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2 // Copyright (c) 1999-2008 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 #include "enum.h"
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15 #include "mtype.h"
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16 #include "scope.h"
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336
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17 #include "declaration.h"
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1
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18
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19 /********************************* EnumDeclaration ****************************/
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20
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21 EnumDeclaration::EnumDeclaration(Loc loc, Identifier *id, Type *memtype)
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22 : ScopeDsymbol(id)
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23 {
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24 this->loc = loc;
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25 type = new TypeEnum(this);
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26 this->memtype = memtype;
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27 maxval = 0;
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28 minval = 0;
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29 defaultval = 0;
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30 sinit = NULL;
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336
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31 isdeprecated = 0;
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1
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32 }
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33
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34 Dsymbol *EnumDeclaration::syntaxCopy(Dsymbol *s)
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35 {
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36 Type *t = NULL;
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37 if (memtype)
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38 t = memtype->syntaxCopy();
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39
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40 EnumDeclaration *ed;
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41 if (s)
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42 { ed = (EnumDeclaration *)s;
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43 ed->memtype = t;
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44 }
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45 else
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46 ed = new EnumDeclaration(loc, ident, t);
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47 ScopeDsymbol::syntaxCopy(ed);
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48 return ed;
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49 }
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50
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51 void EnumDeclaration::semantic(Scope *sc)
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52 { int i;
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53 uinteger_t number;
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54 Type *t;
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55 Scope *sce;
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56
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57 //printf("EnumDeclaration::semantic(sd = %p, '%s')\n", sc->scopesym, sc->scopesym->toChars());
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58 if (symtab) // if already done
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59 return;
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60 if (!memtype)
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61 memtype = Type::tint32;
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336
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62 if (sc->stc & STCdeprecated)
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63 isdeprecated = 1;
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64
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1
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65 parent = sc->scopesym;
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66 memtype = memtype->semantic(loc, sc);
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67
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68 /* Check to see if memtype is forward referenced
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69 */
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70 if (memtype->ty == Tenum)
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71 { EnumDeclaration *sym = (EnumDeclaration *)memtype->toDsymbol(sc);
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72 if (!sym->memtype)
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73 {
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74 error("base enum %s is forward referenced", sym->toChars());
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75 memtype = Type::tint32;
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76 }
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77 }
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78
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79 if (!memtype->isintegral())
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80 { error("base type must be of integral type, not %s", memtype->toChars());
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81 memtype = Type::tint32;
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82 }
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83
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84 t = isAnonymous() ? memtype : type;
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85 symtab = new DsymbolTable();
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86 sce = sc->push(this);
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87 sce->parent = this;
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88 number = 0;
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89 if (!members) // enum ident;
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90 return;
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91 if (members->dim == 0)
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92 error("enum %s must have at least one member", toChars());
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93 int first = 1;
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94 for (i = 0; i < members->dim; i++)
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95 {
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96 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
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97 Expression *e;
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98
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99 if (!em)
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100 /* The e->semantic(sce) can insert other symbols, such as
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101 * template instances and function literals.
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102 */
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103 continue;
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104
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105 //printf("Enum member '%s'\n",em->toChars());
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106 e = em->value;
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107 if (e)
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108 {
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109 assert(e->dyncast() == DYNCAST_EXPRESSION);
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110 e = e->semantic(sce);
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111 e = e->optimize(WANTvalue);
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112 // Need to copy it because we're going to change the type
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113 e = e->copy();
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114 e = e->implicitCastTo(sc, memtype);
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115 e = e->optimize(WANTvalue);
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116 number = e->toInteger();
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117 e->type = t;
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118 }
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119 else
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120 { // Default is the previous number plus 1
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121
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122 // Check for overflow
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123 if (!first)
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124 {
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125 switch (t->toBasetype()->ty)
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126 {
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127 case Tbool:
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128 if (number == 2) goto Loverflow;
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129 break;
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130
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131 case Tint8:
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132 if (number == 128) goto Loverflow;
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133 break;
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134
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135 case Tchar:
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136 case Tuns8:
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137 if (number == 256) goto Loverflow;
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138 break;
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139
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140 case Tint16:
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141 if (number == 0x8000) goto Loverflow;
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142 break;
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143
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144 case Twchar:
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145 case Tuns16:
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146 if (number == 0x10000) goto Loverflow;
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147 break;
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148
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149 case Tint32:
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150 if (number == 0x80000000) goto Loverflow;
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151 break;
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152
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153 case Tdchar:
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154 case Tuns32:
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155 if (number == 0x100000000LL) goto Loverflow;
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156 break;
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157
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158 case Tint64:
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159 if (number == 0x8000000000000000LL) goto Loverflow;
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160 break;
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161
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162 case Tuns64:
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163 if (number == 0) goto Loverflow;
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164 break;
