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1 module dmd.ArrayLiteralExp;
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2
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3 import dmd.Expression;
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4 import dmd.backend.elem;
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5 import dmd.InterState;
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6 import dmd.MATCH;
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7 import dmd.Type;
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8 import dmd.OutBuffer;
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9 import dmd.Loc;
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10 import dmd.WANT;
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11 import dmd.Scope;
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12 import dmd.InlineCostState;
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13 import dmd.IRState;
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14 import dmd.InlineDoState;
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15 import dmd.HdrGenState;
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16 import dmd.backend.dt_t;
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17 import dmd.InlineScanState;
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18 import dmd.ArrayTypes;
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19 import dmd.TOK;
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20 import dmd.IntegerExp;
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21 import dmd.TypeSArray;
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22 import dmd.TY;
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23 import dmd.StringExp;
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24
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25 import dmd.expression.Util;
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26 import dmd.backend.Util;
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27 import dmd.backend.RTLSYM;
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28 import dmd.backend.OPER;
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29 import dmd.backend.TYM;
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30 import dmd.backend.mTY;
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31
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32 class ArrayLiteralExp : Expression
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33 {
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34 Expressions elements;
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35
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36 this(Loc loc, Expressions elements)
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37 {
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38 super(loc, TOK.TOKarrayliteral, ArrayLiteralExp.sizeof);
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39 this.elements = elements;
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40 }
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41
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42 this(Loc loc, Expression e)
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43 {
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44 super(loc, TOK.TOKarrayliteral, ArrayLiteralExp.sizeof);
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45 elements = new Expressions();
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46 elements.push(cast(void*)e);
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47 }
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48
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49 Expression syntaxCopy()
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50 {
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51 return new ArrayLiteralExp(loc, arraySyntaxCopy(elements));
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52 }
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53
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54 Expression semantic(Scope sc)
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55 {
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56 Expression e;
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57 Type t0 = null;
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58
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59 version (LOGSEMANTIC) {
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60 printf("ArrayLiteralExp.semantic('%s')\n", toChars());
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61 }
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62 if (type)
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63 return this;
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64
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65 // Run semantic() on each element
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66 for (int i = 0; i < elements.dim; i++)
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67 {
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68 e = cast(Expression)elements.data[i];
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69 e = e.semantic(sc);
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70 assert(e.type);
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71 elements.data[i] = cast(void*)e;
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72 }
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73
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74 expandTuples(elements);
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75
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76 for (int i = 0; i < elements.dim; i++)
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77 {
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78 e = cast(Expression)elements.data[i];
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79
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80 if (!e.type)
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81 error("%s has no value", e.toChars());
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82
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83 e = resolveProperties(sc, e);
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84
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85 ubyte committed = 1;
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86 if (e.op == TOKstring)
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87 committed = (cast(StringExp)e).committed;
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88
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89 if (!t0)
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90 {
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91 t0 = e.type;
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92 // Convert any static arrays to dynamic arrays
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93 if (t0.ty == Tsarray)
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94 {
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95 t0 = (cast(TypeSArray)t0).next.arrayOf();
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96 e = e.implicitCastTo(sc, t0);
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97 }
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98 }
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99 else
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100 e = e.implicitCastTo(sc, t0);
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101
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102 if (!committed && e.op == TOKstring)
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103 {
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104 StringExp se = cast(StringExp)e;
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105 se.committed = 0;
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106 }
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107 elements.data[i] = cast(void*)e;
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108 }
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109
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110 if (!t0)
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111 t0 = Type.tvoid;
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112 type = new TypeSArray(t0, new IntegerExp(elements.dim));
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113 type = type.semantic(loc, sc);
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114 return this;
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115 }
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116
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117 bool isBool(bool result)
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118 {
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119 size_t dim = elements ? elements.dim : 0;
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120 return result ? (dim != 0) : (dim == 0);
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121 }
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122
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123 elem* toElem(IRState* irs)
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124 {
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125 elem* e;
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126 size_t dim;
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127
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128 //printf("ArrayLiteralExp.toElem() %s\n", toChars());
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129 if (elements)
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130 {
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131 scope Expressions args = new Expressions();
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132 dim = elements.dim;
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133 args.setDim(dim + 1); // +1 for number of args parameter
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134 e = el_long(TYint, dim);
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135 args.data[dim] = cast(void*)e;
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136 for (size_t i = 0; i < dim; i++)
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137 {
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138 Expression el = cast(Expression)elements.data[i];
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139 elem* ep = el.toElem(irs);
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140
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141 if (tybasic(ep.Ety) == TYstruct || tybasic(ep.Ety) == TYarray)
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142 {
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143 ep = el_una(OPstrpar, TYstruct, ep);
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144 ep.Enumbytes = cast(uint)el.type.size();
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145 }
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146 args.data[dim - (i + 1)] = cast(void *)ep;
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147 }
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148
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149 /* Because the number of parameters can get very large, produce
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150 * a balanced binary tree so we don't blow up the stack in
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151 * the subsequent tree walking code.
