Mercurial > projects > ldc
annotate dmd2/clone.c @ 837:331a176c1f4f
Removed error on naked, not fully complete, but I'll be doing more work on it during this Christmas, and some things do work.
Fixed taking delegate of final class method. see mini/delegate3.d.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 09 Dec 2008 14:07:30 +0100 |
parents | f04dde6e882c |
children | 356e65836fb5 |
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 "expression.h" |
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22 #include "statement.h" |
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23 #include "init.h" |
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24 |
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25 |
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26 /******************************************* |
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27 * We need an opAssign for the struct if |
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28 * it has a destructor or a postblit. |
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29 * We need to generate one if a user-specified one does not exist. |
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30 */ |
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31 |
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32 int StructDeclaration::needOpAssign() |
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33 { |
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34 #define X 0 |
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35 if (X) printf("StructDeclaration::needOpAssign() %s\n", toChars()); |
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36 if (hasIdentityAssign) |
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37 goto Ldontneed; |
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38 |
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39 if (dtor || postblit) |
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40 goto Lneed; |
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41 |
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42 /* If any of the fields need an opAssign, then we |
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43 * need it too. |
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44 */ |
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45 for (size_t i = 0; i < fields.dim; i++) |
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46 { |
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47 Dsymbol *s = (Dsymbol *)fields.data[i]; |
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48 VarDeclaration *v = s->isVarDeclaration(); |
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49 assert(v && v->storage_class & STCfield); |
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50 Type *tv = v->type->toBasetype(); |
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51 while (tv->ty == Tsarray) |
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52 { TypeSArray *ta = (TypeSArray *)tv; |
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53 tv = tv->nextOf()->toBasetype(); |
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54 } |
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55 if (tv->ty == Tstruct) |
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56 { TypeStruct *ts = (TypeStruct *)tv; |
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57 StructDeclaration *sd = ts->sym; |
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58 if (sd->needOpAssign()) |
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59 goto Lneed; |
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60 } |
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61 } |
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62 Ldontneed: |
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63 if (X) printf("\tdontneed\n"); |
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64 return 0; |
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65 |
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66 Lneed: |
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67 if (X) printf("\tneed\n"); |
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68 return 1; |
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69 #undef X |
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70 } |
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71 |
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72 /****************************************** |
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73 * Build opAssign for struct. |
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74 * S* opAssign(S s) { ... } |
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75 */ |
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76 |
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77 FuncDeclaration *StructDeclaration::buildOpAssign(Scope *sc) |
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78 { |
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79 if (!needOpAssign()) |
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80 return NULL; |
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81 |
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82 //printf("StructDeclaration::buildOpAssign() %s\n", toChars()); |
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83 |
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84 FuncDeclaration *fop = NULL; |
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85 |
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86 Argument *param = new Argument(STCnodtor, type, Id::p, NULL); |
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87 Arguments *fparams = new Arguments; |
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88 fparams->push(param); |
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89 Type *ftype = new TypeFunction(fparams, handle, FALSE, LINKd); |
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90 |
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91 fop = new FuncDeclaration(0, 0, Id::assign, STCundefined, ftype); |
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92 |
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93 Expression *e = NULL; |
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94 if (postblit) |
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95 { /* Swap: |
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96 * tmp = *this; *this = s; tmp.dtor(); |
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97 */ |
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98 //printf("\tswap copy\n"); |
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99 Identifier *idtmp = Lexer::uniqueId("__tmp"); |
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100 VarDeclaration *tmp; |
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101 AssignExp *ec = NULL; |
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102 if (dtor) |
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103 { |
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104 tmp = new VarDeclaration(0, type, idtmp, new VoidInitializer(0)); |
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105 tmp->noauto = 1; |
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106 e = new DeclarationExp(0, tmp); |
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107 ec = new AssignExp(0, |
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108 new VarExp(0, tmp), |
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109 new PtrExp(0, new ThisExp(0))); |
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110 ec->op = TOKblit; |
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111 e = Expression::combine(e, ec); |
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112 } |
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113 ec = new AssignExp(0, |
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114 new PtrExp(0, new ThisExp(0)), |
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115 new IdentifierExp(0, Id::p)); |
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116 ec->op = TOKblit; |
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117 e = Expression::combine(e, ec); |
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118 if (dtor) |
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119 { |
