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annotate parser/Action.d @ 153:ee202c72cd30

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Merge
author Anders Halager <halager@gmail.com>
date Mon, 21 Jul 2008 21:32:20 +0200
parents 6c5a3c0bb4fb 393a1f47a6d2
children 57b0b4464a0b
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1 module parser.Action;
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2
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3 import lexer.Token;
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4
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5 import basic.Attribute;
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6
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7 /**
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8 Used to indicate what type of operator is used in a given binary expression
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9 (and unary expressions?)
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10 */
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11 public enum Operator
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12 {
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13 Assign,
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14 AddAssign,
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15 SubAssign,
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16 MulAssign,
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17 DivAssign,
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18 ModAssign,
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19
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20 Eq, Ne,
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22 Lt, Le,
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23 Gt, Ge,
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25 Add, Sub,
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26 Mul, Div, Mod,
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28 LeftShift, RightShift, UnsignedRightShift,
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29 }
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32 class Id
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33 {
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34 public static Id opCall(Token tok)
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35 {
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36 auto id = new Id();
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37 id.tok = tok;
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38 return id;
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39 }
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40 Token tok;
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41 }
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42
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43 class PointerId : Id
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44 {
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45 public static PointerId opCall(Id id)
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46 {
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47 auto p = new PointerId();
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48 p.id = id;
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49 return p;
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50 }
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51
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52 Id id;
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53 }
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54
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55 class StaticArrayId : Id
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56 {
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57 public static StaticArrayId opCall(Id id, Object number)
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58 {
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59 auto a = new StaticArrayId();
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60 a.id = id;
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61 a.number = number;
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62 return a;
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63 }
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64
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65 Id id;
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66 Object number;
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67 }
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68
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69 /**
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70 Represents a fully qualified name, with some packages and a final identifier.
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71 The identifier should always be set, but packages may have length 0.
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72 **/
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73 struct ModuleName
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74 {
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75 Id id;
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76 Id[] packages;
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77
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78 /// Get the full ranged spanned by packages and identifier
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79 SourceRange asRange()
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80 {
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81 SourceRange r = id.tok.asRange();
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82 foreach (identifier; packages)
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83 r = r + identifier.tok.asRange();
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84 return r;
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85 }
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86 }
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87
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88 /**
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89 All methods are optional.
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90
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91 Warning: Interface is not stable yet. Use the `override` keyword in all classes
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92 inheriting from this to get warning if the interface changes.
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93 */
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94 abstract class Action
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95 {
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96 /**
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97 A few aliases to indicate what methods should be dealing with the same
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98 types.
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99
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100 Not typesafe, and not using typedef because users would need a lot of
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101 casts (and base type would be void*, so no possibility to synchronize,
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102 print etc.)
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103 */
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104 alias Object ExprT;
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105 alias Object StmtT; /// ditto
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106 alias Object DeclT; /// ditto
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107 alias Object ModuleT; /// ditto
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108
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109 // -- Modules --
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110
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111 ModuleT actOnModule(ref Token _module, char[] name)
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112 {
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113 return null;
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114 }
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115
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116 /**
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117 This action is called when a file does not start with a module
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118 declaration - in which case there is no Token available.
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119
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120 Instead a SLoc to the start of the file is given.
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121 */
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122 ModuleT actOnImplicitModule(SourceLocation fileStart, char[] name)
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123 {
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124 return null;
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125 }
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126
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127 void actOnModuleDecl(ModuleT m, DeclT d)
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128 {
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129 }
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130
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131 // -- Declarations --
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132
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133 /**
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134 Called for an import statement, that may be renamed. Id name is null,
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135 there is no rename.
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136
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137 If there are selective imports, its handled in add
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138 */
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139 DeclT actOnImport(ref Token _import, ref ModuleName target, Id* name)
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140 {
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141 return null;
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142 }
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143
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144 /**
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145 */
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146 void addSelectiveImport(DeclT _import, ref Id target, Id* name)
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147 {
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148 }
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149
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150 /**
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151 Either we should have one case that handles a lot of things, or we should
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152 have a lot of separate cases.
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153 As an example, this method could handle the params in `int f(int, int)`
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154 as well as handling `int x` at both top-level, in classes and in methods.
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155
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156 The other solution is an addParamToFunc or similar.
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157 */
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158 DeclT actOnDeclarator(ref Id type, ref Id name, ExprT init, Attribute att)
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159 {
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160 return null;
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161 }
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162
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163 /**
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164 Add a struct member to a struct.
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165 */
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166 void actOnStructMember(DeclT st_decl, DeclT m_decl)
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167 {
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168 return null;
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169 }
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170
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171 /**
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172 Add a class member to a struct.
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173 */
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174 void actOnClassMember(DeclT cl_decl, DeclT m_decl)
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175 {
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176 return null;
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177 }
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178
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179 /**
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180 Add a class member to a struct.
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181 */
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182 void actOnClassBaseClass(DeclT cl_decl, ref Id name)
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183 {
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184 return null;
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185 }
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186
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187 /**
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188 Add a class member to a struct.
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189 */
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190 void actOnInterfaceMember(DeclT if_decl, DeclT m_decl)
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191 {
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192 return null;
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193 }
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194
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195 /**
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196 Add a class member to a struct.
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197 */
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198 void actOnInterfaceBaseClass(DeclT if_decl, ref Id name)
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199 {
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200 return null;
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201 }
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202
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203 /**
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204 Add an initialization expression to a previously created decl.
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205
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206 Used for default values on function params and for values to local
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207 variables.
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208 */
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209 void addInitToDeclarator(DeclT decl, ExprT exp)
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210 {
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211 }
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212
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213 /**
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214 Called at the start of a function, doesn't get a lot of info - that is
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215 added later on, through addFuncArg and actOnEndOfFunction.
