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72
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1 module dmd.CallExp;
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2
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3 import dmd.Expression;
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4 import dmd.Cast;
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5 import dmd.WANT;
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6 import dmd.BUILTIN;
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7 import dmd.TypeFunction;
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8 import dmd.ScopeDsymbol;
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9 import dmd.CastExp;
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10 import dmd.GlobalExpressions;
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11 import dmd.TypePointer;
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12 import dmd.ThisExp;
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13 import dmd.OverExp;
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14 import dmd.Dsymbol;
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15 import dmd.CSX;
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16 import dmd.AggregateDeclaration;
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17 import dmd.TypeDelegate;
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18 import dmd.ClassDeclaration;
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19 import dmd.DsymbolExp;
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20 import dmd.DotExp;
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21 import dmd.TemplateExp;
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22 import dmd.TypeStruct;
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23 import dmd.TypeClass;
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24 import dmd.Identifier;
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25 import dmd.Lexer;
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26 import dmd.VarDeclaration;
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27 import dmd.DeclarationExp;
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28 import dmd.CtorDeclaration;
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29 import dmd.PtrExp;
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30 import dmd.TemplateDeclaration;
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31 import dmd.StructLiteralExp;
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32 import dmd.StructDeclaration;
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33 import dmd.DotTemplateExp;
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34 import dmd.CommaExp;
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35 import dmd.AggregateDeclaration;
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36 import dmd.FuncDeclaration;
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37 import dmd.Type;
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38 import dmd.ScopeExp;
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39 import dmd.VarExp;
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40 import dmd.STC;
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41 import dmd.LINK;
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42 import dmd.Global;
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43 import dmd.DotTemplateInstanceExp;
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44 import dmd.TemplateInstance;
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45 import dmd.DelegateExp;
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46 import dmd.IdentifierExp;
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47 import dmd.DotVarExp;
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48 import dmd.DotIdExp;
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49 import dmd.TY;
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50 import dmd.Id;
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51 import dmd.TypeAArray;
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52 import dmd.RemoveExp;
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53 import dmd.backend.elem;
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54 import dmd.UnaExp;
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55 import dmd.InterState;
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56 import dmd.OutBuffer;
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57 import dmd.Loc;
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58 import dmd.Scope;
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59 import dmd.InlineCostState;
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60 import dmd.IRState;
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61 import dmd.InlineDoState;
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62 import dmd.HdrGenState;
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63 import dmd.InlineScanState;
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64 import dmd.ArrayTypes;
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65 import dmd.TOK;
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66 import dmd.PREC;
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67 import dmd.expression.Util;
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68 import dmd.backend.Symbol;
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69 import dmd.backend.TYPE;
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70 import dmd.backend.Util;
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71 import dmd.backend.TYM;
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72 import dmd.codegen.Util;
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73
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74 import std.stdio;
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75
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0
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76 class CallExp : UnaExp
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77 {
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78 Expressions arguments;
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79
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80 this(Loc loc, Expression e, Expressions exps)
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81 {
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72
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82 super(loc, TOK.TOKcall, CallExp.sizeof, e);
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0
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83 this.arguments = exps;
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84 }
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85
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86 this(Loc loc, Expression e)
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87 {
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88 super(loc, TOK.TOKcall, CallExp.sizeof, e);
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89 }
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90
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91 this(Loc loc, Expression e, Expression earg1)
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92 {
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72
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93 super(loc, TOK.TOKcall, CallExp.sizeof, e);
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94
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95 Expressions arguments = new Expressions();
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73
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96 if (earg1)
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97 {
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98 arguments.setDim(1);
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99 arguments.data[0] = cast(void*)earg1;
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100 }
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0
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101 this.arguments = arguments;
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102 }
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103
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104 this(Loc loc, Expression e, Expression earg1, Expression earg2)
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72
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105 {
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106 super(loc, TOK.TOKcall, CallExp.sizeof, e);
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66
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107
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72
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108 Expressions arguments = new Expressions();
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109 arguments.setDim(2);
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110 arguments.data[0] = cast(void*)earg1;
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111 arguments.data[1] = cast(void*)earg2;
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112
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66
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113 this.arguments = arguments;
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0
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114 }
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115
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72
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116 override Expression syntaxCopy()
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0
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117 {
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118 return new CallExp(loc, e1.syntaxCopy(), arraySyntaxCopy(arguments));
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119 }
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120
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72
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121 override Expression semantic(Scope sc)
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122 {
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123 TypeFunction tf;
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124 FuncDeclaration f;
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125 int i;
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126 Type t1;
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127 int istemp;
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128 Objects targsi; // initial list of template arguments
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129 TemplateInstance tierror;
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130
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131 version (LOGSEMANTIC) {
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132 printf("CallExp.semantic() %s\n", toChars());
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133 }
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134 if (type)
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135 return this; // semantic() already run
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136
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137 static if (false) {
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138 if (arguments && arguments.dim)
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139 {
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140 Expression earg = cast(Expression)arguments.data[0];
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141 earg.print();
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142 if (earg.type) earg.type.print();
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143 }
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144 }
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145
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146 if (e1.op == TOK.TOKdelegate)
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147 {
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148 DelegateExp de = cast(DelegateExp)e1;
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149
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150 e1 = new DotVarExp(de.loc, de.e1, de.func);
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151 return semantic(sc);
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152 }
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153
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154 /* Transform:
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155 * array.id(args) into .id(array,args)
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156 * aa.remove(arg) into delete aa[arg]
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157 */
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158 if (e1.op == TOK.TOKdot)
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159 {
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160 // BUG: we should handle array.a.b.c.e(args) too
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161
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162 DotIdExp dotid = cast(DotIdExp)(e1);
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163 dotid.e1 = dotid.e1.semantic(sc);
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164 assert(dotid.e1);
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165 if (dotid.e1.type)
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166 {
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167 TY e1ty = dotid.e1.type.toBasetype().ty;
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168 if (e1ty == TY.Taarray && dotid.ident == Id.remove)
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169 {
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170 if (!arguments || arguments.dim != 1)
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171 {
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172 error("expected key as argument to aa.remove()");
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173 goto Lagain;
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174 }
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175 Expression key = cast(Expression)arguments.data[0];
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176 key = key.semantic(sc);
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177 key = resolveProperties(sc, key);
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178 key.rvalue();
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179
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180 TypeAArray taa = cast(TypeAArray)dotid.e1.type.toBasetype();
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181 key = key.implicitCastTo(sc, taa.index);
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182
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183 return new RemoveExp(loc, dotid.e1, key);
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184 }
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185 else if (e1ty == TY.Tarray || e1ty == TY.Tsarray || e1ty == TY.Taarray)
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186 {
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187 if (!arguments)
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188 arguments = new Expressions();
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189 arguments.shift(cast(void*)dotid.e1);
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190 version (DMDV2) {
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191 e1 = new DotIdExp(dotid.loc, new IdentifierExp(dotid.loc, Id.empty), dotid.ident);
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192 } else {
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193 e1 = new IdentifierExp(dotid.loc, dotid.ident);
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194 }
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195 }
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196 }
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197 }
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198
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199 static if (true) {
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200 /* This recognizes:
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201 * foo!(tiargs)(funcargs)
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202 */
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203 if (e1.op == TOK.TOKimport && !e1.type)
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204 {
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205 ScopeExp se = cast(ScopeExp)e1;
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206 TemplateInstance ti = se.sds.isTemplateInstance();
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207 if (ti && !ti.semanticRun)
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208 {
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209 /* Attempt to instantiate ti. If that works, go with it.
