Mercurial > projects > dang
annotate sema/TypeCheck.d @ 165:7606387b2f0a
Better handling of param checking on method calls.
author | Anders Johnsen <skabet@gmail.com> |
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date | Tue, 22 Jul 2008 18:24:15 +0200 |
parents | ba94fd563548 |
children | 7982eb63c0eb |
rev | line source |
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92
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A few better parser errors plus renaming most of the sema classes to match that they do now. Some have changes a lot.
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1 module sema.TypeCheck; |
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2 |
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3 import sema.Visitor, |
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4 sema.Symbol, |
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5 sema.DType; |
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6 |
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7 import tango.io.Stdout, |
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8 Integer = tango.text.convert.Integer; |
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9 |
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10 import basic.SourceLocation, |
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11 basic.Message; |
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12 |
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A few better parser errors plus renaming most of the sema classes to match that they do now. Some have changes a lot.
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13 class TypeCheck : Visitor!(void) |
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14 { |
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15 this(MessageHandler messages) |
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16 { |
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17 this.messages = messages; |
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18 } |
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19 |
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20 override void visitBinaryExp(BinaryExp exp) |
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21 { |
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22 super.visitBinaryExp(exp); |
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23 |
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24 if(!(exp.left.type is exp.right.type)) |
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25 { |
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26 if (!exp.right.type.hasImplicitConversionTo(exp.left.type) && |
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27 !exp.left.type.hasImplicitConversionTo(exp.right.type)) |
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28 messages.report(InvalidImplicitCast, exp.loc) |
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29 .arg(exp.right.type.toString) |
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30 .arg(exp.left.type.toString); |
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31 else |
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32 { |
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33 CastExp castExp; |
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34 if(exp.left.type.isReal && exp.right.type.isReal) |
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35 if(exp.left.type.byteSize > exp.right.type.byteSize) |
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36 castExp = new CastExp( |
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37 SLoc.Invalid, |
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38 new Identifier(exp.left.type.name), |
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39 exp.right); |
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40 else |
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41 castExp = new CastExp( |
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42 SLoc.Invalid, |
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43 new Identifier(exp.right.type.name), |
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44 exp.left); |
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45 else if(exp.left.type.isReal || exp.right.type.isReal) |
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46 if(exp.left.type.isReal) |
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47 castExp = new CastExp( |
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48 SLoc.Invalid, |
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49 new Identifier(exp.left.type.name), |
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50 exp.right); |
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51 else |
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52 castExp = new CastExp( |
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53 SLoc.Invalid, |
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54 new Identifier(exp.right.type.name), |
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55 exp.left); |
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56 else |
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57 if(exp.left.type.byteSize > exp.right.type.byteSize) |
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58 castExp = new CastExp( |
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59 SLoc.Invalid, |
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60 new Identifier(exp.left.type.name), |
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61 exp.right); |
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62 else if(exp.left.type.byteSize > exp.right.type.byteSize) |
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63 castExp = new CastExp( |
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64 SLoc.Invalid, |
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65 new Identifier(exp.right.type.name), |
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66 exp.left); |
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67 else |
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68 castExp = new CastExp( |
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69 SLoc.Invalid, |
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70 new Identifier(exp.left.type.name), |
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71 exp.right); |
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72 |
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73 |
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74 if(castExp) |
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75 { |
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76 castExp.env = exp.env; |
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77 if(castExp.exp == exp.right) |
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78 exp.right = castExp; |
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79 else |
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80 exp.left = castExp; |
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81 |
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82 } |
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83 } |
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84 } |
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85 } |
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86 |
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87 override void visitCallExp(CallExp exp) |
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88 { |
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89 super.visitCallExp(exp); |
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90 |
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91 Exp[] newArgs; |
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92 |
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93 foreach(i, arg; exp.args) |
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94 { |
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95 auto argType = exp.exp.type.asFunction.params[i]; |
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96 auto expType = arg.type; |
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97 if(argType.byteSize != expType.byteSize) |
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98 { |
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99 if(!expType.hasImplicitConversionTo(argType)) |
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100 messages.report(InvalidImplicitCast, exp.loc) |
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101 .arg(expType.toString) |
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102 .arg(argType.toString); |
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103 |
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104 auto castExp = new CastExp( |
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105 SLoc.Invalid, |
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106 new Identifier(argType.name), |
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107 arg); |
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108 castExp.env = exp.exp.env; |
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109 newArgs ~= castExp; |
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110 } |
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111 else |
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112 newArgs ~= arg; |
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113 } |
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114 |
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115 exp.args = newArgs; |
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116 } |
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117 |
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118 override void visitNewExp(NewExp exp) |
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119 { |
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120 super.visitNewExp(exp); |
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121 |
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122 Exp[] newArgs; |
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123 |
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124 Symbol[] methods = exp.newType.getSymbol.findMembers("this"); |
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125 |
165
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126 if (!methods.length) |
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127 { |
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128 messages.report(NoConstructor, exp.newType.loc); |
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129 return; |
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130 } |
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131 |
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132 Symbol sel = getBestMatch(exp.c_args, methods); |
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133 |
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134 if (sel) |
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135 { |
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136 foreach (i, arg; exp.c_args) |
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137 { |
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138 auto argType = sel.type.asFunction.params[i]; |
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139 auto expType = arg.type; |
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140 if (argType.byteSize != expType.byteSize) |
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141 { |
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142 if (!expType.hasImplicitConversionTo(argType)) |
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143 messages.report(InvalidImplicitCast, exp.loc) |
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144 .arg(expType.toString) |