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216 */
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217 DeclT actOnStartOfFunctionDef(ref Id type, ref Id name, Attribute att)
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218 {
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219 return null;
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220 }
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221
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222 /**
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223 Add a new parameter to the function func.
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224 */
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225 void addFuncArg(DeclT func, Id type, Id name)
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226 {
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227 }
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228
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229 /**
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230 Finish off the function, by giving it the body (a single statement, so
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231 you probably want some sort of compound statement)
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232 */
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233 DeclT actOnEndOfFunction(DeclT func, StmtT stmts)
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234 {
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235 return func;
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236 }
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237
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238 // -- Statements --
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239
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240 /**
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241 Called after parsing a function/while/for/whatever body.
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242
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243 Note that stmts is to be considered temporary, it might point into the
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244 stack and needs to be copied before saving.
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245 */
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246 StmtT actOnCompoundStmt(ref Token left, ref Token right, StmtT[] stmts)
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247 {
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248 return null;
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249 }
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250
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251 /**
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252 An expression was used as a statement - this includes assignments,
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253 function calls.
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254
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255 Additionally the D spec dictates that expressions with no effect are not
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256 legal as statements, but the parser can't test for this so it has to be
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257 done in the later stages.
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258 */
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259 StmtT actOnExprStmt(ExprT exp)
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260 {
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261 return null;
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262 }
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263
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264 /**
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265 Called after parsing return statements.
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266
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267 loc is the return token.
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268 */
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269 StmtT actOnReturnStmt(ref Token loc, ExprT exp)
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270 {
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271 return null;
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272 }
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273
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274 /**
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275 */
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276 StmtT actOnIfStmt(ref Token ifTok, ExprT cond, StmtT thenBody,
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277 ref Token elseTok, StmtT elseBody)
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278 {
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279 return null;
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280 }
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281
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282 /**
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283 */
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284 StmtT actOnWhileStmt(ref Token whileTok, ExprT cond, StmtT whileBody)
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285 {
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286 return null;
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287 }
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288
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289 /**
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290 */
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291 StmtT actOnForStmt(ref Token forTok, StmtT init, ExprT cond, ExprT incre, StmtT forBody)
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292 {
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293 return null;
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294 }
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295
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296 /**
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297 */
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298 StmtT actOnDeclStmt(DeclT decl)
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299 {
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300 return null;
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301 }
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302
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303 StmtT actOnStartOfSwitchStmt(Token _switch, ExprT exp)
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304 {
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305 return null;
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306 }
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307
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308 void actOnCaseStmt(StmtT stmt, Token _case, ExprT[] exps, StmtT[] stmts)
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309 {
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310 }
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311
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312 void actOnDefaultStmt(StmtT stmt, Token _default, StmtT[] stmts)
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313 {
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314 }
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315
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316 StmtT actOnFinishSwitchStmt(StmtT sw)
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317 {
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318 return sw;
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319 }
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320
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321 // -- Expressions --
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322
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323 /**
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324 A single numerical constant -- this can be absolutely any kind of number.
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325 Integers, floats, hex, octal, binary, imaginary and so on.
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326 */
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327 ExprT actOnNumericConstant(Token op)
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328 {
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329 return null;
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330 }
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331
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332 /**
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333 This is called when identifiers are used in expressions.
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334 */
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335 ExprT actOnIdentifierExp(Id id)
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336 {
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337 return null;
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338 }
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339
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340 /**
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341 This is called when strings are used in expression
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342 */
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343 ExprT actOnStringExp(Token t)
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344 {
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345 return null;
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346 }
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347
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348 /**
44
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349 Unary operator.
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350 */
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351 ExprT actOnUnaryOp(Token op, ExprT operand)
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352 {
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353 return null;
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354 }
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355
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356 /**
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357 Binary operator.
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358 */
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359 ExprT actOnBinaryOp(SLoc op_loc, Operator op, ExprT l, ExprT r)
44
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360 {
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361 return null;
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362 }
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363
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364 /**
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365 Called when using the 'dot' operator.
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366 The left hand side can be any expression, but its only possible to look
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367 up an identifier.
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368 */
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369 ExprT actOnMemberReference(ExprT lhs, SourceLocation op, Id member)
44
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370 {
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371 return null;
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372 }
48
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373
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374 /**
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375 Called when function calls are encountered.
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376
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377 Note that args is temporary and might point into the stack. Remember to
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378 copy before saving a reference to it.
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379 */
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380 ExprT actOnCallExpr(ExprT func, ref Token left_paren, ExprT[] args,
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381 ref Token right_paren)
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382 {
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383 return null;
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384 }
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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parents: 53
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385
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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386 /**
83
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387 Called when function calls are encountered.
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388 */
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389 ExprT actOnIndexEpr(ExprT array, ref Token left_bracket, ExprT index,
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390 ref Token right_bracket)
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391 {
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392 return null;
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393 }
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394
9e90694f5da0 Parse array indexing, and allow reading from arrays
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395 /**
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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396 Cast expression.
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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397 */
88
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398 ExprT actOnCastExpr(ref Token _cast, Id type, ExprT exp)
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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: 53
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399 {
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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400 return null;
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401 }
44
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402 }
495188f9078e Big update - Moving towards a better, more seperated parser
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parents:
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403
495188f9078e Big update - Moving towards a better, more seperated parser
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parents:
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404 /**
49
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405 Doesn't do anything at all - can be used for benchmarking the parser.
c7cde6af0095 Seperated the AST from LLVM
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406 */
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407 class NullAction : Action
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408 {
c7cde6af0095 Seperated the AST from LLVM
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parents: 48
diff changeset
409 }
c7cde6af0095 Seperated the AST from LLVM
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parents: 48
diff changeset
410