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210 * If not, go with partial explicit specialization.
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211 */
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212 ti.semanticTiargs(sc);
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213 uint errors = global.errors;
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214 global.gag++;
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215 ti.semantic(sc);
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216 global.gag--;
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217 if (errors != global.errors)
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218 {
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219 /* Didn't work, go with partial explicit specialization
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220 */
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221 global.errors = errors;
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222 targsi = ti.tiargs;
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223 tierror = ti; // for error reporting
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224 e1 = new IdentifierExp(loc, ti.name);
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225 }
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226 }
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227 }
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228
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229 /* This recognizes:
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230 * expr.foo!(tiargs)(funcargs)
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231 */
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232 if (e1.op == TOK.TOKdotti && !e1.type)
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233 {
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234 DotTemplateInstanceExp se = cast(DotTemplateInstanceExp)e1;
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235 TemplateInstance ti = se.ti;
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236 if (!ti.semanticRun)
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237 {
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238 /* Attempt to instantiate ti. If that works, go with it.
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239 * If not, go with partial explicit specialization.
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240 */
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241 ti.semanticTiargs(sc);
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242 Expression etmp = e1.trySemantic(sc);
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243 if (etmp)
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244 e1 = etmp; // it worked
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245 else // didn't work
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246 {
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247 targsi = ti.tiargs;
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248 tierror = ti; // for error reporting
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249 e1 = new DotIdExp(loc, se.e1, ti.name);
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250 }
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251 }
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252 }
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253 }
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254
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255 istemp = 0;
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256 Lagain:
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257 //printf("Lagain: %s\n", toChars());
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258 f = null;
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259 if (e1.op == TOK.TOKthis || e1.op == TOK.TOKsuper)
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260 {
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261 // semantic() run later for these
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262 }
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263 else
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264 {
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265 UnaExp.semantic(sc);
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266
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267 /* Look for e1 being a lazy parameter
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268 */
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269 if (e1.op == TOK.TOKvar)
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270 {
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271 VarExp ve = cast(VarExp)e1;
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272
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273 if (ve.var.storage_class & STC.STClazy)
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274 {
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275 TypeFunction tff = new TypeFunction(null, ve.var.type, 0, LINK.LINKd);
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276 TypeDelegate t = new TypeDelegate(tff);
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277 ve.type = t.semantic(loc, sc);
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278 }
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279 }
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280
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281 if (e1.op == TOK.TOKimport)
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282 {
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283 // Perhaps this should be moved to ScopeExp.semantic()
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284 ScopeExp se = cast(ScopeExp)e1;
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285 e1 = new DsymbolExp(loc, se.sds);
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286 e1 = e1.semantic(sc);
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287 }
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288 ///static if (true) { // patch for #540 by Oskar Linde
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289 else if (e1.op == TOK.TOKdotexp)
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290 {
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291 DotExp de = cast(DotExp)e1;
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292
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293 if (de.e2.op == TOK.TOKimport)
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294 {
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295 // This should *really* be moved to ScopeExp.semantic()
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296 ScopeExp se = cast(ScopeExp)de.e2;
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297 de.e2 = new DsymbolExp(loc, se.sds);
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298 de.e2 = de.e2.semantic(sc);
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299 }
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300
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301 if (de.e2.op == TOK.TOKtemplate)
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302 {
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303 TemplateExp te = cast(TemplateExp)de.e2;
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304 e1 = new DotTemplateExp(loc,de.e1,te.td);
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305 }
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306 }
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307 ///}
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308 }
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309
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310 if (e1.op == TOK.TOKcomma)
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311 {
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312 CommaExp ce = cast(CommaExp)e1;
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313
