'\n", s->toChars()); |
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103 s->inlineScan(); |
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104 } |
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105 } |
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106 } |
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107 |
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108 unsigned AggregateDeclaration::size(Loc loc) |
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109 { |
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110 //printf("AggregateDeclaration::size() = %d\n", structsize); |
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111 if (!members) |
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112 error(loc, "unknown size"); |
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113 if (sizeok != 1) |
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114 { error(loc, "no size yet for forward reference"); |
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115 //*(char*)0=0; |
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116 } |
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117 return structsize; |
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118 } |
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119 |
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120 Type *AggregateDeclaration::getType() |
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121 { |
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122 return type; |
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123 } |
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124 |
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125 int AggregateDeclaration::isDeprecated() |
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126 { |
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127 return isdeprecated; |
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128 } |
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129 |
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130 /**************************** |
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131 * Do byte or word alignment as necessary. |
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132 * Align sizes of 0, as we may not know array sizes yet. |
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133 */ |
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134 |
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135 void AggregateDeclaration::alignmember(unsigned salign, unsigned size, unsigned *poffset) |
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136 { |
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137 //printf("salign = %d, size = %d, offset = %d\n",salign,size,offset); |
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138 if (salign > 1) |
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139 { int sa; |
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140 |
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141 switch (size) |
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142 { case 1: |
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143 break; |
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144 case 2: |
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145 case_2: |
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146 *poffset = (*poffset + 1) & ~1; // align to word |
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147 break; |
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148 case 3: |
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149 case 4: |
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150 if (salign == 2) |
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151 goto case_2; |
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152 *poffset = (*poffset + 3) & ~3; // align to dword |
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153 break; |
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154 default: |
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155 *poffset = (*poffset + salign - 1) & ~(salign - 1); |
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156 break; |
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157 } |
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158 } |
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159 //printf("result = %d\n",offset); |
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160 } |
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161 |
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162 |
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163 void AggregateDeclaration::addField(Scope *sc, VarDeclaration *v) |
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164 { |
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165 unsigned memsize; // size of member |
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166 unsigned memalignsize; // size of member for alignment purposes |
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167 unsigned xalign; // alignment boundaries |
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168 |
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169 //printf("AggregateDeclaration::addField('%s') %s\n", v->toChars(), toChars()); |
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170 assert(!(v->storage_class & (STCstatic | STCextern | STCparameter | STCtls))); |
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171 |
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172 // Check for forward referenced types which will fail the size() call |
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173 Type *t = v->type->toBasetype(); |
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174 if (t->ty == Tstruct /*&& isStructDeclaration()*/) |
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175 { TypeStruct *ts = (TypeStruct *)t; |
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176 |
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177 if (ts->sym == this) |
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178 { |
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179 error("cannot have field %s with same struct type", v->toChars()); |
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180 } |
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181 |
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182 if (ts->sym->sizeok != 1) |
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183 { |
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184 sizeok = 2; // cannot finish; flag as forward referenced |
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185 return; |
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186 } |
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187 } |
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188 if (t->ty == Tident) |
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189 { |
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190 sizeok = 2; // cannot finish; flag as forward referenced |
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191 return; |
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192 } |
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193 |
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194 memsize = v->type->size(loc); |
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195 memalignsize = v->type->alignsize(); |
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196 xalign = v->type->memalign(sc->structalign); |
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197 alignmember(xalign, memalignsize, &sc->offset); |
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198 v->offset = sc->offset; |
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199 sc->offset += memsize; |
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200 if (sc->offset > structsize) |
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201 structsize = sc->offset; |
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202 if (sc->structalign < memalignsize) |
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203 memalignsize = sc->structalign; |
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204 if (alignsize < memalignsize) |
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205 alignsize = memalignsize; |
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206 //printf("\talignsize = %d\n", alignsize); |
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207 |
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208 v->storage_class |= STCfield; |
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209 //printf(" addField '%s' to '%s' at offset %d, size = %d\n", v->toChars(), toChars(), v->offset, memsize); |
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210 fields.push(v); |
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211 } |
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212 |
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213 |
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214 /********************************* StructDeclaration ****************************/ |
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215 |
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216 StructDeclaration::StructDeclaration(Loc loc, Identifier *id) |
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217 : AggregateDeclaration(loc, id) |
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218 { |
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219 zeroInit = 0; // assume false until we do semantic processing |
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220 hasIdentityAssign = 0; |
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221 cpctor = NULL; |
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222 postblit = NULL; |
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223 |
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224 // For forward references |
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225 type = new TypeStruct(this); |
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226 } |
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227 |
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228 Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s) |
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229 { |
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230 StructDeclaration *sd; |
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231 |
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232 if (s) |
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233 sd = (StructDeclaration *)s; |
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234 else |
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235 sd = new StructDeclaration(loc, ident); |
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236 ScopeDsymbol::syntaxCopy(sd); |
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237 return sd; |
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238 } |
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239 |
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240 void StructDeclaration::semantic(Scope *sc) |
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241 { int i; |
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242 Scope *sc2; |
