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annotate sema/TypeCheck.d @ 126:c3b24e7e8cf8

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Carius changes to the parser. Parsing attributes, lexing many keywords(not all yet).
author Anders Johnsen <skabet@gmail.com>
date Tue, 27 May 2008 10:32:31 +0200
parents 3a0cd42de9cc
children 57b0b4464a0b
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rev   line source
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771ac63898e2 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.DType;
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5
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6 import tango.io.Stdout;
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7
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8 import basic.SourceLocation,
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9 basic.Message;
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10
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771ac63898e2 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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11 class TypeCheck : Visitor!(void)
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12 {
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13 this(MessageHandler messages)
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14 {
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15 this.messages = messages;
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16 }
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17
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18 override void visitBinaryExp(BinaryExp exp)
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19 {
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20 super.visitBinaryExp(exp);
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21
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22 if(!(exp.left.type is exp.right.type))
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23 {
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24 if (!exp.right.type.hasImplicitConversionTo(exp.left.type) &&
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25 !exp.left.type.hasImplicitConversionTo(exp.right.type))
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26 messages.report(InvalidImplicitCast, exp.loc)
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27 .arg(exp.right.type.toString)
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28 .arg(exp.left.type.toString);
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29 else
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30 {
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31 CastExp castExp;
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32 if(exp.left.type.isReal && exp.right.type.isReal)
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33 if(exp.left.type.byteSize > exp.right.type.byteSize)
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34 castExp = new CastExp(
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35 SLoc.Invalid,
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36 new Identifier(exp.left.type.name),
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37 exp.right);
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38 else
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39 castExp = new CastExp(
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40 SLoc.Invalid,
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41 new Identifier(exp.right.type.name),
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42 exp.left);
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43 else if(exp.left.type.isReal || exp.right.type.isReal)
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44 if(exp.left.type.isReal)
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45 castExp = new CastExp(
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46 SLoc.Invalid,
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47 new Identifier(exp.left.type.name),
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48 exp.right);
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49 else
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50 castExp = new CastExp(
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51 SLoc.Invalid,
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52 new Identifier(exp.right.type.name),
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53 exp.left);
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54 else
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55 if(exp.left.type.byteSize > exp.right.type.byteSize)
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56 castExp = new CastExp(
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57 SLoc.Invalid,
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58 new Identifier(exp.left.type.name),
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59 exp.right);
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60 else if(exp.left.type.byteSize > exp.right.type.byteSize)
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61 castExp = new CastExp(
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62 SLoc.Invalid,
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63 new Identifier(exp.right.type.name),
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64 exp.left);
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65 else
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66 castExp = new CastExp(
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67 SLoc.Invalid,
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68 new Identifier(exp.left.type.name),
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69 exp.right);
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71
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72 if(castExp)
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73 {
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74 castExp.env = exp.env;
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75 if(castExp.exp == exp.right)
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76 exp.right = castExp;
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77 else
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78 exp.left = castExp;
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79
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80 }
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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 override void visitCallExp(CallExp exp)
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86 {
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87 super.visitCallExp(exp);
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88
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89 Exp[] newArgs;
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90
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91 foreach(i, arg; exp.args)
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92 {
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93 auto argType = (cast(DFunction)exp.exp.type).params[i];
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94 auto expType = arg.type;
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95 if(argType.byteSize != expType.byteSize)
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96 {
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97 if(!expType.hasImplicitConversionTo(argType))
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98 messages.report(InvalidImplicitCast, exp.loc)
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99 .arg(expType.toString)
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100 .arg(argType.toString);
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101
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102 auto castExp = new CastExp(
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103 SLoc.Invalid,
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104 new Identifier(argType.name),
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105 arg);
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106 castExp.env = exp.exp.env;
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107 newArgs ~= castExp;
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108 }
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109 else
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110 newArgs ~= arg;
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111 }
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112
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113 exp.args = newArgs;
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114 }
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115
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116 override void visitAssignExp(AssignExp exp)
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117 {
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118 super.visitAssignExp(exp);
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119
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120 auto identifierType = exp.identifier.type;
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121 auto expType = exp.exp.type;
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122
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123 if(identifierType != expType)
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124 {
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125 if(!expType.hasImplicitConversionTo(identifierType))
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126 messages.report(InvalidImplicitCast, exp.loc)
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127 .arg(expType.toString)
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128 .arg(identifierType.toString);
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129
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130 auto castExp = new CastExp(
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131 SLoc.Invalid,
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132 new Identifier(identifierType.name),
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133 exp.exp);
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134 castExp.env = exp.exp.env;
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135 exp.exp = castExp;
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136 }
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137 }
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138
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139 override void visitReturnStmt(ReturnStmt stmt)
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140 {
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141 super.visitReturnStmt(stmt);
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142
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143 if(stmt.exp)
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144 {
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145 auto returnType = stmt.env.parentFunction.type.asFunction.returnType;
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146 auto expType = stmt.exp.type;
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147 if(returnType != expType)
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148 {
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149 if(!expType.hasImplicitConversionTo(returnType))
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150 messages.report(InvalidImplicitCast, stmt.exp.loc)
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151 .arg(expType.toString)
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152 .arg(returnType.toString);
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153
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154 auto castExp = new CastExp(
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155 SLoc.Invalid,
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156 new Identifier(returnType.name),
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157 stmt.exp);
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158 castExp.env = stmt.exp.env;
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159 stmt.exp = castExp;
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160 }
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161 }
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162 }
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163
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164 override void visitVarDecl(VarDecl decl)
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165 {
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166 super.visitVarDecl(decl);
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167
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168 if(decl.init)
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169 {
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170 auto varType = decl.type;
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171 auto expType = decl.init.type;
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172 if(varType.byteSize != expType.byteSize)
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173 {
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174 if(!expType.hasImplicitConversionTo(varType))
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175 messages.report(InvalidImplicitCast, decl.init.loc)
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176 .arg(expType.toString)
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177 .arg(varType.toString);
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178
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179 auto castExp = new CastExp(
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180 SLoc.Invalid,
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181 new Identifier(varType.name),
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182 decl.init);
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183 castExp.env = decl.init.env;
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184 decl.init = castExp;
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185 }
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186 }
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187 }
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188
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189 MessageHandler messages;
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190 }
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191