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314 e1 = ce.e2;
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315 e1.type = ce.type;
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316 ce.e2 = this;
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317 ce.type = null;
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318 return ce.semantic(sc);
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319 }
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320
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321 t1 = null;
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322 if (e1.type)
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323 t1 = e1.type.toBasetype();
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324
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325 // Check for call operator overload
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326 if (t1)
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327 {
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328 AggregateDeclaration ad;
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329
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330 if (t1.ty == TY.Tstruct)
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331 {
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332 ad = (cast(TypeStruct)t1).sym;
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333 version (DMDV2) {
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334 // First look for constructor
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335 if (ad.ctor && arguments && arguments.dim)
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336 {
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337 // Create variable that will get constructed
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338 Identifier idtmp = Lexer.uniqueId("__ctmp");
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339 VarDeclaration tmp = new VarDeclaration(loc, t1, idtmp, null);
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340 Expression av = new DeclarationExp(loc, tmp);
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341 av = new CommaExp(loc, av, new VarExp(loc, tmp));
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342
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343 Expression e;
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344 CtorDeclaration cf = ad.ctor.isCtorDeclaration();
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345 if (cf)
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346 e = new DotVarExp(loc, av, cf, 1);
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347 else
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348 {
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349 TemplateDeclaration td = ad.ctor.isTemplateDeclaration();
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350 assert(td);
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351 e = new DotTemplateExp(loc, av, td);
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352 }
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353 e = new CallExp(loc, e, arguments);
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354 version (STRUCTTHISREF) {
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355 } else {
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356 /* Constructors return a pointer to the instance
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357 */
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358 e = new PtrExp(loc, e);
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359 }
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360 e = e.semantic(sc);
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361 return e;
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362 }
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363 }
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364 // No constructor, look for overload of opCall
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365 if (search_function(ad, Id.call))
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366 goto L1; // overload of opCall, therefore it's a call
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367
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368 if (e1.op != TOK.TOKtype)
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369 error("%s %s does not overload ()", ad.kind(), ad.toChars());
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370
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371 /* It's a struct literal
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372 */
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373 Expression e = new StructLiteralExp(loc, cast(StructDeclaration)ad, arguments);
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374 e = e.semantic(sc);
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375 e.type = e1.type; // in case e1.type was a typedef
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376 return e;
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377 }
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378 else if (t1.ty == TY.Tclass)
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379 {
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380 ad = (cast(TypeClass)t1).sym;
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381 goto L1;
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382 L1:
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383 // Rewrite as e1.call(arguments)
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384 Expression e = new DotIdExp(loc, e1, Id.call);
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385 e = new CallExp(loc, e, arguments);
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386 e = e.semantic(sc);
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387 return e;
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388 }
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389 }
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390
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391 arrayExpressionSemantic(arguments, sc);
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392 preFunctionArguments(loc, sc, arguments);
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393
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394 if (e1.op == TOK.TOKdotvar && t1.ty == TY.Tfunction ||
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395 e1.op == TOK.TOKdottd)
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396 {
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397 DotVarExp dve;
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398 DotTemplateExp dte;
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399 AggregateDeclaration ad;
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400 UnaExp ue = cast(UnaExp)e1;
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401
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402 if (e1.op == TOK.TOKdotvar)
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403 {
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404 // Do overload resolution
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405 dve = cast(DotVarExp)e1;
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406
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407 f = dve.var.isFuncDeclaration();
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408 assert(f);
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409 f = f.overloadResolve(loc, ue.e1, arguments);
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410
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411 ad = f.toParent().isAggregateDeclaration();
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412 }
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413 else
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414 {
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415 dte = cast(DotTemplateExp)e1;
