Mercurial > projects > ldc
annotate dmd2/scope.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 | f04dde6e882c |
children | 638d16625da2 |
rev | line source |
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758
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1 |
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2 // Copyright (c) 1999-2005 by Digital Mars |
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3 // All Rights Reserved |
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4 // written by Walter Bright |
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5 // http://www.digitalmars.com |
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6 // License for redistribution is by either the Artistic License |
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7 // in artistic.txt, or the GNU General Public License in gnu.txt. |
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8 // See the included readme.txt for details. |
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9 |
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10 #include <stdio.h> |
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11 #include <assert.h> |
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12 |
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13 #include "root.h" |
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14 |
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15 #include "mars.h" |
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16 #include "init.h" |
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17 #include "identifier.h" |
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18 #include "attrib.h" |
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19 #include "dsymbol.h" |
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20 #include "scope.h" |
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21 #include "declaration.h" |
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22 #include "aggregate.h" |
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23 #include "module.h" |
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24 #include "id.h" |
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25 |
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26 Scope *Scope::freelist = NULL; |
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27 |
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28 void *Scope::operator new(size_t size) |
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29 { |
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30 if (freelist) |
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31 { |
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32 Scope *s = freelist; |
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33 freelist = s->enclosing; |
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34 //printf("freelist %p\n", s); |
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35 assert(s->flags & SCOPEfree); |
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36 s->flags &= ~SCOPEfree; |
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37 return s; |
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38 } |
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39 |
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40 void *p = ::operator new(size); |
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41 //printf("new %p\n", p); |
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42 return p; |
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43 } |
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44 |
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45 Scope::Scope() |
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46 { // Create root scope |
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47 |
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48 //printf("Scope::Scope() %p\n", this); |
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49 this->module = NULL; |
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50 this->scopesym = NULL; |
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51 this->sd = NULL; |
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52 this->enclosing = NULL; |
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53 this->parent = NULL; |
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54 this->sw = NULL; |
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55 this->tf = NULL; |
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56 this->tfOfTry = NULL; |
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57 this->tinst = NULL; |
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58 this->sbreak = NULL; |
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59 this->scontinue = NULL; |
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60 this->fes = NULL; |
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61 this->structalign = global.structalign; |
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62 this->func = NULL; |
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63 this->slabel = NULL; |
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64 this->linkage = LINKd; |
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65 this->protection = PROTpublic; |
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66 this->explicitProtection = 0; |
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67 this->stc = 0; |
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68 this->offset = 0; |
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69 this->inunion = 0; |
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70 this->incontract = 0; |
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71 this->nofree = 0; |
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72 this->noctor = 0; |
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73 this->noaccesscheck = 0; |
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74 this->intypeof = 0; |
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75 this->parameterSpecialization = 0; |
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76 this->callSuper = 0; |
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77 this->flags = 0; |
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78 this->anonAgg = NULL; |
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79 this->lastdc = NULL; |
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80 this->lastoffset = 0; |
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81 this->docbuf = NULL; |
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82 } |
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83 |
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84 Scope::Scope(Scope *enclosing) |
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85 { |
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86 //printf("Scope::Scope(enclosing = %p) %p\n", enclosing, this); |
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87 assert(!(enclosing->flags & SCOPEfree)); |
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88 this->module = enclosing->module; |
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89 this->func = enclosing->func; |
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90 this->parent = enclosing->parent; |
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91 this->scopesym = NULL; |
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92 this->sd = NULL; |
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93 this->sw = enclosing->sw; |
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94 this->tf = enclosing->tf; |
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95 this->tfOfTry = enclosing->tfOfTry; |
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96 this->tinst = enclosing->tinst; |
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97 this->sbreak = enclosing->sbreak; |
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98 this->scontinue = enclosing->scontinue; |
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99 this->fes = enclosing->fes; |
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100 this->structalign = enclosing->structalign; |
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101 this->enclosing = enclosing; |
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102 #ifdef DEBUG |
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103 if (enclosing->enclosing) |
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104 assert(!(enclosing->enclosing->flags & SCOPEfree)); |
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105 if (this == enclosing->enclosing) |
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106 { |
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107 printf("this = %p, enclosing = %p, enclosing->enclosing = %p\n", this, enclosing, enclosing->enclosing); |
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108 } |
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109 assert(this != enclosing->enclosing); |
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110 #endif |
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111 this->slabel = NULL; |
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112 this->linkage = enclosing->linkage; |
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113 this->protection = enclosing->protection; |
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114 this->explicitProtection = enclosing->explicitProtection; |
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115 this->stc = enclosing->stc; |
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116 this->offset = 0; |
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117 this->inunion = enclosing->inunion; |