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120 /* Instead of running the destructor on s, run it |
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121 * on tmp. This avoids needing to copy tmp back in to s. |
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122 */ |
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123 Expression *ec = new DotVarExp(0, new VarExp(0, tmp), dtor, 0); |
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124 ec = new CallExp(0, ec); |
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125 e = Expression::combine(e, ec); |
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126 } |
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127 } |
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128 else |
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129 { /* Do memberwise copy |
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130 */ |
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131 //printf("\tmemberwise copy\n"); |
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132 for (size_t i = 0; i < fields.dim; i++) |
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133 { |
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134 Dsymbol *s = (Dsymbol *)fields.data[i]; |
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135 VarDeclaration *v = s->isVarDeclaration(); |
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136 assert(v && v->storage_class & STCfield); |
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137 // this.v = s.v; |
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138 AssignExp *ec = new AssignExp(0, |
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139 new DotVarExp(0, new ThisExp(0), v, 0), |
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140 new DotVarExp(0, new IdentifierExp(0, Id::p), v, 0)); |
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141 ec->op = TOKblit; |
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142 e = Expression::combine(e, ec); |
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143 } |
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144 } |
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145 Statement *s1 = new ExpStatement(0, e); |
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146 |
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147 /* Add: |
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148 * return this; |
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149 */ |
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150 e = new ThisExp(0); |
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151 Statement *s2 = new ReturnStatement(0, e); |
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152 |
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153 fop->fbody = new CompoundStatement(0, s1, s2); |
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154 |
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155 members->push(fop); |
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156 fop->addMember(sc, this, 1); |
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157 |
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158 sc = sc->push(); |
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159 sc->stc = 0; |
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160 sc->linkage = LINKd; |
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161 |
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162 fop->semantic(sc); |
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163 |
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164 sc->pop(); |
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165 |
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166 //printf("-StructDeclaration::buildOpAssign() %s\n", toChars()); |
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167 |
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168 return fop; |
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169 } |
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170 |
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171 /******************************************* |
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172 * Build copy constructor for struct. |
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173 * Copy constructors are compiler generated only, and are only |
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174 * callable from the compiler. They are not user accessible. |
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175 * A copy constructor is: |
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176 * void cpctpr(ref S s) |
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177 * { |
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178 * *this = s; |
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179 * this.postBlit(); |
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180 * } |
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181 * This is done so: |
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182 * - postBlit() never sees uninitialized data |
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183 * - memcpy can be much more efficient than memberwise copy |
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184 * - no fields are overlooked |
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185 */ |
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186 |
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187 FuncDeclaration *StructDeclaration::buildCpCtor(Scope *sc) |
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188 { |
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189 //printf("StructDeclaration::buildCpCtor() %s\n", toChars()); |
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190 FuncDeclaration *fcp = NULL; |
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191 |
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192 /* Copy constructor is only necessary if there is a postblit function, |
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193 * otherwise the code generator will just do a bit copy. |
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194 */ |
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195 if (postblit) |
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196 { |
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197 //printf("generating cpctor\n"); |
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198 |
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199 Argument *param = new Argument(STCref, type, Id::p, NULL); |
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200 Arguments *fparams = new Arguments; |
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201 fparams->push(param); |
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202 Type *ftype = new TypeFunction(fparams, Type::tvoid, FALSE, LINKd); |
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203 |
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204 fcp = new FuncDeclaration(0, 0, Id::cpctor, STCundefined, ftype); |
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205 |
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206 // Build *this = p; |
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207 Expression *e = new ThisExp(0); |
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208 e = new PtrExp(0, e); |
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209 AssignExp *ea = new AssignExp(0, e, new IdentifierExp(0, Id::p)); |
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210 ea->op = TOKblit; |
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211 Statement *s = new ExpStatement(0, ea); |
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212 |
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213 // Build postBlit(); |
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214 e = new VarExp(0, postblit, 0); |
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215 e = new CallExp(0, e); |
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216 |
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217 s = new CompoundStatement(0, s, new ExpStatement(0, e)); |
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218 fcp->fbody = s; |
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219 |