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416 TemplateDeclaration td = dte.td;
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417 assert(td);
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418
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419 if (!arguments)
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420 // Should fix deduceFunctionTemplate() so it works on null argument
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421 arguments = new Expressions();
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422
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423 f = td.deduceFunctionTemplate(sc, loc, targsi, ue.e1, arguments);
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424 if (!f)
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425 {
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|
|
426 type = Type.terror;
|
|
|
427 return this;
|
|
|
428 }
|
|
|
429 ad = td.toParent().isAggregateDeclaration();
|
|
|
430 }
|
|
|
431
|
|
|
432 if (f.needThis())
|
|
|
433 {
|
|
|
434 ue.e1 = getRightThis(loc, sc, ad, ue.e1, f);
|
|
|
435 }
|
|
|
436
|
|
|
437 /* Cannot call public functions from inside invariant
|
|
|
438 * (because then the invariant would have infinite recursion)
|
|
|
439 */
|
|
|
440 if (sc.func && sc.func.isInvariantDeclaration() &&
|
|
|
441 ue.e1.op == TOK.TOKthis && f.addPostInvariant())
|
|
|
442 {
|
|
|
443 error("cannot call public/export function %s from invariant", f.toChars());
|
|
|
444 }
|
|
|
445
|
|
|
446 checkDeprecated(sc, f);
|
|
|
447 version (DMDV2) {
|
|
|
448 checkPurity(sc, f);
|
|
|
449 }
|
|
|
450 accessCheck(loc, sc, ue.e1, f);
|
|
|
451 if (!f.needThis())
|
|
|
452 {
|
|
|
453 VarExp ve = new VarExp(loc, f);
|
|
|
454 e1 = new CommaExp(loc, ue.e1, ve);
|
|
|
455 e1.type = f.type;
|
|
|
456 }
|
|
|
457 else
|
|
|
458 {
|
|
|
459 if (e1.op == TOK.TOKdotvar)
|
|
|
460 dve.var = f;
|
|
|
461 else
|
|
|
462 e1 = new DotVarExp(loc, dte.e1, f);
|
|
|
463
|
|
|
464 e1.type = f.type;
|
|
|
465 static if (false) {
|
|
|
466 printf("ue.e1 = %s\n", ue.e1.toChars());
|
|
|
467 printf("f = %s\n", f.toChars());
|
|
|
468 printf("t = %s\n", t.toChars());
|
|
|
469 printf("e1 = %s\n", e1.toChars());
|
|
|
470 printf("e1.type = %s\n", e1.type.toChars());
|
|
|
471 }
|
|
|
472 // Const member function can take const/immutable/mutable this
|
|
|
473 if (!(f.type.isConst()))
|
|
|
474 {
|
|
|
475 // Check for const/immutable compatibility
|
|
|
476 Type tthis = ue.e1.type.toBasetype();
|
|
|
477 if (tthis.ty == TY.Tpointer)
|
|
|
478 tthis = tthis.nextOf().toBasetype();
|
|
|
479
|
|
|
480 static if (false) { // this checking should have been already done
|
|
|
481 if (f.type.isInvariant())
|
|
|
482 {
|
|
|
483 if (tthis.mod != MOD.MODinvariant)
|
|
|
484 error("%s can only be called with an immutable object", e1.toChars());
|
|
|
485 }
|
|
|
486 else if (f.type.isShared())
|
|
|
487 {
|
|
|
488 if (tthis.mod != MOD.MODinvariant && tthis.mod != MOD.MODshared && tthis.mod != (MOD.MODshared | MOD.MODconst))
|
|
|
489 error("shared %s can only be called with a shared or immutable object", e1.toChars());
|
|
|
490 }
|
|
|
491 else
|
|
|
492 {
|
|
|
493 if (tthis.mod != MOD.MODundefined)
|
|
|
494 {
|
|
|
495 //printf("mod = %x\n", tthis.mod);
|
|
|
496 error("%s can only be called with a mutable object, not %s", e1.toChars(), tthis.toChars());
|
|
|
497 }
|
|
|
498 }
|
|
|
499 }
|
|
|
500 /* Cannot call mutable method on a final struct
|
|
|
501 */
|
|
|
502 if (tthis.ty == TY.Tstruct &&
|
|
|
503 ue.e1.op == TOK.TOKvar)
|
|
|
504 {
|
|
|
505 VarExp v = cast(VarExp)ue.e1;
|
|
|
506 if (v.var.storage_class & STC.STCfinal)
|
|
|
507 error("cannot call mutable method on final struct");
|
|
|
508 }
|
|
|
509 }
|
|
|
510
|
|
|
511 // See if we need to adjust the 'this' pointer
|
|
|
512 AggregateDeclaration add = f.isThis();
|
|
|
513 ClassDeclaration cd = ue.e1.type.isClassHandle();
|
|
|
514 if (add && cd && add.isClassDeclaration() && add != cd && ue.e1.op != TOK.TOKsuper)
|
|
|
515 {
|
|
|
516 ue.e1 = ue.e1.castTo(sc, add.type); //new CastExp(loc, ue.e1, add.type);
|
|
|
517 ue.e1 = ue.e1.semantic(sc);
|
|
|
518 }
|
|
|
519 }
|
|
|
520 t1 = e1.type;
|
|
|
521 }
|
|
|
522 else if (e1.op == TOK.TOKsuper)
|
|
|
523 {
|
|
|
524 // Base class constructor call
|
|
|
525 ClassDeclaration cd = null;
|
|
|
526
|
|
|
527 if (sc.func)
|
|
|
528 cd = sc.func.toParent().isClassDeclaration();
|
|
|
529 if (!cd || !cd.baseClass || !sc.func.isCtorDeclaration())
|
|
|
530 {
|
|
|
531 error("super class constructor call must be in a constructor");
|
|
|
532 type = Type.terror;
|
|
|
533 return this;
|
|
|
534 }
|
|
|
535 else
|
|
|
536 {
|
|
|
537 if (!cd.baseClass.ctor)
|
|
|
538 {
|
|
|
539 error("no super class constructor for %s", cd.baseClass.toChars());
|
|
|
540 type = Type.terror;
|
|
|
541 return this;
|
|
|
542 }
|
|
|
543 else
|
|
|
544 {
|
|
|
545 if (!sc.intypeof)
|
|
|
546 {
|
|
|
547 static if (false) {
|
|
|
548 if (sc.callSuper & (CSX.CSXthis | CSX.CSXsuper))
|
|
|
549 error("reference to this before super()");
|
|
|
550 }
|
|
|
551 if (sc.noctor || sc.callSuper & CSX.CSXlabel)
|
|
|
552 error("constructor calls not allowed in loops or after labels");
|
|
|
553 if (sc.callSuper & (CSX.CSXsuper_ctor | CSX.CSXthis_ctor))
|
|
|
554 error("multiple constructor calls");
|
|
|
555 sc.callSuper |= CSX.CSXany_ctor | CSX.CSXsuper_ctor;
|
|
|
556 }
|
|
|
557
|
|
|
558 f = resolveFuncCall(sc, loc, cd.baseClass.ctor, null, null, arguments, 0);
|
|
|
559 checkDeprecated(sc, f);
|
|
|
560 version (DMDV2) {
|
|
|
561 checkPurity(sc, f);
|
|
|
562 }
|
|
|
563 e1 = new DotVarExp(e1.loc, e1, f);
|
|
|
564 e1 = e1.semantic(sc);
|
|
|
565 t1 = e1.type;
|
|
|
566 }
|
|
|
567 }
|
|
|
568 }
|
|
|
569 else if (e1.op == TOK.TOKthis)
|
|
|
570 {
|
|
|
571 // same class constructor call
|
|
|
572 AggregateDeclaration cd = null;
|
|
|
573
|
|
|
574 if (sc.func)
|
|
|
575 cd = sc.func.toParent().isAggregateDeclaration();
|
|
|
576 if (!cd || !sc.func.isCtorDeclaration())
|
|
|
577 {
|
|
|
578 error("constructor call must be in a constructor");
|
|
|
579 type = Type.terror;
|
|
|
580 return this;
|
|
|
581 }
|
|
|
582 else
|
|
|
583 {
|
|
|
584 if (!sc.intypeof)
|
|
|
585 {
|
|
|
586 static if (false) {
|
|
|
587 if (sc.callSuper & (CSXthis | CSXsuper))
|
|
|
588 error("reference to this before super()");
|
|
|
589 }
|
|
|
590 if (sc.noctor || sc.callSuper & CSX.CSXlabel)
|
|
|
591 error("constructor calls not allowed in loops or after labels");
|
|
|
592 if (sc.callSuper & (CSX.CSXsuper_ctor | CSX.CSXthis_ctor))
|
|
|
593 error("multiple constructor calls");
|
|
|
594 sc.callSuper |= CSX.CSXany_ctor | CSX.CSXthis_ctor;
|
|
|
595 }
|
|
|
596
|
|
|
597 f = resolveFuncCall(sc, loc, cd.ctor, null, null, arguments, 0);
|
|
|
598 checkDeprecated(sc, f);
|
|
|
599 version (DMDV2) {
|
|
|
600 checkPurity(sc, f);
|
|
|
601 }
|
|
|
602 e1 = new DotVarExp(e1.loc, e1, f);
|
|
|
603 e1 = e1.semantic(sc);
|
|
|
604 t1 = e1.type;
|
|
|
605
|
|
|
606 // BUG: this should really be done by checking the static
|
|
|
607 // call graph
|
|
|
608 if (f == sc.func)
|
|
|
609 error("cyclic constructor call");
|
|
|
610 }
|
|
|
611 }
|
|
|
612 else if (e1.op == TOK.TOKoverloadset)
|
|
|
613 {
|
|
|
614 OverExp eo = cast(OverExp)e1;
|
|
|
615 FuncDeclaration ff = null;
|
|
|
616 for (int j = 0; j < eo.vars.a.dim; j++)
|
|
|
617 {
|
|
|
618 Dsymbol s = cast(Dsymbol)eo.vars.a.data[j];
|
|
|
619 FuncDeclaration f2 = s.isFuncDeclaration();
|
|
|
620 if (f2)
|
|
|
621 {
|
|
|
622 f2 = f2.overloadResolve(loc, null, arguments, 1);
|
|
|
623 }
|
|
|
624 else
|
|
|
625 {
|
|
|
626 TemplateDeclaration td = s.isTemplateDeclaration();
|
|
|
627 assert(td);
|
|
|
628 f2 = td.deduceFunctionTemplate(sc, loc, targsi, null, arguments, 1);
|
|
|
629 }
|
|
|
630 if (f2)
|
|
|
631 {
|
|
|
632 if (ff)
|
|
|
633 /* Error if match in more than one overload set,
|
|
|
634 * even if one is a 'better' match than the other.
