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annotate ast/Exp.d @ 83:9e90694f5da0 new_gen

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Parse array indexing, and allow reading from arrays
author Anders Halager <halager@gmail.com>
date Fri, 02 May 2008 19:54:22 +0200
parents 110c7e1c4ca2
children 9375bd975730
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1 module ast.Exp;
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3 import tango.text.Util;
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4 import tango.io.Stdout;
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6 import ast.Decl,
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7 ast.Stmt;
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8
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9 import lexer.Token;
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11 import sema.SymbolTable,
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12 sema.DType;
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13
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14 enum ExpType
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15 {
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16 Binary,
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17 Negate,
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18 Deref,
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19 IntegerLit,
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20 MemberReference,
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21 Index,
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22 Identifier,
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23 ArrayIdentifier,
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24 PointerIdentifier,
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25 AssignExp,
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26 CallExp,
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27 CastExp,
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28 }
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29
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30 class Exp
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31 {
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32 this(ExpType expType)
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33 {
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34 this.expType = expType;
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35 }
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36
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37 DType type() { return null; }
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38
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39 ExpType expType;
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40 Scope env;
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41 int stmtIndex;
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43 Exp simplify()
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44 {
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45 return this;
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46 }
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47 }
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48
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49 class CallExp : Exp
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50 {
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51 this(Exp exp, Exp[] args)
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52 {
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53 super(ExpType.CallExp);
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54 this.exp = exp;
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55 this.args = args;
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56 }
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58 override DType type()
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59 {
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60 DFunction f = cast(DFunction)exp.type();
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61 assert(f !is null, "Can only call functions");
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62 return f.returnType;
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63 }
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65 Exp exp;
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66 Exp[] args;
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67 bool sret = false;
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70 Exp simplify()
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71 {
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72 if(auto t = cast(DStruct)type)
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73 {
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74 DFunction func_t = cast(DFunction)exp.type();
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75 assert(func_t !is null, "Calling on something that isn't a function");
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76 if (cast(DStruct)func_t.returnType is null)
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77 return this;
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79 auto call = cast(Identifier)exp;
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80 FuncDecl f = env.parentFunction;
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81 auto i = new Identifier("temp.var");
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82 i.env = f.env;
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83 f.env.add(i);
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84 f.env.find(i).type = t;
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85 auto ty = new Identifier(t.name);
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86 auto var = new VarDecl(ty, i, null);
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87 Exp[] args;
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88 args ~= i;
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89 args ~= this.args;
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90 auto callExp = new CallExp(exp, args);
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91 callExp.env = f.env;
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92 var.env = f.env;
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93 auto stmtVar = new DeclStmt(var);
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94 auto stmtCall = new ExpStmt(callExp);
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95 Stmt[] stmts;
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96 foreach( index, s ; f.statements)
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97 {
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98 if(stmtIndex == index)
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99 {
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100 stmts ~= stmtVar;
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101 stmts ~= stmtCall;
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102 }
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103 stmts ~= s;
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104 }
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105 f.statements = stmts;
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106 callExp.sret = true;
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107
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108 return i;
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109 }
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110 return this;
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111 }
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112 }
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113
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114 class AssignExp : Exp
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115 {
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116 this(Exp identifier, Exp exp)
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117 {
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118 super(ExpType.AssignExp);
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119 this.identifier = identifier;
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120 this.exp = exp;
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121 }
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122 Exp simplify()
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123 {
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124 identifier = identifier.simplify;
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125 exp = exp.simplify;
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127 return this;
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128 }
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129
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130 override DType type() { return identifier.type(); }
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131
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132 Exp identifier;
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133 Exp exp;
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134 }
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135
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136 class BinaryExp : Exp
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137 {
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138 public enum Operator
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139 {
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140 Assign,
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141
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142 Eq, Ne,
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143
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144 Lt, Le,
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145 Gt, Ge,
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146
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147 Add, Sub,
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148 Mul, Div, Mod,
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149 }
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150
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151 char[][] getOp = ["=","==","!=","<","<=",">",">=","+","-","*","/","%"];
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152
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153 this(Operator op, Exp left, Exp right)
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154 {
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155 super(ExpType.Binary);
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156 this.op = op;
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157 this.left = left;
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158 this.right = right;
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159 }
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160
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161 override DType type()
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162 {
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163 if (myType)
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164 return myType;
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165
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166 if (op == Operator.Eq ||
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167 op == Operator.Ne ||
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168 op == Operator.Lt ||
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169 op == Operator.Le ||
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170 op == Operator.Gt ||
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171 op == Operator.Ge)
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172 {
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173 myType = DType.Bool;
