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annotate dmd/import.c @ 883:b52d5de7783f

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author Christian Kamm <kamm incasoftware de>
date Thu, 08 Jan 2009 18:20:02 +0100
parents 330f999ade44
children 78038e540342
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
846
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1
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2 // Compiler implementation of the D programming language
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3 // Copyright (c) 1999-2006 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 "dsymbol.h"
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16 #include "import.h"
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17 #include "identifier.h"
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18 #include "module.h"
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19 #include "scope.h"
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20 #include "hdrgen.h"
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21 #include "mtype.h"
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22 #include "declaration.h"
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23 #include "id.h"
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24
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25 /********************************* Import ****************************/
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26
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27 Import::Import(Loc loc, Array *packages, Identifier *id, Identifier *aliasId,
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28 int isstatic)
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29 : Dsymbol(id)
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30 {
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31 this->loc = loc;
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32 this->packages = packages;
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33 this->id = id;
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34 this->aliasId = aliasId;
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35 this->isstatic = isstatic;
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36 protection = PROTundefined;
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37 pkg = NULL;
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38 mod = NULL;
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39
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40 if (aliasId)
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41 this->ident = aliasId;
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42 // Kludge to change Import identifier to first package
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43 else if (packages && packages->dim)
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44 this->ident = (Identifier *)packages->data[0];
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45 }
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46
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47 void Import::addAlias(Identifier *name, Identifier *alias)
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48 {
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49 if (isstatic)
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50 error("cannot have an import bind list");
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51
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52 if (!aliasId)
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53 this->ident = NULL; // make it an anonymous import
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54
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55 names.push(name);
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56 aliases.push(alias);
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57 }
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58
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59 const char *Import::kind()
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60 {
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61 return isstatic ? (char *)"static import" : (char *)"import";
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62 }
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63
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64 enum PROT Import::prot()
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65 {
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66 return protection;
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67 }
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68
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69 Dsymbol *Import::syntaxCopy(Dsymbol *s)
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70 {
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71 assert(!s);
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72
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73 Import *si;
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74
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75 si = new Import(loc, packages, id, aliasId, isstatic);
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76
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77 for (size_t i = 0; i < names.dim; i++)
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78 {
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79 si->addAlias((Identifier *)names.data[i], (Identifier *)aliases.data[i]);
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80 }
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81
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82 return si;
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83 }
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84
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85 void Import::load(Scope *sc)
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86 {
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87 DsymbolTable *dst;
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88 Dsymbol *s;
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89
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90 //printf("Import::load('%s')\n", toChars());
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91
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92 // See if existing module
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93 dst = Package::resolve(packages, NULL, &pkg);
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94
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95 s = dst->lookup(id);
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96 if (s)
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97 {
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98 if (s->isModule())
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99 mod = (Module *)s;
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100 else
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101 error("package and module have the same name");
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102 }
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103
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104 if (!mod)
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105 {
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106 // Load module
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107 mod = Module::load(loc, packages, id);
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108 dst->insert(id, mod); // id may be different from mod->ident,
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109 // if so then insert alias
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110 if (!mod->importedFrom)
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111 mod->importedFrom = sc ? sc->module->importedFrom : Module::rootModule;
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112 }
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113 if (!pkg)
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114 pkg = mod;
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115
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116 //printf("-Import::load('%s'), pkg = %p\n", toChars(), pkg);
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117 }
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118
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119
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120 void Import::semantic(Scope *sc)
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121 {
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122 //printf("Import::semantic('%s')\n", toChars());
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123
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124 load(sc);
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125
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126 if (mod)
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127 {
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128 #if 0
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129 if (mod->loc.linnum != 0)
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130 { /* If the line number is not 0, then this is not
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131 * a 'root' module, i.e. it was not specified on the command line.