|
|
|
635 */
|
|
|
636 ScopeDsymbol.multiplyDefined(loc, ff, f2);
|
|
|
637 else
|
|
|
638 ff = f2;
|
|
|
639 }
|
|
|
640 }
|
|
|
641 if (!ff)
|
|
|
642 {
|
|
|
643 /* No overload matches, just set ff and rely on error
|
|
|
644 * message being generated later.
|
|
|
645 */
|
|
|
646 ff = cast(FuncDeclaration)eo.vars.a.data[0];
|
|
|
647 }
|
|
|
648 e1 = new VarExp(loc, ff);
|
|
|
649 goto Lagain;
|
|
|
650 }
|
|
|
651 else if (!t1)
|
|
|
652 {
|
|
|
653 error("function expected before (), not '%s'", e1.toChars());
|
|
|
654 type = Type.terror;
|
|
|
655 return this;
|
|
|
656 }
|
|
|
657 else if (t1.ty != TY.Tfunction)
|
|
|
658 {
|
|
|
659 if (t1.ty == TY.Tdelegate)
|
|
|
660 {
|
|
|
661 TypeDelegate td = cast(TypeDelegate)t1;
|
|
|
662 assert(td.next.ty == TY.Tfunction);
|
|
|
663 tf = cast(TypeFunction)(td.next);
|
|
|
664 if (sc.func && sc.func.isPure() && !tf.ispure)
|
|
|
665 {
|
|
|
666 error("pure function '%s' cannot call impure delegate '%s'", sc.func.toChars(), e1.toChars());
|
|
|
667 }
|
|
|
668 goto Lcheckargs;
|
|
|
669 }
|
|
|
670 else if (t1.ty == TY.Tpointer && (cast(TypePointer)t1).next.ty == TY.Tfunction)
|
|
|
671 {
|
|
|
672 Expression e = new PtrExp(loc, e1);
|
|
|
673 t1 = (cast(TypePointer)t1).next;
|
|
|
674 if (sc.func && sc.func.isPure() && !(cast(TypeFunction)t1).ispure)
|
|
|
675 {
|
|
|
676 error("pure function '%s' cannot call impure function pointer '%s'", sc.func.toChars(), e1.toChars());
|
|
|
677 }
|
|
|
678 e.type = t1;
|
|
|
679 e1 = e;
|
|
|
680 }
|
|
|
681 else if (e1.op == TOK.TOKtemplate)
|
|
|
682 {
|
|
|
683 TemplateExp te = cast(TemplateExp)e1;
|
|
|
684 f = te.td.deduceFunctionTemplate(sc, loc, targsi, null, arguments);
|
|
|
685 if (!f)
|
|
|
686 {
|
|
|
687 if (tierror)
|
|
|
688 tierror.error("errors instantiating template"); // give better error message
|
|
|
689 type = Type.terror;
|
|
|
690 return this;
|
|
|
691 }
|
|
|
692 if (f.needThis() && hasThis(sc))
|
|
|
693 {
|
|
|
694 // Supply an implicit 'this', as in
|
|
|
695 // this.ident
|
|
|
696
|
|
|
697 e1 = new DotTemplateExp(loc, (new ThisExp(loc)).semantic(sc), te.td);
|
|
|
698 goto Lagain;
|
|
|
699 }
|
|
|
700
|
|
|
701 e1 = new VarExp(loc, f);
|
|
|
702 goto Lagain;
|
|
|
703 }
|
|
|
704 else
|
|
|
705 {
|
|
|
706 error("function expected before (), not %s of type %s", e1.toChars(), e1.type.toChars());
|
|
|
707 type = Type.terror;
|
|
|
708 return this;
|
|
|
709 }
|
|
|
710 }
|
|
|
711 else if (e1.op == TOK.TOKvar)
|
|
|
712 {
|
|
|
713 // Do overload resolution
|
|
|
714 VarExp ve = cast(VarExp)e1;
|
|
|
715
|
|
|
716 f = ve.var.isFuncDeclaration();
|
|
|
717 assert(f);
|
|
|
718
|
|
|
719 if (ve.hasOverloads)
|
|
|
720 f = f.overloadResolve(loc, null, arguments);
|
|
|
721
|
|
|
722 checkDeprecated(sc, f);
|
|
|
723 version (DMDV2) {
|
|
|
724 checkPurity(sc, f);
|
|
|
725 }
|
|
|
726
|
|
|
727 if (f.needThis() && hasThis(sc))
|
|
|
728 {
|
|
|
729 // Supply an implicit 'this', as in
|
|
|
730 // this.ident
|
|
|
731
|
|
|
732 e1 = new DotVarExp(loc, new ThisExp(loc), f);
|
|
|
733 goto Lagain;
|
|
|
734 }
|
|
|
735
|
|
|
736 accessCheck(loc, sc, null, f);
|
|
|
737
|
|
|
738 ve.var = f;
|
|
73
|
739 // ve.hasOverloads = false;
|
|
72
|
740 ve.type = f.type;
|
|
|
741 t1 = f.type;
|
|
|
742 }
|
|
|
743 assert(t1.ty == TY.Tfunction);
|
|
|
744 tf = cast(TypeFunction)t1;
|
|
|
745
|
|
|
746 Lcheckargs:
|
|
|
747 assert(tf.ty == TY.Tfunction);
|
|
|
748 type = tf.next;
|
|
|
749
|
|
|
750 if (!arguments)
|
|
|
751 arguments = new Expressions();
|
|
|
752
|
|
|
753 functionArguments(loc, sc, tf, arguments);
|
|
|
754
|
|
|
755 if (!type)
|
|
|
756 {
|
|
|
757 error("forward reference to inferred return type of function call %s", toChars());
|
|
|
758 type = Type.terror;
|
|
|
759 }
|
|
|
760
|
|
|
761 if (f && f.tintro)
|
|
|
762 {
|
|
|
763 Type t = type;
|
|
|
764 int offset = 0;
|
|
|
765 TypeFunction tff = cast(TypeFunction)f.tintro;
|
|
|
766
|
|
|
767 if (tff.next.isBaseOf(t, &offset) && offset)
|
|
|
768 {
|
|
|
769 type = tff.next;
|
|
|
770 return castTo(sc, t);
|
|
|
771 }
|
|
|
772 }
|
|
|
773
|
|
|
774 return this;
|
|
0
|
775 }
|
|
|
776
|
|
72
|
777 override Expression optimize(int result)
|
|
0
|
778 {
|
|
72
|
779 //printf("CallExp::optimize(result = %d) %s\n", result, toChars());
|
|
|