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174 return myType;
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175 }
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176
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177 DType l = left.type;
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178 DType r = right.type;
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179 if (l is r)
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180 myType = l;
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181 else if (l.hasImplicitConversionTo(r))
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182 myType = r;
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183 else if (r.hasImplicitConversionTo(l))
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184 myType = l;
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185 else
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186 return null;
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187 return myType;
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188 }
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189
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190 char[] resultType()
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191 {
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192 if (op >= Operator.Eq && op <= Operator.Ge)
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193 return "bool";
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194 return null;
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195 }
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196 Exp simplify()
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197 {
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198 left = left.simplify;
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199 right = right.simplify;
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200 return this;
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201 }
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202
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203 Operator op;
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204 Exp left, right;
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205 private DType myType;
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206 }
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207
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208 class NegateExp : Exp
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209 {
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210 this(Exp exp)
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211 {
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212 super(ExpType.Negate);
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213 this.exp = exp;
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214 }
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215
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216 Exp simplify()
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217 {
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218 exp = exp.simplify;
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219 return this;
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220 }
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221
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222 override DType type() { return exp.type(); }
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223
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224 public Exp exp;
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225 }
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226
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227 class DerefExp : Exp
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228 {
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229 this(Exp exp)
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230 {
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231 super(ExpType.Deref);
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232 this.exp = exp;
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233 }
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234
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235 Exp simplify()
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236 {
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237 exp = exp.simplify;
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238 return this;
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239 }
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240
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241 override DType type()
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242 {
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243 return exp.type().asPointer.pointerOf;
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244 }
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245
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246 public Exp exp;
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247 }
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248
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249 class IntegerLit : Exp
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250 {
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251 this(Token t)
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252 {
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253 super(ExpType.IntegerLit);
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254 this.token = t;
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255 this.name = substitute(t.get,"_","");
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256 }
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257
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258 char[] get()
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259 {
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260 return name;
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261 }
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262 Exp simplify()
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263 {
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264 return this;
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265 }
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266
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267 override DType type() { return DType.Int; }
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268
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269
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270
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271 Token token;
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272 char[] name;
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273 }
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274
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275 class MemberReference : Exp
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276 {
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277 this(Exp target, Identifier child)
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278 {
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279 super(ExpType.MemberReference);
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280 this.target = target;
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281 this.child = child;
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282 }
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283 Exp simplify()
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284 {
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285 target = target.simplify;
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286 return this;
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287 }
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288
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289 override DType type()
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290 {
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291 if (myType)
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292 return myType;
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293
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294 DStruct st = cast(DStruct)target.type;
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295 assert(st, "Only structs have members");
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296 if (auto t = st.typeOf(child.token.get))
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297 myType = t;
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298 // no error reporting here
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299 else assert(0, "Referencing non-existant member");
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300
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301 return myType;
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302 }
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303
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304 Identifier child;
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305 Exp target;
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306 private DType myType;
28
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307 }
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308
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309 class IndexExp : Exp
28
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310 {
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311 this(Exp target, Exp index)
28
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312 {
83
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313 super(ExpType.Index);
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314 this.target = target;
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315 this.index = index;
28
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316 }
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317
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318 override DType type()
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319 {
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320 assert(target.type().isArray(), "Can only index arrays");
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321 DArray array = target.type().asArray();
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322 return array.arrayOf;
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323 }
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324
56
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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325 Exp simplify()
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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326 {
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
Anders Johnsen <skabet@gmail.com>
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327 target = target.simplify;
83
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328 index = index.simplify;
56
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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329 return this;
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330 }
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331
28
69464d465284 Now supporting structs - both read and write. Still a few errors though, so watch out.
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332 Exp target;
83
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333 Exp index;
28
69464d465284 Now supporting structs - both read and write. Still a few errors though, so watch out.
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parents: 10
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334 }
69464d465284 Now supporting structs - both read and write. Still a few errors though, so watch out.
