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annotate trunk/src/dil/semantic/Pass1.d @ 696:c67d2c3c0b3d

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Wrote code for SemanticPass2.visit(ImportExpression).
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Thu, 24 Jan 2008 19:09:48 +0100
parents d33895f679eb
children efa5fcb9aa14
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module dil.semantic.Pass1;
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6
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7 import dil.ast.Visitor;
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8 import dil.ast.Node,
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9 dil.ast.Declarations,
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10 dil.ast.Expressions,
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11 dil.ast.Statements,
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12 dil.ast.Types,
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13 dil.ast.Parameters;
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14 import dil.lexer.IdTable;
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15 import dil.semantic.Symbol,
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16 dil.semantic.Symbols,
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17 dil.semantic.Types,
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18 dil.semantic.Scope,
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19 dil.semantic.Module,
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20 dil.semantic.Analysis;
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21 import dil.Location;
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22 import dil.Information;
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23 import dil.Messages;
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24 import dil.Enums;
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25 import dil.CompilerInfo;
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26 import common;
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27
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28 /++
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29 The fist pass is the declaration pass.
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30 The basic task of this class is to traverse the parse tree,
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31 find all kinds of declarations and add them
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32 to the symbol tables of their respective scopes.
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33 +/
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34 class SemanticPass1 : Visitor
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35 {
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36 Scope scop; /// The current scope.
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37 Module modul; /// The module to be semantically checked.
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38
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39 // Attributes:
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40 LinkageType linkageType;
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41 Protection protection;
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42 StorageClass storageClass;
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43 uint alignSize = DEFAULT_ALIGN_SIZE;
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44
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45 /++
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46 Construct a SemanticPass1 object.
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47 Params:
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48 modul = the module to be processed.
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49 +/
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50 this(Module modul)
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51 {
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52 this.modul = modul;
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53 }
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54
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55 /// Start semantic analysis.
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56 void start()
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57 {
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58 assert(modul.root !is null);
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59 // Create module scope.
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60 scop = new Scope(null, modul);
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61 visit(modul.root);
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62 }
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63
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64 void enterScope(ScopeSymbol s)
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65 {
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66 scop = scop.enter(s);
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67 }
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68
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69 void exitScope()
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70 {
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71 scop = scop.exit();
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72 }
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73
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74 /// Insert a symbol into the current scope.
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75 void insert(Symbol sym, Identifier* ident)
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76 {
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77 auto sym2 = scop.symbol.lookup(ident);
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78 if (sym2)
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79 reportSymbolConflict(sym, sym2, ident);
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80 else
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81 scop.symbol.insert(sym, ident);
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82 // Set the current scope symbol as the parent.
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83 sym.parent = scop.symbol;
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84 }
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85
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86 /// Insert a symbol, overloading on the name, into the current scope.
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87 void insertOverload(Symbol sym, Identifier* ident)
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88 {
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89 auto sym2 = scop.symbol.lookup(ident);
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90 if (sym2)
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91 {
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92 if (sym2.isOverloadSet)
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93 (cast(OverloadSet)cast(void*)sym2).add(sym);
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94 else
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95 reportSymbolConflict(sym, sym2, ident);
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96 }
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97 else
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98 // Create a new overload set.
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99 scop.symbol.insert(new OverloadSet(ident, sym.node), ident);
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100 // Set the current scope symbol as the parent.
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101 sym.parent = scop.symbol;
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102 }
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103
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104 /// Report error: new symbol s1 conflicts with existing symbol s2.
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105 void reportSymbolConflict(Symbol s1, Symbol s2, Identifier* ident)
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106 {
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107 auto loc = s2.node.begin.getErrorLocation();
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108 auto locString = Format("{}({},{})", loc.filePath, loc.lineNum, loc.colNum);
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109 error(s1.node.begin, MSG.DeclConflictsWithDecl, ident.str, locString);
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110 }
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111
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112 void error(Token* token, char[] formatMsg, ...)
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113 {
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114 if (!modul.infoMan)
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115 return;
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116 auto location = token.getErrorLocation();
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117 auto msg = Format(_arguments, _argptr, formatMsg);
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118 modul.infoMan ~= new SemanticError(location, msg);
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119 }
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120
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121
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122 static class Deferred
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123 {
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124 Node node;
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125 ScopeSymbol symbol;
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126 // Saved attributes.
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127 LinkageType linkageType;
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128 Protection protection;
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129 StorageClass storageClass;
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130 uint alignSize;
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131 }
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132
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133 // List of mixin, static if and pragma(msg,...) declarations.
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134 // Their analysis must be deferred because they entail
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135 // evaluation of expressions.