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220 members->push(fcp); |
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221 |
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222 sc = sc->push(); |
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223 sc->stc = 0; |
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224 sc->linkage = LINKd; |
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225 |
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226 fcp->semantic(sc); |
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227 |
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228 sc->pop(); |
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229 } |
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230 |
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231 return fcp; |
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232 } |
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233 |
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234 /***************************************** |
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235 * Create inclusive postblit for struct by aggregating |
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236 * all the postblits in postblits[] with the postblits for |
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237 * all the members. |
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238 * Note the close similarity with AggregateDeclaration::buildDtor(), |
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239 * and the ordering changes (runs forward instead of backwards). |
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240 */ |
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241 |
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242 #if DMDV2 |
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243 FuncDeclaration *StructDeclaration::buildPostBlit(Scope *sc) |
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244 { |
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245 //printf("StructDeclaration::buildPostBlit() %s\n", toChars()); |
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246 Expression *e = NULL; |
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247 |
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248 for (size_t i = 0; i < fields.dim; i++) |
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249 { |
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250 Dsymbol *s = (Dsymbol *)fields.data[i]; |
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251 VarDeclaration *v = s->isVarDeclaration(); |
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252 assert(v && v->storage_class & STCfield); |
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253 Type *tv = v->type->toBasetype(); |
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254 size_t dim = 1; |
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255 while (tv->ty == Tsarray) |
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256 { TypeSArray *ta = (TypeSArray *)tv; |
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257 dim *= ((TypeSArray *)tv)->dim->toInteger(); |
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258 tv = tv->nextOf()->toBasetype(); |
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259 } |
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260 if (tv->ty == Tstruct) |
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261 { TypeStruct *ts = (TypeStruct *)tv; |
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262 StructDeclaration *sd = ts->sym; |
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263 if (sd->postblit) |
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264 { Expression *ex; |
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265 |
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266 // this.v |
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267 ex = new ThisExp(0); |
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268 ex = new DotVarExp(0, ex, v, 0); |
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269 |
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270 if (dim == 1) |
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271 { // this.v.dtor() |
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272 ex = new DotVarExp(0, ex, sd->postblit, 0); |
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273 ex = new CallExp(0, ex); |
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274 } |
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275 else |
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276 { |
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277 // Typeinfo.postblit(cast(void*)&this.v); |
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278 Expression *ea = new AddrExp(0, ex); |
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279 ea = new CastExp(0, ea, Type::tvoid->pointerTo()); |
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280 |
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281 Expression *et = v->type->getTypeInfo(sc); |
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282 et = new DotIdExp(0, et, Id::postblit); |
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283 |
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284 ex = new CallExp(0, et, ea); |
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285 } |
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286 e = Expression::combine(e, ex); // combine in forward order |
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287 } |
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288 } |
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289 } |
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290 |
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291 /* Build our own "postblit" which executes e |
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292 */ |
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293 if (e) |
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294 { //printf("Building __fieldPostBlit()\n"); |
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295 PostBlitDeclaration *dd = new PostBlitDeclaration(0, 0, Lexer::idPool("__fieldPostBlit")); |
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296 dd->fbody = new ExpStatement(0, e); |
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297 dtors.push(dd); |
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298 members->push(dd); |
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299 dd->semantic(sc); |
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300 } |
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301 |
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302 switch (postblits.dim) |
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303 { |
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304 case 0: |
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305 return NULL; |
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306 |
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307 case 1: |
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308 return (FuncDeclaration *)postblits.data[0]; |
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309 |
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310 default: |
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311 e = NULL; |
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312 for (size_t i = 0; i < postblits.dim; i++) |
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313 { FuncDeclaration *fd = (FuncDeclaration *)postblits.data[i]; |
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314 Expression *ex = new ThisExp(0); |
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315 ex = new DotVarExp(0, ex, fd, 0); |
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316 ex = new CallExp(0, ex); |
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317 e = Expression::combine(e, ex); |
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318 } |
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319 PostBlitDeclaration *dd = new PostBlitDeclaration(0, 0, Lexer::idPool("__aggrPostBlit")); |
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320 dd->fbody = new ExpStatement(0, e); |
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321 members->push(dd); |