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335
68
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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336 class CastExp : Exp
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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337 {
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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338 this(Identifier castType, Exp exp)
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
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339 {
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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340 super(ExpType.CastExp);
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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341 this.castType = castType;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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diff changeset
342 this.exp = exp;
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Anders Johnsen <skabet@gmail.com>
parents: 67
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343 }
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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344
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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345 override DType type()
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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346 {
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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347 return env.findType(this.castType);
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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348 }
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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parents: 67
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349
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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350 Exp simplify()
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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351 {
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
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352 castType.simplify;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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353 exp.simplify;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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354 return this;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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355 }
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
diff changeset
356
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
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357 Identifier castType;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 67
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358 Exp exp;
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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parents: 67
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359 }
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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parents: 67
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360
77
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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361 class PointerIdentifier : Identifier
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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362 {
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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363 this(Identifier pointerOf)
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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364 {
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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365 super(ExpType.PointerIdentifier);
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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366 this.pointerOf = pointerOf;
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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367 this.name = pointerOf.name;
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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368 }
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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369
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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370 override DType type()
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371 {
83
9e90694f5da0 Parse array indexing, and allow reading from arrays
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372 return pointerOf.type.getPointerTo();
77
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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373 }
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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374
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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375 Identifier pointerOf;
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
Anders Johnsen <skabet@gmail.com>
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376 }
13eea2c4e60d Now able of --ast-dump-code with Pointer types and also codeGen int* x;
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377
72
628cb46ab13b First update on the way to Arrays! :)
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378 class ArrayIdentifier : Identifier
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379 {
81
110c7e1c4ca2 Now you can declare array
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380 this(Identifier arrayOf, IntegerLit size)
72
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381 {
628cb46ab13b First update on the way to Arrays! :)
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382 super(ExpType.ArrayIdentifier);
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383 this.arrayOf = arrayOf;
81
110c7e1c4ca2 Now you can declare array
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384 this.size = Integer.parse(size.get);
110c7e1c4ca2 Now you can declare array
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385 this.name = arrayOf.name;
72
628cb46ab13b First update on the way to Arrays! :)
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386 }
628cb46ab13b First update on the way to Arrays! :)
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387
628cb46ab13b First update on the way to Arrays! :)
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388 override DType type()
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389 {
81
110c7e1c4ca2 Now you can declare array
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390 return arrayOf.type.getAsArray(size);
72
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391 }
628cb46ab13b First update on the way to Arrays! :)
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392
628cb46ab13b First update on the way to Arrays! :)
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393 Identifier arrayOf;
81
110c7e1c4ca2 Now you can declare array
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394 int size;
72
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395
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396 private DType myType;
628cb46ab13b First update on the way to Arrays! :)
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397 }
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398
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399 class Identifier : Exp
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400 {
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401 this(Token t)
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402 {
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403 super(ExpType.Identifier);
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404 this.token = t;
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405 name = t.get;
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406 }
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407
72
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408 protected this(ExpType t)
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409 {
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410 super(t);
628cb46ab13b First update on the way to Arrays! :)
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411 }
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412
58
fc62c5296a1c Add types to our Exp
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413 override DType type()
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414 {
59
1d6f4ad38a91 Make most of the tests pass again
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415 if (myType !is null)
58
fc62c5296a1c Add types to our Exp
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416 return myType;
fc62c5296a1c Add types to our Exp
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417 myType = env.find(this).type;
fc62c5296a1c Add types to our Exp
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418 return myType;
fc62c5296a1c Add types to our Exp
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419 }
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diff changeset
420
56
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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421 this(char[] name)
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422 {
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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423 super(ExpType.Identifier);
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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424 this.name = name;
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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425 }
4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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426
1
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427 char[] get()
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428 {
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429 return name;
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430 }
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431
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432 hash_t toHash()
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433 {
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434 return jhash(name);
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435 }
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436
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437 int opCmp(Object o)
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438 {
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439 if (auto id = cast(Identifier)o)
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440 return typeid(char[]).compare(&name, &id.name);
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441 return 0;
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442 }
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443
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444 int opEquals(Object o)
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445 {
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446 if (auto id = cast(Identifier)o)
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447 return typeid(char[]).equals(&name, &id.name);
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448 return 0;
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449 }
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450
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4ae365eff712 Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
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451 Exp simplify()
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452 {
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453 return this;
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454 }
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455
1
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456 Token token;
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457 char[] name;
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458 private DType myType;
1
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459 }
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