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136 Deferred[] deferred;
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137
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138 void addDeferred(Node node)
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139 {
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140 auto d = new Deferred;
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141 d.node = node;
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142 d.symbol = scop.symbol;
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143 d.linkageType = linkageType;
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144 d.protection = protection;
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145 d.storageClass = storageClass;
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146 d.alignSize = alignSize;
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147 deferred ~= d;
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148 }
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149
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150 private alias Declaration D;
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151
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152 override
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153 {
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154 D visit(CompoundDeclaration d)
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155 {
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156 foreach (decl; d.decls)
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157 visitD(decl);
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158 return d;
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159 }
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160
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161 D visit(IllegalDeclaration)
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162 { assert(0, "semantic pass on invalid AST"); return null; }
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163
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164 D visit(EmptyDeclaration ed)
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165 { return ed; }
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166
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167 D visit(ModuleDeclaration)
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168 { return null; }
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169
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170 D visit(ImportDeclaration d)
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171 {
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172 return d;
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173 }
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174
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175 D visit(AliasDeclaration ad)
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176 {
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177 return ad;
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178 }
648
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179
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180 D visit(TypedefDeclaration td)
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181 {
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182 return td;
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183 }
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184
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185 D visit(EnumDeclaration d)
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186 {
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187 // Create the symbol.
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188 d.symbol = new Enum(d.name, d);
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189 if (d.name)
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190 { // Declare named enum.
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191 insert(d.symbol, d.name);
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192 enterScope(d.symbol);
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193 }
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194 // Declare members.
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195 foreach (member; d.members)
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196 {
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197 auto variable = new Variable(member.name, protection, storageClass, linkageType, member);
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198 insert(variable, variable.name);
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199 }
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200 if (d.name)
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201 exitScope();
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202 return d;
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203 }
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204
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205 D visit(EnumMemberDeclaration)
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206 { return null; }
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207
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208 D visit(ClassDeclaration d)
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209 {
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210 if (d.symbol)
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211 return d;
636
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212 d.symbol = new Class(d.name, d);
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213 // Insert into current scope.
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214 if (d.tparams)
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215 insertOverload(d.symbol, d.name);
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216 else
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217 insert(d.symbol, d.name);
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218 enterScope(d.symbol);
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219 // Continue semantic analysis.
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220 d.decls && visitD(d.decls);
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221 exitScope();
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222 return d;
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223 }
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224
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225 D visit(InterfaceDeclaration d)
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226 {
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227 if (d.symbol)
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228 return d;
636
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229 d.symbol = new dil.semantic.Symbols.Interface(d.name, d);
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230 // Insert into current scope.
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231 if (d.tparams)
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232 insertOverload(d.symbol, d.name);
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233 else
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234 insert(d.symbol, d.name);
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235 enterScope(d.symbol);
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236 // Continue semantic analysis.
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237 d.decls && visitD(d.decls);
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238 exitScope();
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239 return d;
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240 }
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241
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242 D visit(StructDeclaration d)
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243 {
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244 if (d.symbol)
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245 return d;
636
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246 d.symbol = new Struct(d.name, d);
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247 // Insert into current scope.
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248 if (d.name)
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249 {
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250 if (d.tparams)
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251 insertOverload(d.symbol, d.name);
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252 else
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253 insert(d.symbol, d.name);
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254 }
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255 enterScope(d.symbol);
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256 // Continue semantic analysis.
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257 d.decls && visitD(d.decls);
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258 exitScope();
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259 return d;
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260 }
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261
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262 D visit(UnionDeclaration d)
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263 {
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264 if (d.symbol)
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265 return d;
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266 d.symbol = new Union(d.name, d);
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267 // Insert into current scope.
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268 if (d.name)
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269 {
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diff changeset
270 if (d.tparams)
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diff changeset
271 insertOverload(d.symbol, d.name);
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diff changeset
272 else
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273 insert(d.symbol, d.name);
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274 }
636
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diff changeset
275 enterScope(d.symbol);
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276 // Continue semantic analysis.
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277 d.decls && visitD(d.decls);
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278 exitScope();
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279 return d;
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280 }
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281
683
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282 D visit(ConstructorDeclaration)
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283 { return null; }
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284 D visit(StaticConstructorDeclaration)
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285 { return null; }
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286 D visit(DestructorDeclaration)
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287 { return null; }
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288 D visit(StaticDestructorDeclaration)
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289 { return null; }
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290 D visit(FunctionDeclaration)
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291 { return null; }
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292
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293 D visit(VariablesDeclaration vd)
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294 {
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295 // Error if we are in an interface.
692
d33895f679eb Tidied up the class Scope a bit.
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diff changeset
296 if (scop.symbol.isInterface)
683
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297 return error(vd.begin, MSG.InterfaceCantHaveVariables), vd;
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298
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299 // Insert variable symbols in this declaration into the symbol table.