780 Expression e = this;
|
|
|
781
|
|
|
782 // Optimize parameters
|
|
|
783 if (arguments)
|
|
|
784 {
|
|
|
785 for (size_t i = 0; i < arguments.dim; i++)
|
|
|
786 {
|
|
|
787 Expression ee = cast(Expression)arguments.data[i];
|
|
|
788
|
|
|
789 ee = ee.optimize(WANT.WANTvalue);
|
|
|
790 arguments.data[i] = cast(void*)ee;
|
|
|
791 }
|
|
|
792 }
|
|
|
793
|
|
|
794 e1 = e1.optimize(result);
|
|
|
795 if (e1.op == TOK.TOKvar)
|
|
|
796 {
|
|
|
797 FuncDeclaration fd = (cast(VarExp)e1).var.isFuncDeclaration();
|
|
|
798 if (fd)
|
|
|
799 {
|
|
|
800 BUILTIN b = fd.isBuiltin();
|
|
|
801 if (b)
|
|
|
802 {
|
|
|
803 e = eval_builtin(b, arguments);
|
|
|
804 if (!e) // failed
|
|
|
805 e = this; // evaluate at runtime
|
|
|
806 }
|
|
|
807 else if (result & WANT.WANTinterpret)
|
|
|
808 {
|
|
|
809 Expression eresult = fd.interpret(null, arguments);
|
|
|
810 if (eresult && eresult !is EXP_VOID_INTERPRET)
|
|
|
811 e = eresult;
|
|
|
812 else
|
|
|
813 error("cannot evaluate %s at compile time", toChars());
|
|
|
814 }
|
|
|
815 }
|
|
|
816 }
|
|
|
817
|
|
0
|
818 return e;
|
|
|
819 }
|
|
|
820
|
|
72
|
821 override Expression interpret(InterState istate)
|
|
0
|
822 {
|
|
72
|
823 Expression e = EXP_CANT_INTERPRET;
|
|
|
824
|
|
|
825 version (LOG) {
|
|
|
826 printf("CallExp.interpret() %.*s\n", toChars());
|
|
|
827 }
|
|
|
828 if (e1.op == TOKdotvar)
|
|
|
829 {
|
|
|
830 Expression pthis = (cast(DotVarExp)e1).e1;
|
|
|
831 FuncDeclaration fd = (cast(DotVarExp)e1).var.isFuncDeclaration();
|
|
|
832 TypeFunction tf = fd ? cast(TypeFunction)fd.type : null;
|
|
|
833 if (tf)
|
|
|
834 {
|
|
|
835 // Member function call
|
|
|
836 if(pthis.op == TOKthis)
|
|
|
837 pthis = istate.localThis;
|
|
|
838 Expression eresult = fd.interpret(istate, arguments, pthis);
|
|
|
839 if (eresult)
|
|
|
840 e = eresult;
|
|
|
841 else if (fd.type.toBasetype().nextOf().ty == Tvoid && !global.errors)
|
|
|
842 e = EXP_VOID_INTERPRET;
|
|
|
843 else
|
|
|
844 error("cannot evaluate %s at compile time", toChars());
|
|
|
845 return e;
|
|
|
846 }
|
|
|
847 error("cannot evaluate %s at compile time", toChars());
|
|
|
848 return EXP_CANT_INTERPRET;
|
|
|
849 }
|
|
|
850 if (e1.op == TOKvar)
|
|
|
851 {
|
|
|
852 FuncDeclaration fd = (cast(VarExp)e1).var.isFuncDeclaration();
|
|
|
853 if (fd)
|
|
|
854 {
|
|
|
855 ///version (DMDV2) {
|
|
|
856 BUILTIN b = fd.isBuiltin();
|
|
|
857 if (b)
|
|
|
858 {
|
|
|
859 scope Expressions args = new Expressions();
|
|
|
860 args.setDim(arguments.dim);
|
|
|
861 for (size_t i = 0; i < args.dim; i++)
|
|
|
862 {
|
|
|
863 Expression earg = cast(Expression)arguments.data[i];
|
|
|
864 earg = earg.interpret(istate);
|
|
|
865 if (earg == EXP_CANT_INTERPRET)
|
|
|
866 return earg;
|
|
|
867 args.data[i] = cast(void*)earg;
|
|
|
868 }
|
|
|
869 e = eval_builtin(b, args);
|
|
|
870 if (!e)
|
|
|
871 e = EXP_CANT_INTERPRET;
|
|
|
872 }
|
|
|
873 else
|
|
|
874 ///}
|
|
|
875 // Inline .dup
|
|
|
876 if (fd.ident == Id.adDup && arguments && arguments.dim == 2)
|
|
|
877 {
|
|
|
878 e = cast(Expression)arguments.data[1];
|
|
|
879 e = e.interpret(istate);
|
|
|
880 if (e !is EXP_CANT_INTERPRET)
|
|
|
881 {
|
|
|
882 e = expType(type, e);
|
|
|
883 }
|
|
|
884 }
|
|
|
885 else
|
|
|
886 {
|
|
|
887 Expression eresult = fd.interpret(istate, arguments);
|
|
|
888 if (eresult)
|
|
|
889 e = eresult;
|
|
|
890 else if (fd.type.toBasetype().nextOf().ty == Tvoid && !global.errors)
|
|
|
891 e = EXP_VOID_INTERPRET;
|
|
|
892 else
|
|
|
893 error("cannot evaluate %s at compile time", toChars());
|
|
|
894 }
|
|
|
895 }
|
|
|
896 }
|
|
63
|
897 return e;
|
|
0
|
898 }
|
|
|
899
|
|
72
|
900 override bool checkSideEffect(int flag)
|
|
0
|
901 {
|
|
72
|
902 version (DMDV2) {
|
|
|
903 if (flag != 2)
|
|
|
904 return true;
|
|
|
905
|
|
|
906 if (e1.checkSideEffect(2))
|
|
|
907 return true;
|
|
|
908
|
|
|
909 /* If any of the arguments have side effects, this expression does
|
|
|
910 */
|
|
|
911 for (size_t i = 0; i < arguments.dim; i++)
|
|
|
912 {
|
|
|
913 Expression e = cast(Expression)arguments.data[i];
|
|
|
914
|
|
|
915 if (e.checkSideEffect(2))
|
|
|
916 return true;
|
|
|
917 }
|
|
|
918
|
|
|
919 /* If calling a function or delegate that is typed as pure,
|
|
|
920 * then this expression has no side effects.