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322 dd->semantic(sc); |
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323 return dd; |
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324 } |
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325 } |
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326 |
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327 #endif |
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328 |
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329 /***************************************** |
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330 * Create inclusive destructor for struct/class by aggregating |
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331 * all the destructors in dtors[] with the destructors for |
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332 * all the members. |
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333 * Note the close similarity with StructDeclaration::buildPostBlit(), |
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334 * and the ordering changes (runs backward instead of forwards). |
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335 */ |
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336 |
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337 FuncDeclaration *AggregateDeclaration::buildDtor(Scope *sc) |
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338 { |
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339 //printf("AggregateDeclaration::buildDtor() %s\n", toChars()); |
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340 Expression *e = NULL; |
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341 |
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342 #if DMDV2 |
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343 for (size_t i = 0; i < fields.dim; i++) |
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344 { |
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345 Dsymbol *s = (Dsymbol *)fields.data[i]; |
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346 VarDeclaration *v = s->isVarDeclaration(); |
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347 assert(v && v->storage_class & STCfield); |
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348 Type *tv = v->type->toBasetype(); |
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349 size_t dim = 1; |
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350 while (tv->ty == Tsarray) |
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351 { TypeSArray *ta = (TypeSArray *)tv; |
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352 dim *= ((TypeSArray *)tv)->dim->toInteger(); |
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353 tv = tv->nextOf()->toBasetype(); |
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354 } |
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355 if (tv->ty == Tstruct) |
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356 { TypeStruct *ts = (TypeStruct *)tv; |
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357 StructDeclaration *sd = ts->sym; |
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358 if (sd->dtor) |
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359 { Expression *ex; |
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360 |
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361 // this.v |
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362 ex = new ThisExp(0); |
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363 ex = new DotVarExp(0, ex, v, 0); |
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364 |
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365 if (dim == 1) |
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366 { // this.v.dtor() |
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367 ex = new DotVarExp(0, ex, sd->dtor, 0); |
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368 ex = new CallExp(0, ex); |
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369 } |
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370 else |
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371 { |
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372 // Typeinfo.destroy(cast(void*)&this.v); |
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373 Expression *ea = new AddrExp(0, ex); |
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374 ea = new CastExp(0, ea, Type::tvoid->pointerTo()); |
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375 |
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376 Expression *et = v->type->getTypeInfo(sc); |
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377 et = new DotIdExp(0, et, Id::destroy); |
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378 |
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379 ex = new CallExp(0, et, ea); |
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380 } |
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381 e = Expression::combine(ex, e); // combine in reverse order |
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382 } |
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383 } |
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384 } |
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385 |
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386 /* Build our own "destructor" which executes e |
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387 */ |
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388 if (e) |
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389 { //printf("Building __fieldDtor()\n"); |
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390 DtorDeclaration *dd = new DtorDeclaration(0, 0, Lexer::idPool("__fieldDtor")); |
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391 dd->fbody = new ExpStatement(0, e); |
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392 dtors.shift(dd); |
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393 members->push(dd); |
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394 dd->semantic(sc); |
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395 } |
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396 #endif |
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397 |
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398 switch (dtors.dim) |
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399 { |
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400 case 0: |
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401 return NULL; |
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402 |
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403 case 1: |
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404 return (FuncDeclaration *)dtors.data[0]; |
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405 |
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406 default: |
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407 e = NULL; |
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408 for (size_t i = 0; i < dtors.dim; i++) |
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409 { FuncDeclaration *fd = (FuncDeclaration *)dtors.data[i]; |
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410 Expression *ex = new ThisExp(0); |
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411 ex = new DotVarExp(0, ex, fd, 0); |
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412 ex = new CallExp(0, ex); |
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413 e = Expression::combine(ex, e); |
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414 } |
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
|
415 DtorDeclaration *dd = new DtorDeclaration(0, 0, Lexer::idPool("__aggrDtor")); |
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
|
416 dd->fbody = new ExpStatement(0, e); |
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
|
417 members->push(dd); |
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
|
418 dd->semantic(sc); |
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
|
419 return dd; |
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
|
420 } |
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
|
421 } |
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
|
422 |
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
|
423 |