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118 this->incontract = enclosing->incontract; |
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119 this->nofree = 0; |
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120 this->noctor = enclosing->noctor; |
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121 this->noaccesscheck = enclosing->noaccesscheck; |
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122 this->intypeof = enclosing->intypeof; |
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123 this->parameterSpecialization = enclosing->parameterSpecialization; |
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124 this->callSuper = enclosing->callSuper; |
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125 this->flags = 0; |
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126 this->anonAgg = NULL; |
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127 this->lastdc = NULL; |
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128 this->lastoffset = 0; |
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129 this->docbuf = enclosing->docbuf; |
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130 assert(this != enclosing); |
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131 } |
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132 |
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133 Scope *Scope::createGlobal(Module *module) |
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134 { |
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135 Scope *sc; |
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136 |
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137 sc = new Scope(); |
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138 sc->module = module; |
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139 sc->scopesym = new ScopeDsymbol(); |
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140 sc->scopesym->symtab = new DsymbolTable(); |
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141 |
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142 // Add top level package as member of this global scope |
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143 Dsymbol *m = module; |
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144 while (m->parent) |
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145 m = m->parent; |
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146 m->addMember(NULL, sc->scopesym, 1); |
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147 m->parent = NULL; // got changed by addMember() |
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148 |
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149 // Create the module scope underneath the global scope |
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150 sc = sc->push(module); |
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151 sc->parent = module; |
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152 return sc; |
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153 } |
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154 |
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155 Scope *Scope::push() |
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156 { |
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157 //printf("Scope::push()\n"); |
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158 Scope *s = new Scope(this); |
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159 assert(this != s); |
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160 return s; |
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161 } |
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162 |
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163 Scope *Scope::push(ScopeDsymbol *ss) |
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164 { |
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165 //printf("Scope::push(%s)\n", ss->toChars()); |
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166 Scope *s = push(); |
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167 s->scopesym = ss; |
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168 return s; |
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169 } |
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170 |
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171 Scope *Scope::pop() |
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172 { |
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173 //printf("Scope::pop() %p nofree = %d\n", this, nofree); |
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174 Scope *enc = enclosing; |
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175 |
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176 if (enclosing) |
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177 enclosing->callSuper |= callSuper; |
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178 |
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179 if (!nofree) |
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180 { enclosing = freelist; |
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181 freelist = this; |
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182 flags |= SCOPEfree; |
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183 } |
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184 |
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185 return enc; |
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186 } |
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187 |
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188 void Scope::mergeCallSuper(Loc loc, unsigned cs) |
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189 { |
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190 // This does a primitive flow analysis to support the restrictions |
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191 // regarding when and how constructors can appear. |
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192 // It merges the results of two paths. |
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193 // The two paths are callSuper and cs; the result is merged into callSuper. |
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194 |
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195 if (cs != callSuper) |
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196 { int a; |
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197 int b; |
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198 |
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199 callSuper |= cs & (CSXany_ctor | CSXlabel); |
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200 if (cs & CSXreturn) |
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201 { |
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202 } |
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203 else if (callSuper & CSXreturn) |
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204 { |
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205 callSuper = cs | (callSuper & (CSXany_ctor | CSXlabel)); |
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206 } |
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207 else |
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208 { |
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209 a = (cs & (CSXthis_ctor | CSXsuper_ctor)) != 0; |
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210 b = (callSuper & (CSXthis_ctor | CSXsuper_ctor)) != 0; |
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211 if (a != b) |
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212 error(loc, "one path skips constructor"); |
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213 callSuper |= cs; |
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214 } |
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215 } |
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216 } |
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217 |
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218 Dsymbol *Scope::search(Loc loc, Identifier *ident, Dsymbol **pscopesym) |
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219 { Dsymbol *s; |
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220 Scope *sc; |
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221 |
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222 //printf("Scope::search(%p, '%s')\n", this, ident->toChars()); |
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223 if (ident == Id::empty) |
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224 { |
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225 // Look for module scope |
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226 for (sc = this; sc; sc = sc->enclosing) |
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227 { |
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228 assert(sc != sc->enclosing); |
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229 if (sc->scopesym) |
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230 { |
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231 s = sc->scopesym->isModule(); |
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232 if (s) |
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233 { |
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234 //printf("\tfound %s.%s\n", s->parent ? s->parent->toChars() : "", s->toChars()); |
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235 if (pscopesym) |
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236 *pscopesym = sc->scopesym; |
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237 return s; |
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238 } |