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243 |
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244 //printf("+StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); |
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245 |
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246 //static int count; if (++count == 20) *(char*)0=0; |
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247 |
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248 assert(type); |
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249 if (!members) // if forward reference |
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250 return; |
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251 |
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252 if (symtab) |
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253 { if (!scope) |
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254 return; // semantic() already completed |
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255 } |
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256 else |
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257 symtab = new DsymbolTable(); |
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258 |
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259 Scope *scx = NULL; |
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260 if (scope) |
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261 { sc = scope; |
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262 scx = scope; // save so we don't make redundant copies |
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263 scope = NULL; |
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264 } |
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265 |
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266 parent = sc->parent; |
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267 #if STRUCTTHISREF |
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268 handle = type; |
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269 #else |
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270 handle = type->pointerTo(); |
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271 #endif |
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272 structalign = sc->structalign; |
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273 protection = sc->protection; |
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274 storage_class |= sc->stc; |
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275 if (sc->stc & STCdeprecated) |
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276 isdeprecated = 1; |
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277 assert(!isAnonymous()); |
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278 if (sc->stc & STCabstract) |
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279 error("structs, unions cannot be abstract"); |
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280 if (storage_class & STCinvariant) |
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281 type = type->invariantOf(); |
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282 else if (storage_class & STCconst) |
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283 type = type->constOf(); |
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284 |
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285 if (sizeok == 0) // if not already done the addMember step |
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286 { |
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287 for (i = 0; i < members->dim; i++) |
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288 { |
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289 Dsymbol *s = (Dsymbol *)members->data[i]; |
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290 //printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars()); |
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291 s->addMember(sc, this, 1); |
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292 } |
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293 } |
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294 |
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295 sizeok = 0; |
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296 sc2 = sc->push(this); |
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297 sc2->stc &= storage_class & (STCconst | STCinvariant); |
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298 sc2->parent = this; |
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299 if (isUnionDeclaration()) |
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300 sc2->inunion = 1; |
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301 sc2->protection = PROTpublic; |
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302 sc2->explicitProtection = 0; |
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303 |
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304 int members_dim = members->dim; |
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305 for (i = 0; i < members_dim; i++) |
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306 { |
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307 Dsymbol *s = (Dsymbol *)members->data[i]; |
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308 s->semantic(sc2); |
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309 if (isUnionDeclaration()) |
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310 sc2->offset = 0; |
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311 #if 0 |
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312 if (sizeok == 2) |
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313 { //printf("forward reference\n"); |
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314 break; |
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315 } |
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316 #endif |
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317 } |
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318 |
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319 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
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320 * a parameter that is a pointer to the struct. But if there |
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321 * isn't one, but is an opEquals or opCmp with a value, write |
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322 * another that is a shell around the value: |
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323 * int opCmp(struct *p) { return opCmp(*p); } |
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324 */ |
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325 |
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326 TypeFunction *tfeqptr; |
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327 { |
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328 Arguments *arguments = new Arguments; |
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329 Argument *arg = new Argument(STCin, handle, Id::p, NULL); |
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330 |
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331 arguments->push(arg); |
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332 tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd); |
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333 tfeqptr = (TypeFunction *)tfeqptr->semantic(0, sc); |
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334 } |
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335 |
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336 TypeFunction *tfeq; |
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337 { |
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338 Arguments *arguments = new Arguments; |
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339 Argument *arg = new Argument(STCin, type, NULL, NULL); |
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340 |
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341 arguments->push(arg); |
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342 tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd); |
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343 tfeq = (TypeFunction *)tfeq->semantic(0, sc); |
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344 } |
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345 |
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346 Identifier *id = Id::eq; |
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347 for (int i = 0; i < 2; i++) |
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348 { |
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349 Dsymbol *s = search_function(this, id); |
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350 FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL; |
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351 if (fdx) |
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352 { FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr); |
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353 if (!fd) |
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354 { fd = fdx->overloadExactMatch(tfeq); |
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355 if (fd) |
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356 { // Create the thunk, fdptr |
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357 FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr); |
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358 Expression *e = new IdentifierExp(loc, Id::p); |
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359 e = new PtrExp(loc, e); |
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360 Expressions *args = new Expressions(); |
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361 args->push(e); |
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362 e = new IdentifierExp(loc, id); |
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363 e = new CallExp(loc, e, args); |
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364 fdptr->fbody = new ReturnStatement(loc, e); |
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365 ScopeDsymbol *s = fdx->parent->isScopeDsymbol(); |
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366 assert(s); |
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367 s->members->push(fdptr); |
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368 fdptr->addMember(sc, s, 1); |
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369 fdptr->semantic(sc2); |
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370 } |
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371 } |
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372 } |
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373 |
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374 id = Id::cmp; |
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375 } |
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376 |
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377 dtor = buildDtor(sc2); |
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378 postblit = buildPostBlit(sc2); |
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379 cpctor = buildCpCtor(sc2); |
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380 buildOpAssign(sc2); |
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381 |
