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annotate dmd/TypeSlice.d @ 126:1765f3ef917d

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ClassDeclarations, Arguments -> Vector
author Eldar Insafutdinov <e.insafutdinov@gmail.com>
date Fri, 03 Sep 2010 23:25:55 +0100
parents e28b18c23469
children 60bb0fe4563e
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1 module dmd.TypeSlice;
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2
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3 import dmd.common;
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4 import dmd.Type;
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5 import dmd.TypeNext;
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6 import dmd.MOD;
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7 import dmd.Expression;
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8 import dmd.Loc;
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9 import dmd.Scope;
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10 import dmd.Dsymbol;
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11 import dmd.OutBuffer;
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12 import dmd.HdrGenState;
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13 import dmd.TY;
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14 import dmd.TypeTuple;
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15 import dmd.WANT;
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16 import dmd.ArrayTypes;
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17 import dmd.Argument;
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18 import dmd.SliceExp;
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19 import dmd.TupleDeclaration;
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20 import dmd.ScopeDsymbol;
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21 import dmd.ArrayScopeSymbol;
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22
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23 import dmd.type.Util;
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24
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25 class TypeSlice : TypeNext
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26 {
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27 Expression lwr;
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28 Expression upr;
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29
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30 this(Type next, Expression lwr, Expression upr)
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31 {
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32 super(TY.Tslice, next);
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33 //printf("TypeSlice[%s .. %s]\n", lwr.toChars(), upr.toChars());
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34 this.lwr = lwr;
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35 this.upr = upr;
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36 }
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37
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38 version (DumbClone) {
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39 } else {
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40 Type clone()
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41 {
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42 assert(false);
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43 }
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44 }
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45
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46 override Type syntaxCopy()
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47 {
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48 Type t = new TypeSlice(next.syntaxCopy(), lwr.syntaxCopy(), upr.syntaxCopy());
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49 t.mod = mod;
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50 return t;
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51 }
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52
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53 override Type semantic(Loc loc, Scope sc)
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54 {
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55 //printf("TypeSlice.semantic() %s\n", toChars());
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56 next = next.semantic(loc, sc);
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57 transitive();
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58 //printf("next: %s\n", next.toChars());
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59
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60 Type tbn = next.toBasetype();
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61 if (tbn.ty != Ttuple)
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62 {
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63 error(loc, "can only slice tuple types, not %s", tbn.toChars());
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64 return Type.terror;
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65 }
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66 TypeTuple tt = cast(TypeTuple)tbn;
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67
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68 lwr = semanticLength(sc, tbn, lwr);
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69 lwr = lwr.optimize(WANTvalue);
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70 ulong i1 = lwr.toUInteger();
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71
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72 upr = semanticLength(sc, tbn, upr);
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73 upr = upr.optimize(WANTvalue);
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74 ulong i2 = upr.toUInteger();
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75
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76 if (!(i1 <= i2 && i2 <= tt.arguments.dim))
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77 {
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78 error(loc, "slice [%ju..%ju] is out of range of [0..%u]", i1, i2, tt.arguments.dim);
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79 return Type.terror;
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80 }
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81
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82 auto args = new Arguments;
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83 args.reserve(cast(size_t)(i2 - i1));
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84 for (size_t i = cast(size_t)i1; i < cast(size_t)i2; i++)
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85 {
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86 auto arg = tt.arguments[i];
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87 args.push(arg);
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88 }
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89
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90 return new TypeTuple(args);
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91 }
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92
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93 override void resolve(Loc loc, Scope sc, Expression* pe, Type* pt, Dsymbol* ps)
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94 {
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95 next.resolve(loc, sc, pe, pt, ps);
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96 if (*pe)
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97 { // It's really a slice expression
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98 Expression e;
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99 e = new SliceExp(loc, *pe, lwr, upr);
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100 *pe = e;
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101 }
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102 else if (*ps)
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103 {
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104 Dsymbol s = *ps;
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105 TupleDeclaration td = s.isTupleDeclaration();
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106 if (td)
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107 {
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108 /* It's a slice of a TupleDeclaration
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109 */
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110 ScopeDsymbol sym = new ArrayScopeSymbol(sc, td);
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111 sym.parent = sc.scopesym;
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112 sc = sc.push(sym);
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113
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114 lwr = lwr.semantic(sc);
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115 lwr = lwr.optimize(WANTvalue);
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116 ulong i1 = lwr.toUInteger();
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117
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118 upr = upr.semantic(sc);
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119 upr = upr.optimize(WANTvalue);
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120 ulong i2 = upr.toUInteger();
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121
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122 sc = sc.pop();
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123
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124 if (!(i1 <= i2 && i2 <= td.objects.dim))
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125 {
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126 error(loc, "slice [%ju..%ju] is out of range of [0..%u]", i1, i2, td.objects.dim);
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127 goto Ldefault;
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128 }
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129
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130 if (i1 == 0 && i2 == td.objects.dim)
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131 {
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132 *ps = td;
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133 return;
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134 }
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135
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136 /* Create a new TupleDeclaration which
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137 * is a slice [i1..i2] out of the old one.
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138 */
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139 auto objects = new Objects;
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140 objects.setDim(cast(uint)(i2 - i1));
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141 for (size_t i = 0; i < objects.dim; i++)
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142 {
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143 objects[i] = td.objects[cast(size_t)i1 + i];
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144 }
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145
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146 auto tds = new TupleDeclaration(loc, td.ident, objects);
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147 *ps = tds;
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148 }
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149 else
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150 goto Ldefault;
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151 }
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152 else
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153 {
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154 Ldefault:
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155 Type.resolve(loc, sc, pe, pt, ps);
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156 }
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157 }
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158
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159 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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160 {
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161 assert(false);
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162 }
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163 }