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152 */
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153 e = el_params(args.data, dim + 1);
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154 }
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155 else
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156 {
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157 dim = 0;
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158 e = el_long(TYint, 0);
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159 }
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160 Type tb = type.toBasetype();
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161 static if (true) {
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162 e = el_param(e, type.getTypeInfo(null).toElem(irs));
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163
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164 // call _d_arrayliteralT(ti, dim, ...)
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165 e = el_bin(OPcall,TYnptr,el_var(rtlsym[RTLSYM_ARRAYLITERALT]),e);
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166 } else {
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167 e = el_param(e, el_long(TYint, tb.next.size()));
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168
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169 // call _d_arrayliteral(size, dim, ...)
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170 e = el_bin(OPcall,TYnptr,el_var(rtlsym[RTLSYM_ARRAYLITERAL]),e);
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171 }
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172 if (tb.ty == Tarray)
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173 {
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174 e = el_pair(TYullong, el_long(TYint, dim), e);
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175 }
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176 else if (tb.ty == Tpointer)
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177 {
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178 }
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179 else
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180 {
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181 e = el_una(OPind,TYstruct,e);
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182 e.Enumbytes = cast(uint)type.size();
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183 }
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184
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185 el_setLoc(e,loc);
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186 return e;
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187 }
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188
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189 bool checkSideEffect(int flag)
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190 {
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191 bool f = false;
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192
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193 for (size_t i = 0; i < elements.dim; i++)
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194 {
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195 Expression e = cast(Expression)elements.data[i];
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196 f |= e.checkSideEffect(2);
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197 }
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198 if (flag == 0 && f == false)
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199 Expression.checkSideEffect(0);
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200
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201 return f;
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202 }
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203
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204 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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205 {
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206 buf.writeByte('[');
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207 argsToCBuffer(buf, elements, hgs);
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208 buf.writeByte(']');
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209 }
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210
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211 void toMangleBuffer(OutBuffer buf)
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212 {
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213 size_t dim = elements ? elements.dim : 0;
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214 buf.printf("A%u", dim);
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215 for (size_t i = 0; i < dim; i++)
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216 {
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217 Expression e = cast(Expression)elements.data[i];
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218 e.toMangleBuffer(buf);
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219 }
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220 }
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221
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222 void scanForNestedRef(Scope sc)
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223 {
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224 assert(false);
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225 }
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226
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227 Expression optimize(int result)
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228 {
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229 if (elements)
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230 {
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231 for (size_t i = 0; i < elements.dim; i++)
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232 {
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233 Expression e = cast(Expression)elements.data[i];
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234
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235 e = e.optimize(WANTvalue | (result & WANTinterpret));
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236 elements.data[i] = cast(void*)e;
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237 }
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238 }
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239
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240 return this;
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241 }
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242
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63
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243 Expression interpret(InterState istate)
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0
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244 {
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245 assert(false);
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246 }
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247
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248 MATCH implicitConvTo(Type t)
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249 {
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250 MATCH result = MATCHexact;
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251
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252 static if (false) {
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253 printf("ArrayLiteralExp.implicitConvTo(this=%s, type=%s, t=%s)\n",
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254 toChars(), type.toChars(), t.toChars());
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255 }
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256 Type typeb = type.toBasetype();
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257 Type tb = t.toBasetype();
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258 if ((tb.ty == Tarray || tb.ty == Tsarray) &&