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239 } |
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240 } |
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241 return NULL; |
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242 } |
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243 |
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244 for (sc = this; sc; sc = sc->enclosing) |
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245 { |
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246 assert(sc != sc->enclosing); |
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247 if (sc->scopesym) |
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248 { |
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249 //printf("\tlooking in scopesym '%s', kind = '%s'\n", sc->scopesym->toChars(), sc->scopesym->kind()); |
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250 s = sc->scopesym->search(loc, ident, 0); |
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251 if (s) |
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252 { |
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253 if ((global.params.warnings || |
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254 global.params.Dversion > 1) && |
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255 ident == Id::length && |
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256 sc->scopesym->isArrayScopeSymbol() && |
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257 sc->enclosing && |
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258 sc->enclosing->search(loc, ident, NULL)) |
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259 { |
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260 // WTF ? |
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261 if (global.params.warnings) |
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262 fprintf(stdmsg, "warning - "); |
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263 error(s->loc, "array 'length' hides other 'length' name in outer scope"); |
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264 } |
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265 |
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266 //printf("\tfound %s.%s, kind = '%s'\n", s->parent ? s->parent->toChars() : "", s->toChars(), s->kind()); |
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267 if (pscopesym) |
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268 *pscopesym = sc->scopesym; |
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269 return s; |
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270 } |
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271 } |
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272 } |
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273 |
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274 return NULL; |
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275 } |
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276 |
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277 Dsymbol *Scope::insert(Dsymbol *s) |
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278 { Scope *sc; |
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279 |
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280 for (sc = this; sc; sc = sc->enclosing) |
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281 { |
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282 //printf("\tsc = %p\n", sc); |
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283 if (sc->scopesym) |
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284 { |
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285 //printf("\t\tsc->scopesym = %p\n", sc->scopesym); |
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286 if (!sc->scopesym->symtab) |
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287 sc->scopesym->symtab = new DsymbolTable(); |
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288 return sc->scopesym->symtab->insert(s); |
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289 } |
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290 } |
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291 assert(0); |
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292 return NULL; |
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293 } |
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294 |
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295 /******************************************** |
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296 * Search enclosing scopes for ClassDeclaration. |
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297 */ |
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298 |
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299 ClassDeclaration *Scope::getClassScope() |
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300 { Scope *sc; |
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301 |
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302 for (sc = this; sc; sc = sc->enclosing) |
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303 { |
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304 ClassDeclaration *cd; |
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305 |
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306 if (sc->scopesym) |
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307 { |
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308 cd = sc->scopesym->isClassDeclaration(); |
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309 if (cd) |
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310 return cd; |
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311 } |
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312 } |
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313 return NULL; |
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314 } |
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315 |
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316 /******************************************** |
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317 * Search enclosing scopes for ClassDeclaration. |
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318 */ |
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319 |
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320 AggregateDeclaration *Scope::getStructClassScope() |
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321 { Scope *sc; |
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322 |
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323 for (sc = this; sc; sc = sc->enclosing) |
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324 { |
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325 AggregateDeclaration *ad; |
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326 |
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327 if (sc->scopesym) |
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328 { |
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329 ad = sc->scopesym->isClassDeclaration(); |
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330 if (ad) |
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331 return ad; |
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332 else |
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333 { ad = sc->scopesym->isStructDeclaration(); |
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334 if (ad) |
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335 return ad; |
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336 } |
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337 } |
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338 } |
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339 return NULL; |
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340 } |
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341 |
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342 /******************************************* |
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343 * For TemplateDeclarations, we need to remember the Scope |
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344 * where it was declared. So mark the Scope as not |
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345 * to be free'd. |
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346 */ |
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347 |
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348 void Scope::setNoFree() |
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349 { Scope *sc; |
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350 //int i = 0; |
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351 |
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352 //printf("Scope::setNoFree(this = %p)\n", this); |
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353 for (sc = this; sc; sc = sc->enclosing) |
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354 { |
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355 //printf("\tsc = %p\n", sc); |
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356 sc->nofree = 1; |
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357 |
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358 assert(!(flags & SCOPEfree)); |
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359 //assert(sc != sc->enclosing); |
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360 //assert(!sc->enclosing || sc != sc->enclosing->enclosing); |
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361 //if (++i == 10) |
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362 //assert(0); |
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363 } |
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364 } |