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145 .arg(argType.toString); |
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146 |
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147 auto castExp = new CastExp( |
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148 SLoc.Invalid, |
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149 new Identifier(argType.name), |
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150 arg); |
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151 castExp.env = exp.newType.env; |
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152 newArgs ~= castExp; |
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153 } |
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154 else |
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155 newArgs ~= arg; |
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156 } |
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157 exp.c_args = newArgs; |
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158 exp.callSym = sel; |
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159 } |
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160 else |
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161 { |
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162 messages.report(NoMachingCon, exp.newType.loc); |
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163 foreach ( i, s ; methods ) |
158
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164 { |
165
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165 messages.report(CandidateNr, |
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166 (cast(FuncDecl)s.decl).identifier.loc) |
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167 .arg(Integer.toString(i+1)); |
158
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168 } |
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169 } |
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170 } |
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171 |
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172 override void visitAssignExp(AssignExp exp) |
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173 { |
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174 super.visitAssignExp(exp); |
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175 |
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176 auto identifierType = exp.identifier.type; |
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177 auto expType = exp.exp.type; |
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178 |
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179 if(identifierType != expType) |
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180 { |
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181 if(!expType.hasImplicitConversionTo(identifierType)) |
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182 messages.report(InvalidImplicitCast, exp.loc) |
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183 .arg(expType.toString) |
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184 .arg(identifierType.toString); |
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185 |
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186 auto castExp = new CastExp( |
88
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187 SLoc.Invalid, |
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188 new Identifier(identifierType.name), |
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189 exp.exp); |
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190 castExp.env = exp.exp.env; |
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191 exp.exp = castExp; |
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192 } |
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193 } |
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194 |
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195 override void visitReturnStmt(ReturnStmt stmt) |
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196 { |
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197 super.visitReturnStmt(stmt); |
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198 |
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199 if(stmt.exp) |
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200 { |
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201 auto returnType = stmt.env.parentFunction.type.asFunction.returnType; |
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202 auto expType = stmt.exp.type; |
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203 if(returnType != expType) |
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204 { |
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205 if(!expType.hasImplicitConversionTo(returnType)) |
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206 messages.report(InvalidImplicitCast, stmt.exp.loc) |
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207 .arg(expType.toString) |
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208 .arg(returnType.toString); |
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209 |
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210 auto castExp = new CastExp( |
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211 SLoc.Invalid, |
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212 new Identifier(returnType.name), |
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213 stmt.exp); |
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214 castExp.env = stmt.exp.env; |
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215 stmt.exp = castExp; |
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216 } |
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217 } |
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218 } |
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219 |
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220 override void visitVarDecl(VarDecl decl) |
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221 { |
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222 super.visitVarDecl(decl); |
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223 |
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224 if(decl.init) |
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225 { |
160 | 226 auto varType = decl.identifier.type; |
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227 auto expType = decl.init.type; |
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228 if(varType.byteSize != expType.byteSize) |
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229 { |
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230 if(!expType.hasImplicitConversionTo(varType)) |
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231 messages.report(InvalidImplicitCast, decl.init.loc) |
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232 .arg(expType.toString) |
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233 .arg(varType.toString); |
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234 |
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235 auto castExp = new CastExp( |
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236 SLoc.Invalid, |
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237 new Identifier(varType.name), |
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238 decl.init); |
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239 castExp.env = decl.init.env; |
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240 decl.init = castExp; |
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241 } |
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242 } |
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243 } |
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244 |
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245 private Symbol getBestMatch(Exp[] arg_list , Symbol[] available) |
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246 body |
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247 { |
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248 Symbol[] _a; |
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249 foreach (a ; available) |
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250 if (a.type.isFunction) |
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251 _a ~= a; |
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252 available = _a; |
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253 |
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254 assert(available.length, "No available methods in symbol-list."); |
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255 |
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256 Symbol[] possible; |
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257 Symbol perfect; |
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258 |
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259 foreach (s ; available) |
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260 { |
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261 if (s.type.asFunction.params.length < arg_list.length) |
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262 continue; |
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263 |
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264 bool per = true; |
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265 |
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266 foreach (i, arg; arg_list) |
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267 { |
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268 auto argType = s.type.asFunction.params[i]; |
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269 auto expType = arg.type; |
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270 if (argType != expType) |
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271 { |
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272 per = false; |
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273 if( !expType.hasImplicitConversionTo(argType) ) |
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274 break; |
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275 } |
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276 |
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277 if (i == arg_list.length-1) |
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278 { |
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279 bool work = true; |
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280 foreach (a ; (cast(FuncDecl)s.decl).funcArgs[i+1..$]) |
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281 if (a.init is null) |
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282 work = false; |
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283 |
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284 if (work) |
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285 if (per) |
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286 return s; |
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287 else |
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288 possible ~= s; |
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289 } |
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290 } |
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291 } |
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292 |
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293 if (possible.length) |
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294 return possible[0]; |
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295 |
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296 return null; |
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297 } |
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298 |
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299 MessageHandler messages; |
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300 } |
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301 |