|
|
|
921 */
|
|
|
922 Type t = e1.type.toBasetype();
|
|
|
923 if (t.ty == TY.Tfunction && (cast(TypeFunction)t).ispure)
|
|
|
924 return false;
|
|
|
925 if (t.ty == TY.Tdelegate && (cast(TypeFunction)(cast(TypeDelegate)t).next).ispure)
|
|
|
926 return false;
|
|
|
927 }
|
|
0
|
928 return true;
|
|
|
929 }
|
|
|
930
|
|
72
|
931 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
|
|
0
|
932 {
|
|
72
|
933 int i;
|
|
|
934 expToCBuffer(buf, hgs, e1, precedence[op]);
|
|
|
935 buf.writeByte('(');
|
|
|
936 argsToCBuffer(buf, arguments, hgs);
|
|
0
|
937 buf.writeByte(')');
|
|
|
938 }
|
|
|
939
|
|
72
|
940 override void dump(int indent)
|
|
0
|
941 {
|
|
|
942 assert(false);
|
|
|
943 }
|
|
|
944
|
|
72
|
945 override elem* toElem(IRState* irs)
|
|
0
|
946 {
|
|
72
|
947 //printf("CallExp::toElem('%s')\n", toChars());
|
|
|
948 assert(e1.type);
|
|
|
949 elem* ec;
|
|
|
950 int directcall;
|
|
|
951 FuncDeclaration fd;
|
|
|
952 Type t1 = e1.type.toBasetype();
|
|
|
953 Type ectype = t1;
|
|
|
954
|
|
|
955 elem* ehidden = irs.ehidden;
|
|
|
956 irs.ehidden = null;
|
|
|
957
|
|
|
958 directcall = 0;
|
|
|
959 fd = null;
|
|
|
960 if (e1.op == TOK.TOKdotvar && t1.ty != TY.Tdelegate)
|
|
|
961 {
|
|
|
962 DotVarExp dve = cast(DotVarExp)e1;
|
|
|
963
|
|
|
964 fd = dve.var.isFuncDeclaration();
|
|
|
965 Expression ex = dve.e1;
|
|
|
966 while (1)
|
|
|
967 {
|
|
|
968 switch (ex.op)
|
|
|
969 {
|
|
|
970 case TOK.TOKsuper: // super.member() calls directly
|
|
|
971 case TOK.TOKdottype: // type.member() calls directly
|
|
|
972 directcall = 1;
|
|
|
973 break;
|
|
|
974
|
|
|
975 case TOK.TOKcast:
|
|
|
976 ex = (cast(CastExp)ex).e1;
|
|
|
977 continue;
|
|
|
978
|
|
|
979 default:
|
|
|
980 //ex.dump(0);
|
|
|
981 break;
|
|
|
982 }
|
|
|
983 break;
|
|
|
984 }
|
|
|
985 ec = dve.e1.toElem(irs);
|
|
|
986 ectype = dve.e1.type.toBasetype();
|
|
|
987 }
|
|
|
988 else if (e1.op == TOK.TOKvar)
|
|
|
989 {
|
|
|
990 fd = (cast(VarExp)e1).var.isFuncDeclaration();
|
|
|
991
|
|
|
992 if (fd && fd.ident == Id.alloca && !fd.fbody && fd.linkage == LINK.LINKc && arguments && arguments.dim == 1)
|
|
|
993 {
|
|
|
994 Expression arg = cast(Expression)arguments.data[0];
|
|
|
995 arg = arg.optimize(WANT.WANTvalue);
|
|
|
996 if (arg.isConst() && arg.type.isintegral())
|
|
|
997 {
|
|
|
998 long sz = arg.toInteger();
|
|
|
999 if (sz > 0 && sz < 0x40000)
|
|
|
1000 {
|
|
|
1001 // It's an alloca(sz) of a fixed amount.