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382 sc2->pop(); |
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383 |
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384 if (sizeok == 2) |
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385 { // semantic() failed because of forward references. |
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386 // Unwind what we did, and defer it for later |
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387 fields.setDim(0); |
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388 structsize = 0; |
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389 alignsize = 0; |
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390 structalign = 0; |
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391 |
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392 scope = scx ? scx : new Scope(*sc); |
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393 scope->setNoFree(); |
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394 scope->module->addDeferredSemantic(this); |
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395 //printf("\tdeferring %s\n", toChars()); |
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396 return; |
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397 } |
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398 |
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399 // 0 sized struct's are set to 1 byte |
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400 if (structsize == 0) |
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401 { |
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402 structsize = 1; |
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403 alignsize = 1; |
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404 } |
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405 |
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406 // Round struct size up to next alignsize boundary. |
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407 // This will ensure that arrays of structs will get their internals |
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408 // aligned properly. |
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409 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); |
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410 |
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411 sizeok = 1; |
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412 Module::dprogress++; |
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413 |
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414 //printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); |
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415 |
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416 // Determine if struct is all zeros or not |
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417 zeroInit = 1; |
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418 for (i = 0; i < fields.dim; i++) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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419 { |
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420 Dsymbol *s = (Dsymbol *)fields.data[i]; |
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421 VarDeclaration *vd = s->isVarDeclaration(); |
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422 if (vd && !vd->isDataseg()) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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423 { |
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424 if (vd->init) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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425 { |
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426 // Should examine init to see if it is really all 0's |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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427 zeroInit = 0; |
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428 break; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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429 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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430 else |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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431 { |
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432 if (!vd->type->isZeroInit()) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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433 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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434 zeroInit = 0; |
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435 break; |
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436 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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437 } |
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438 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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439 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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440 |
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441 /* Look for special member functions. |
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442 */ |
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443 ctor = (CtorDeclaration *)search(0, Id::ctor, 0); |
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444 inv = (InvariantDeclaration *)search(0, Id::classInvariant, 0); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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445 aggNew = (NewDeclaration *)search(0, Id::classNew, 0); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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446 aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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447 |
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448 if (sc->func) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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449 { |
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450 semantic2(sc); |
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451 semantic3(sc); |
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452 } |
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453 } |
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454 |
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455 void StructDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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456 { int i; |
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457 |
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458 buf->printf("%s ", kind()); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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459 if (!isAnonymous()) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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460 buf->writestring(toChars()); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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461 if (!members) |
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462 { |
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463 buf->writeByte(';'); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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464 buf->writenl(); |
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465 return; |
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466 } |
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467 buf->writenl(); |
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468 buf->writeByte('{'); |
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469 buf->writenl(); |
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470 for (i = 0; i < members->dim; i++) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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471 { |
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472 Dsymbol *s = (Dsymbol *)members->data[i]; |
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|
473 |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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474 buf->writestring(" "); |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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475 s->toCBuffer(buf, hgs); |
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476 } |
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|
477 buf->writeByte('}'); |
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478 buf->writenl(); |
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|
479 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
480 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
481 |
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|
482 const char *StructDeclaration::kind() |
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483 { |
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484 return "struct"; |
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|
485 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
486 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
487 /********************************* UnionDeclaration ****************************/ |
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changeset
|
488 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
489 UnionDeclaration::UnionDeclaration(Loc loc, Identifier *id) |
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490 : StructDeclaration(loc, id) |
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changeset
|
491 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
492 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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diff
changeset
|
493 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
494 Dsymbol *UnionDeclaration::syntaxCopy(Dsymbol *s) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
495 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
496 UnionDeclaration *ud; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
497 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
498 if (s) |
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|
499 ud = (UnionDeclaration *)s; |
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|
500 else |
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|
501 ud = new UnionDeclaration(loc, ident); |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
502 StructDeclaration::syntaxCopy(ud); |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
503 return ud; |
f04dde6e882c
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|
504 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
505 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
506 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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diff
changeset
|
507 const char *UnionDeclaration::kind() |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
508 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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diff
changeset
|
509 return "union"; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
510 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
511 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
512 |