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165
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166 Loverflow:
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167 error("overflow of enum value");
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168 break;
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169
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170 default:
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171 assert(0);
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172 }
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173 }
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174 e = new IntegerExp(em->loc, number, t);
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175 }
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176 em->value = e;
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177
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178 // Add to symbol table only after evaluating 'value'
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179 if (isAnonymous())
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180 {
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181 //sce->enclosing->insert(em);
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182 for (Scope *scx = sce->enclosing; scx; scx = scx->enclosing)
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183 {
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184 if (scx->scopesym)
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185 {
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186 if (!scx->scopesym->symtab)
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187 scx->scopesym->symtab = new DsymbolTable();
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188 em->addMember(sce, scx->scopesym, 1);
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189 break;
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190 }
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191 }
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192 }
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193 else
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194 em->addMember(sc, this, 1);
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195
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196 if (first)
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197 { first = 0;
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198 defaultval = number;
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199 minval = number;
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200 maxval = number;
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201 }
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202 else if (memtype->isunsigned())
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203 {
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204 if (number < minval)
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205 minval = number;
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206 if (number > maxval)
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207 maxval = number;
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208 }
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209 else
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210 {
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211 if ((sinteger_t)number < (sinteger_t)minval)
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212 minval = number;
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213 if ((sinteger_t)number > (sinteger_t)maxval)
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214 maxval = number;
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215 }
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216
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217 number++;
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218 }
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219 //printf("defaultval = %lld\n", defaultval);
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220
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221 sce->pop();
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222 //members->print();
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223 }
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224
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225 int EnumDeclaration::oneMember(Dsymbol **ps)
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226 {
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227 if (isAnonymous())
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228 return Dsymbol::oneMembers(members, ps);
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229 return Dsymbol::oneMember(ps);
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230 }
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231
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232 void EnumDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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233 { int i;
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234
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235 buf->writestring("enum ");
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236 if (ident)
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237 { buf->writestring(ident->toChars());
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238 buf->writeByte(' ');
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239 }
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240 if (memtype)
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241 {
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242 buf->writestring(": ");
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243 memtype->toCBuffer(buf, NULL, hgs);
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244 }
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245 if (!members)
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246 {
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247 buf->writeByte(';');
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248 buf->writenl();
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249 return;
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250 }
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251 buf->writenl();
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252 buf->writeByte('{');
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253 buf->writenl();
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254 for (i = 0; i < members->dim; i++)
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255 {
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256 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
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257 if (!em)
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258 continue;
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259 //buf->writestring(" ");
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260 em->toCBuffer(buf, hgs);
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261 buf->writeByte(',');
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262 buf->writenl();
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263 }
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264 buf->writeByte('}');
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265 buf->writenl();
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266 }
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267
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268 Type *EnumDeclaration::getType()
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269 {
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270 return type;
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271 }
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272
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336
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273 const char *EnumDeclaration::kind()
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274 {
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275 return "enum";
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276 }
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277
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336
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278 int EnumDeclaration::isDeprecated()
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279 {
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280 return isdeprecated;
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281 }
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282
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283 /********************************* EnumMember ****************************/
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284
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285 EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value)
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286 : Dsymbol(id)
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287 {
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288 this->value = value;
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289 this->loc = loc;
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290 }
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291
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292 Dsymbol *EnumMember::syntaxCopy(Dsymbol *s)
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293 {
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294 Expression *e = NULL;
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295 if (value)
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296 e = value->syntaxCopy();
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297
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298 EnumMember *em;
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299 if (s)
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300 { em = (EnumMember *)s;
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301 em->loc = loc;
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302 em->value = e;
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303 }
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304 else
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305 em = new EnumMember(loc, ident, e);
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306 return em;
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307 }
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308
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309 void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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310 {
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311 buf->writestring(ident->toChars());
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312 if (value)
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313 {
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314 buf->writestring(" = ");
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315 value->toCBuffer(buf, hgs);
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316 }
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317 }
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318
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336
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319 const char *EnumMember::kind()
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1
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320 {
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321 return "enum member";
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322 }
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323
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324
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