|
|
|
1002 // Replace with an array allocated on the stack
|
|
|
1003 // of the same size: char[sz] tmp;
|
|
|
1004
|
|
|
1005 Symbol* stmp;
|
|
|
1006 .type* t;
|
|
|
1007
|
|
|
1008 assert(!ehidden);
|
|
|
1009 t = type_allocn(TYM.TYarray, tschar);
|
|
|
1010 t.Tdim = cast(uint)sz;
|
|
|
1011 stmp = symbol_genauto(t);
|
|
|
1012 ec = el_ptr(stmp);
|
|
|
1013 el_setLoc(ec,loc);
|
|
|
1014 return ec;
|
|
|
1015 }
|
|
|
1016 }
|
|
|
1017 }
|
|
|
1018
|
|
|
1019 ec = e1.toElem(irs);
|
|
|
1020 }
|
|
|
1021 else
|
|
|
1022 {
|
|
|
1023 ec = e1.toElem(irs);
|
|
|
1024 }
|
|
|
1025 ec = callfunc(loc, irs, directcall, type, ec, ectype, fd, t1, ehidden, arguments);
|
|
|
1026 el_setLoc(ec,loc);
|
|
0
|
1027 return ec;
|
|
|
1028 }
|
|
|
1029
|
|
72
|
1030 override void scanForNestedRef(Scope sc)
|
|
0
|
1031 {
|
|
72
|
1032 //printf("CallExp.scanForNestedRef(Scope *sc): %s\n", toChars());
|
|
|
1033 e1.scanForNestedRef(sc);
|
|
64
|
1034 arrayExpressionScanForNestedRef(sc, arguments);
|
|
72
|
1035 }
|
|
0
|
1036
|
|
|
1037 version (DMDV2) {
|
|
72
|
1038 override int isLvalue()
|
|
0
|
1039 {
|
|
72
|
1040 // if (type.toBasetype().ty == Tstruct)
|
|
|
1041 // return 1;
|
|
|
1042 Type tb = e1.type.toBasetype();
|
|
|
1043 if (tb.ty == Tfunction && (cast(TypeFunction)tb).isref)
|
|
|
1044 return 1; // function returns a reference
|
|
0
|
1045 return 0;
|
|
|
1046 }
|
|
|
1047 }
|
|
72
|
1048 override Expression toLvalue(Scope sc, Expression e)
|
|
0
|
1049 {
|
|
72
|
1050 if (isLvalue())
|
|
|
1051 return this;
|
|
0
|
1052 return Expression.toLvalue(sc, e);
|
|
72
|
1053 }
|
|
0
|
1054
|
|
|
1055 version (DMDV2) {
|
|
72
|
1056 override bool canThrow()
|
|
0
|
1057 {
|
|
72
|
1058 //printf("CallExp::canThrow() %s\n", toChars());
|
|
|
1059 if (e1.canThrow())
|
|
|
1060 return true;
|
|
|
1061
|
|
|
1062 /* If any of the arguments can throw, then this expression can throw
|
|
|
1063 */
|
|
|
1064 for (size_t i = 0; i < arguments.dim; i++)
|
|
|
1065 {
|
|
|
1066 Expression e = cast(Expression)arguments.data[i];
|
|
|
1067
|
|
|
1068 if (e && e.canThrow())
|
|
|
1069 return true;
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 if (global.errors && !e1.type)
|
|
|
1073 return false; // error recovery
|
|
|
1074
|
|
|
1075 /* If calling a function or delegate that is typed as nothrow,
|
|
|
1076 * then this expression cannot throw.
|
|
|
1077 * Note that pure functions can throw.
|
|
|
1078 */
|
|
|
1079 Type t = e1.type.toBasetype();
|
|
|
1080 if (t.ty == TY.Tfunction && (cast(TypeFunction)t).isnothrow)
|
|
|
1081 return false;
|
|
|
1082 if (t.ty == TY.Tdelegate && (cast(TypeFunction)(cast(TypeDelegate)t).next).isnothrow)
|
|
|
1083 return false;
|
|
|
1084
|
|
0
|
1085 return true;
|
|
|
1086 }
|
|
|
1087 }
|
|
72
|
1088 override int inlineCost(InlineCostState* ics)
|
|
0
|
1089 {
|
|
|
1090 return 1 + e1.inlineCost(ics) + arrayInlineCost(ics, arguments);
|
|
|
1091 }
|
|
|
1092
|
|
72
|
1093 override Expression doInline(InlineDoState ids)
|
|
0
|
1094 {
|
|
72
|
1095 CallExp ce = cast(CallExp)copy();
|
|
|
1096 ce.e1 = e1.doInline(ids);
|
|
|
1097 ce.arguments = arrayExpressiondoInline(arguments, ids);
|
|
0
|
1098 return ce;
|
|
|
1099 }
|
|
|
1100
|
|
72
|
1101 override Expression inlineScan(InlineScanState* iss)
|
|
0
|
1102 {
|
|
72
|
1103 Expression e = this;
|
|
|
1104
|
|
|
1105 //printf("CallExp.inlineScan()\n");
|
|
|
1106 e1 = e1.inlineScan(iss);
|
|
|
1107 arrayInlineScan(iss, arguments);
|
|
|
1108
|
|
|
1109 if (e1.op == TOKvar)
|
|
|
1110 {
|
|
|
1111 VarExp ve = cast(VarExp)e1;
|
|
|
1112 FuncDeclaration fd = ve.var.isFuncDeclaration();
|
|
|
1113
|
|
|
1114 if (fd && fd != iss.fd && fd.canInline(0))
|
|
|
1115 {
|
|
|
1116 e = fd.doInline(iss, null, arguments);
|
|
|
1117 }
|
|
|
1118 }
|
|
|
1119 else if (e1.op == TOKdotvar)
|
|
|
1120 {
|
|
|
1121 DotVarExp dve = cast(DotVarExp)e1;
|
|
|
1122 FuncDeclaration fd = dve.var.isFuncDeclaration();
|
|
|
1123
|
|
|
1124 if (fd && fd != iss.fd && fd.canInline(1))
|
|
|
1125 {
|
|
|
1126 if (dve.e1.op == TOKcall &&
|
|
|
1127 dve.e1.type.toBasetype().ty == Tstruct)
|
|
|
1128 {
|
|
|
1129 /* To create ethis, we'll need to take the address
|
|
|
1130 * of dve.e1, but this won't work if dve.e1 is
|
|
|
1131 * a function call.
|
|
|
1132 */
|
|
|
1133 ;
|
|
|
1134 }
|
|
|
1135 else
|
|
|
1136 e = fd.doInline(iss, dve.e1, arguments);
|
|
|
1137 }
|
|
|
1138 }
|
|
|
1139
|
|
0
|
1140 return e;
|
|
|
1141 }
|
|
|
1142 }
|
|
|
1143
|