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132 */
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133 mod->importedFrom = sc->module->importedFrom;
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134 assert(mod->importedFrom);
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135 }
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136 #endif
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137
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138 // Modules need a list of each imported module
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139 //printf("%s imports %s\n", sc->module->toChars(), mod->toChars());
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140 sc->module->aimports.push(mod);
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141
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142 mod->semantic();
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143
846
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144 /* Default to private importing
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145 */
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146 protection = sc->protection;
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147 if (!sc->explicitProtection)
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148 protection = PROTprivate;
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149
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150 if (!isstatic && !aliasId && !names.dim)
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151 {
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152 sc->scopesym->importScope(mod, protection);
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153 }
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154
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155 if (mod->needmoduleinfo)
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156 sc->module->needmoduleinfo = 1;
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157
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158 sc = sc->push(mod);
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159 for (size_t i = 0; i < aliasdecls.dim; i++)
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160 { AliasDeclaration *ad = (AliasDeclaration *)aliasdecls.data[i];
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161
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162 //printf("\tImport alias semantic('%s')\n", s->toChars());
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163 if (!mod->search(loc, (Identifier *)names.data[i], 0))
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164 error("%s not found", ((Identifier *)names.data[i])->toChars());
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165
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166 ad->semantic(sc);
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167 ad->protection = protection;
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168 }
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169 sc = sc->pop();
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170 }
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171 //printf("-Import::semantic('%s'), pkg = %p\n", toChars(), pkg);
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172 }
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173
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174 void Import::semantic2(Scope *sc)
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175 {
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176 //printf("Import::semantic2('%s')\n", toChars());
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177 mod->semantic2();
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178 if (mod->needmoduleinfo)
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179 sc->module->needmoduleinfo = 1;
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180 }
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181
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182 Dsymbol *Import::toAlias()
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183 {
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184 if (aliasId)
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185 return mod;
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186 return this;
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187 }
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188
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189 /*****************************
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190 * Add import to sd's symbol table.
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191 */
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192
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193 int Import::addMember(Scope *sc, ScopeDsymbol *sd, int memnum)
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194 {
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195 int result = 0;
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196
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197 if (names.dim == 0)
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198 return Dsymbol::addMember(sc, sd, memnum);
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199
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200 if (aliasId)
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201 result = Dsymbol::addMember(sc, sd, memnum);
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202
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203 /* Instead of adding the import to sd's symbol table,
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204 * add each of the alias=name pairs
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205 */
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206 for (size_t i = 0; i < names.dim; i++)
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207 {
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208 Identifier *name = (Identifier *)names.data[i];
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209 Identifier *alias = (Identifier *)aliases.data[i];
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210
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211 if (!alias)
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212 alias = name;
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213
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214 TypeIdentifier *tname = new TypeIdentifier(loc, name);
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215 AliasDeclaration *ad = new AliasDeclaration(loc, alias, tname);
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216 result |= ad->addMember(sc, sd, memnum);
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217
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218 aliasdecls.push(ad);
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219 }
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220
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221 return result;
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222 }
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223
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224 Dsymbol *Import::search(Loc loc, Identifier *ident, int flags)
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225 {
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226 //printf("%s.Import::search(ident = '%s', flags = x%x)\n", toChars(), ident->toChars(), flags);
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227
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228 if (!pkg)
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229 { load(NULL);
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230 mod->semantic();
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231 }
846
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232
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233 // Forward it to the package/module
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234 return pkg->search(loc, ident, flags);
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235 }
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236
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237 int Import::overloadInsert(Dsymbol *s)
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238 {
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239 // Allow multiple imports of the same name
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240 return s->isImport() != NULL;
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241 }
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242
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243 void Import::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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244 {
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245 if (hgs->hdrgen && id == Id::object)
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246 return; // object is imported by default
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247
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248 if (isstatic)
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249 buf->writestring("static ");
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250 buf->writestring("import ");
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251 if (aliasId)
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252 {
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253 buf->printf("%s = ", aliasId->toChars());
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254 }
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255 if (packages && packages->dim)
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256 {
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257 for (size_t i = 0; i < packages->dim; i++)
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258 { Identifier *pid = (Identifier *)packages->data[i];
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259
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260 buf->printf("%s.", pid->toChars());
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261 }
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262 }
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263 buf->printf("%s;", id->toChars());
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264 buf->writenl();
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265 }
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diff changeset
266