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parents: 680
diff changeset
300 foreach (name; vd.names)
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diff changeset
301 {
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302 auto variable = new Variable(name, protection, storageClass, linkageType, vd);
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diff changeset
303 vd.variables ~= variable;
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diff changeset
304 insert(variable, name);
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305 }
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306 return vd;
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307 }
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308
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Aziz K?ksal <aziz.koeksal@gmail.com>
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309 D visit(InvariantDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
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310 { return null; }
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Aziz K?ksal <aziz.koeksal@gmail.com>
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311 D visit(UnittestDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
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312 { return null; }
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Aziz K?ksal <aziz.koeksal@gmail.com>
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313 D visit(DebugDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
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314 { return null; }
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Aziz K?ksal <aziz.koeksal@gmail.com>
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315 D visit(VersionDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
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316 { return null; }
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317
686
e8c09d13f2a5 Added class Deferred to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 683
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318 D visit(StaticAssertDeclaration)
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319 { return null; }
683
1ae72234db26 Implemented some methods in SemanticPass1.
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diff changeset
320
1ae72234db26 Implemented some methods in SemanticPass1.
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parents: 680
diff changeset
321 D visit(TemplateDeclaration d)
636
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322 {
15a0f37caabe Added more visit() methods to dil.semantic.SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
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323 if (d.symbol)
641
3569c2fc6124 Fixed some return statements.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 636
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324 return d;
683
1ae72234db26 Implemented some methods in SemanticPass1.
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325 d.symbol = new Template(d.name, d);
636
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326 // Insert into current scope.
683
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diff changeset
327 insertOverload(d.symbol, d.name);
636
15a0f37caabe Added more visit() methods to dil.semantic.SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
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328 enterScope(d.symbol);
635
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329 // Continue semantic analysis.
683
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diff changeset
330 visitD(d.decls);
636
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331 exitScope();
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332 return d;
635
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333 }
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parents:
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334
683
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
335 D visit(NewDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
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336 { /*add id to env*/return null; }
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Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
337 D visit(DeleteDeclaration)
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Aziz K?ksal <aziz.koeksal@gmail.com>
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338 { /*add id to env*/return null; }
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
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diff changeset
339
683
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
340 D visit(ProtectionDeclaration d)
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
341 {
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
342 auto saved = protection; // Save.
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Aziz K?ksal <aziz.koeksal@gmail.com>
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343 protection = d.prot; // Set.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
344 visitD(d.decls);
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Aziz K?ksal <aziz.koeksal@gmail.com>
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345 protection = saved; // Restore.
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346 return d;
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
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347 }
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
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diff changeset
348
683
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
349 D visit(StorageClassDeclaration d)
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Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
350 {
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diff changeset
351 auto saved = storageClass; // Save.
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diff changeset
352 storageClass = d.storageClass; // Set.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
353 visitD(d.decls);
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
354 storageClass = saved; // Restore.
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Aziz K?ksal <aziz.koeksal@gmail.com>
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355 return d;
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parents: 680
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356 }
649
3ebe76ad680e Using SemanticPass1 in main.d do start semantic analysis.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 648
diff changeset
357
683
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
358 D visit(LinkageDeclaration d)
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
359 {
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
360 auto saved = linkageType; // Save.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
361 linkageType = d.linkageType; // Set.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
362 visitD(d.decls);
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
363 linkageType = saved; // Restore.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
364 return d;
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
365 }
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
366
683
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
367 D visit(AlignDeclaration d)
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
368 {
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
369 auto saved = alignSize; // Save.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
370 alignSize = d.size; // Set.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
371 visitD(d.decls);
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
372 alignSize = saved; // Restore.
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
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373 return d;
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
374 }
1ae72234db26 Implemented some methods in SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 680
diff changeset
375
690
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
376 D visit(StaticIfDeclaration d)
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
377 {
690
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
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parents: 686
diff changeset
378 addDeferred(d);
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
379 return d;
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
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parents: 686
diff changeset
380 }
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
381
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
382 D visit(MixinDeclaration d)
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
383 {
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
384 addDeferred(d);
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
385 return d;
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
386 }
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
387
690
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
388 D visit(PragmaDeclaration d)
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
389 {
690
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
390 if (d.ident is Ident.msg)
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
391 addDeferred(d);
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
392 else
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
393 {
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
394 pragmaSemantic(scop, d.begin, d.ident, d.args);
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
395 visitD(d.decls);
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Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
396 }
eaf6444b6284 Adding pragma(msg,...) declarations to deferred list.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 686
diff changeset
397 return d;
648
4ae7b13aaac8 Moved some semantic() methods to SemanticPass1.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 646
diff changeset
398 }
635
b2fc028d8b55 Added class Visitor.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
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399 } // override
b2fc028d8b55 Added class Visitor.
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parents:
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400 }