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259 (typeb.ty == Tarray || typeb.ty == Tsarray))
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260 {
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261 if (tb.ty == Tsarray)
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262 {
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263 TypeSArray tsa = cast(TypeSArray)tb;
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264 if (elements.dim != tsa.dim.toInteger())
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265 result = MATCHnomatch;
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266 }
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267
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268 for (int i = 0; i < elements.dim; i++)
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269 {
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270 Expression e = cast(Expression)elements.data[i];
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271 MATCH m = cast(MATCH)e.implicitConvTo(tb.nextOf());
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272 if (m < result)
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273 result = m; // remember worst match
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274 if (result == MATCHnomatch)
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275 break; // no need to check for worse
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276 }
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277 return result;
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278 }
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279 else
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280 return Expression.implicitConvTo(t);
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281 }
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282
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283 Expression castTo(Scope sc, Type t)
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284 {
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285 static if (false) {
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286 printf("ArrayLiteralExp.castTo(this=%s, type=%s, => %s)\n",
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287 toChars(), type.toChars(), t.toChars());
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288 }
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289 if (type == t)
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290 return this;
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291 ArrayLiteralExp e = this;
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292 Type typeb = type.toBasetype();
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293 Type tb = t.toBasetype();
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294 if ((tb.ty == Tarray || tb.ty == Tsarray) &&
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295 (typeb.ty == Tarray || typeb.ty == Tsarray) &&
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296 // Not trying to convert non-void[] to void[]
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297 !(tb.nextOf().toBasetype().ty == Tvoid && typeb.nextOf().toBasetype().ty != Tvoid))
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298 {
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299 if (tb.ty == Tsarray)
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300 {
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301 TypeSArray tsa = cast(TypeSArray)tb;
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302 if (elements.dim != tsa.dim.toInteger())
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303 goto L1;
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304 }
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305
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306 e = cast(ArrayLiteralExp)copy();
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307 e.elements = cast(Expressions)elements.copy();
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308 for (int i = 0; i < elements.dim; i++)
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309 {
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310 Expression ex = cast(Expression)elements.data[i];
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311 ex = ex.castTo(sc, tb.nextOf());
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312 e.elements.data[i] = cast(void*)ex;
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313 }
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314 e.type = t;
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315 return e;
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316 }
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317 if (tb.ty == Tpointer && typeb.ty == Tsarray)
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318 {
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319 Type tp = typeb.nextOf().pointerTo();
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320 if (!tp.equals(e.type))
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321 {
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322 e = cast(ArrayLiteralExp)copy();
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323 e.type = tp;
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324 }
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325 }
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326 L1:
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327 return e.Expression.castTo(sc, t);
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328 }
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329
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330 dt_t** toDt(dt_t** pdt)
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331 {
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332 assert(false);
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333 }
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334
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335 version (DMDV2) {
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336 bool canThrow()
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337 {
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338 return 1; // because it can fail allocating memory
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339 }
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340 }
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341 int inlineCost(InlineCostState* ics)
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342 {
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343 return 1 + arrayInlineCost(ics, elements);
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344 }
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345
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346 Expression doInline(InlineDoState ids)
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347 {
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348 ArrayLiteralExp ce = cast(ArrayLiteralExp)copy();
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349 ce.elements = arrayExpressiondoInline(elements, ids);
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350 return ce;
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351 }
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352
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353 Expression inlineScan(InlineScanState* iss)
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354 {
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355 Expression e = this;
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356
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357 //printf("ArrayLiteralExp.inlineScan()\n");
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358 arrayInlineScan(iss, elements);
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359
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360 return e;
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361 }
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362 }
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363
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