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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 pkg = NULL;
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37 mod = NULL;
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38
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39 if (aliasId)
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40 this->ident = aliasId;
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41 // Kludge to change Import identifier to first package
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42 else if (packages && packages->dim)
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43 this->ident = (Identifier *)packages->data[0];
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44 }
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45
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46 void Import::addAlias(Identifier *name, Identifier *alias)
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47 {
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48 if (isstatic)
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49 error("cannot have an import bind list");
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50
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51 if (!aliasId)
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52 this->ident = NULL; // make it an anonymous import
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53
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54 names.push(name);
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55 aliases.push(alias);
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56 }
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57
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58 char *Import::kind()
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59 {
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60 return isstatic ? (char *)"static import" : (char *)"import";
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61 }
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62
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63
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64 Dsymbol *Import::syntaxCopy(Dsymbol *s)
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65 {
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66 assert(!s);
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67
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68 Import *si;
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69
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70 si = new Import(loc, packages, id, aliasId, isstatic);
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71
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72 for (size_t i = 0; i < names.dim; i++)
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73 {
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74 si->addAlias((Identifier *)names.data[i], (Identifier *)aliases.data[i]);
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75 }
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76
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77 return si;
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78 }
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79
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80 void Import::load(Scope *sc)
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81 {
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82 DsymbolTable *dst;
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83 Dsymbol *s;
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84
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85 //printf("Import::load('%s')\n", toChars());
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86
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87 // See if existing module
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88 dst = Package::resolve(packages, NULL, &pkg);
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89
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90 s = dst->lookup(id);
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91 if (s)
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92 {
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93 if (s->isModule())
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94 mod = (Module *)s;
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95 else
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96 error("package and module have the same name");
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97 }
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98
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99 if (!mod)
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100 {
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101 // Load module
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102 mod = Module::load(loc, packages, id);
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103 dst->insert(id, mod); // id may be different from mod->ident,
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104 // if so then insert alias
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105 if (!mod->importedFrom)
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106 mod->importedFrom = sc ? sc->module->importedFrom : Module::rootModule;
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107 }
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108 if (!pkg)
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109 pkg = mod;
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110 mod->semantic();
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111
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112 //printf("-Import::load('%s'), pkg = %p\n", toChars(), pkg);
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113 }
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114
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115
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116 void Import::semantic(Scope *sc)
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117 {
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118 //printf("Import::semantic('%s')\n", toChars());
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119
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120 load(sc);
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121
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122 if (mod)
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123 {
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124 #if 0
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125 if (mod->loc.linnum != 0)
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126 { /* If the line number is not 0, then this is not
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127 * a 'root' module, i.e. it was not specified on the command line.
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128 */
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129 mod->importedFrom = sc->module->importedFrom;
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130 assert(mod->importedFrom);
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131 }
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132 #endif
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133
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134 if (!isstatic && !aliasId && !names.dim)
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135 {
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136 /* Default to private importing
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137 */
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138 enum PROT prot = sc->protection;
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139 if (!sc->explicitProtection)
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140 prot = PROTprivate;
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141 sc->scopesym->importScope(mod, prot);
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142 }
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143
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144 // Modules need a list of each imported module
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145 sc->module->aimports.push(mod);
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146
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147 if (mod->needmoduleinfo)
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148 sc->module->needmoduleinfo = 1;
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149
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150 sc = sc->push(mod);
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151 for (size_t i = 0; i < aliasdecls.dim; i++)
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152 { Dsymbol *s = (Dsymbol *)aliasdecls.data[i];
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153
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154 //printf("\tImport alias semantic('%s')\n", s->toChars());
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155 if (!mod->search(loc, (Identifier *)names.data[i], 0))
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156 error("%s not found", ((Identifier *)names.data[i])->toChars());
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157
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158 s->semantic(sc);
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159 }
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160 sc = sc->pop();
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161 }
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162 //printf("-Import::semantic('%s'), pkg = %p\n", toChars(), pkg);
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163 }
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164
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165 void Import::semantic2(Scope *sc)
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166 {
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167 //printf("Import::semantic2('%s')\n", toChars());
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168 mod->semantic2();
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169 if (mod->needmoduleinfo)
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170 sc->module->needmoduleinfo = 1;
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171 }
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172
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173 Dsymbol *Import::toAlias()
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174 {
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175 if (aliasId)
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176 return mod;
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177 return this;
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178 }
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179
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180 int Import::addMember(Scope *sc, ScopeDsymbol *sd, int memnum)
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181 {
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182 int result = 0;
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183
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184 if (names.dim == 0)
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185 return Dsymbol::addMember(sc, sd, memnum);
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186
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187 if (aliasId)
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188 result = Dsymbol::addMember(sc, sd, memnum);
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189
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190 for (size_t i = 0; i < names.dim; i++)
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191 {
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192 Identifier *name = (Identifier *)names.data[i];
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193 Identifier *alias = (Identifier *)aliases.data[i];
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194
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195 if (!alias)
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196 alias = name;
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197
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198 #if 1
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199 TypeIdentifier *tname = new TypeIdentifier(loc, name);
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200 #else
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201 TypeIdentifier *tname = new TypeIdentifier(loc, NULL);
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202 if (packages)
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203 {
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204 for (size_t j = 0; j < packages->dim; j++)
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205 { Identifier *pid = (Identifier *)packages->data[j];
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206
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207 if (!tname->ident)
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208 tname->ident = pid;
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209 else
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210 tname->addIdent(pid);
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211 }
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212 }
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213 if (!tname->ident)
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214 tname->ident = id;
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215 else
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216 tname->addIdent(id);
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217 tname->addIdent(name);
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218 #endif
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219 AliasDeclaration *ad = new AliasDeclaration(loc, alias, tname);
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220 result |= ad->addMember(sc, sd, memnum);
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221
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222 aliasdecls.push(ad);
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223 }
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224
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225 return result;
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226 }
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227
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228 Dsymbol *Import::search(Loc loc, Identifier *ident, int flags)
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229 {
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230 //printf("%s.Import::search(ident = '%s', flags = x%x)\n", toChars(), ident->toChars(), flags);
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231
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232 if (!pkg)
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233 load(NULL);
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234
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235 // Forward it to the package/module
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236 return pkg->search(loc, ident, flags);
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237 }
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238
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239 int Import::overloadInsert(Dsymbol *s)
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240 {
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241 // Allow multiple imports of the same name
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242 return s->isImport() != NULL;
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243 }
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244
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245 void Import::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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246 {
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247 if (hgs->hdrgen && id == Id::object)
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248 return; // object is imported by default
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249
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250 if (isstatic)
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251 buf->writestring("static ");
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252 buf->writestring("import ");
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253 if (aliasId)
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254 {
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255 buf->printf("%s = ", aliasId->toChars());
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256 }
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257 if (packages && packages->dim)
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258 {
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259 for (size_t i = 0; i < packages->dim; i++)
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260 { Identifier *pid = (Identifier *)packages->data[i];
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261
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262 buf->printf("%s.", pid->toChars());
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263 }
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264 }
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265 buf->printf("%s;", id->toChars());
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266 buf->writenl();
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267 }
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268
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