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annotate trunk/src/dil/ast/Node.d @ 671:f1325a4506de

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Removed enum TID from dil.ast.Types. Renamed UndefinedType to IllegalType.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Thu, 17 Jan 2008 22:57:36 +0100
parents 15a0f37caabe
children 64fec49651cf
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1 /++
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2 Author: Aziz Köksal
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32d354584b28 - Upgraded license notices to GPL3.
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3 License: GPL3
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4 +/
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fa6d3c52757d Moved SyntaxTree.d to new package 'ast'.
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5 module dil.ast.Node;
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6
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33b566df6af4 Migrated project to Tango.
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7 import common;
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8
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9 public import dil.lexer.Token;
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10 public import dil.ast.NodesEnum;
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11
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c1fcfbce9499 - BaseClass inherits from Node now.
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12 /// This string is mixed into the constructor of a class that inherits from Node.
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13 const string set_kind = `this.kind = mixin("NodeKind." ~ typeof(this).stringof);`;
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14
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433d51c18524 Renamed template Cast to TryCast.
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15 Class TryCast(Class)(Node n)
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16 {
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17 assert(n !is null);
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18 if (n.kind == mixin("NodeKind." ~ typeof(Class).stringof))
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19 return cast(Class)cast(void*)n;
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20 return null;
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21 }
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22
495
b60450804b6e Attributes are evaluated during the parsing phase now.
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23 Class CastTo(Class)(Node n)
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24 {
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25 assert(n !is null && n.kind == mixin("NodeKind." ~ typeof(Class).stringof));
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26 return cast(Class)cast(void*)n;
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27 }
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28
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29 class Node
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30 {
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e8de572e4d01 - Changed enum NodeType to NodeCategory.
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31 NodeCategory category;
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32 NodeKind kind;
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33 Node[] children;
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34 Token* begin, end;
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35
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36 this(NodeCategory category)
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37 {
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38 assert(category != NodeCategory.Undefined);
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39 this.category = category;
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40 }
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41
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42 void setTokens(Token* begin, Token* end)
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43 {
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44 this.begin = begin;
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45 this.end = end;
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46 }
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47
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48 Class setToks(Class)(Class node)
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49 {
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50 node.setTokens(this.begin, this.end);
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51 return node;
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52 }
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53
489
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54 void addChild(Node child)
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55 {
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56 assert(child !is null, "failed in " ~ this.classinfo.name);
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57 this.children ~= child;
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58 }
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59
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60 void addOptChild(Node child)
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61 {
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62 child is null || addChild(child);
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63 }
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64
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65 void addChildren(Node[] children)
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66 {
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67 assert(children !is null && delegate{
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68 foreach (child; children)
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69 if (child is null)
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70 return false;
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71 return true; }(),
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72 "failed in " ~ this.classinfo.name
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73 );
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74 this.children ~= children;
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75 }
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76
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77 void addOptChildren(Node[] children)
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78 {
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79 children is null || addChildren(children);
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80 }
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81
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82 Class iS(Class)()
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83 {
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84 if (kind == mixin("NodeKind." ~ typeof(Class).stringof))
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85 return cast(Class)cast(void*)this;
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86 return null;
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87 }
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88
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89 Class to(Class)()
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90 {
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91 return cast(Class)cast(void*)this;
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92 }
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93
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94 static bool isDoxygenComment(Token* token)
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95 { // Doxygen: '/+!' '/*!' '//!'
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96 return token.type == TOK.Comment && token.start[2] == '!';
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97 }
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98
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99 static bool isDDocComment(Token* token)
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100 { // DDOC: '/++' '/**' '///'
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101 return token.type == TOK.Comment && token.start[1] == token.start[2];
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102 }
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103
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104 /++
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105 Returns the surrounding documentation comment tokens.
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106 Note: this function works correctly only if
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107 the source text is syntactically correct.
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108 +/
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109 Token*[] getDocComments(bool function(Token*) isDocComment = &isDDocComment)
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110 {
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111 Token*[] comments;
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112 // Get preceding comments.
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113 auto token = begin;
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114 // Scan backwards until we hit another declaration.
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115 while (1)
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116 {
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117 token = token.prev;
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118 if (token.type == TOK.LBrace ||
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119 token.type == TOK.RBrace ||
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120 token.type == TOK.Semicolon ||
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121 token.type == TOK.HEAD ||
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122 (kind == NodeKind.EnumMember && token.type == TOK.Comma))
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123 break;
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124
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125 if (token.type == TOK.Comment)
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126 {
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127 // Check that this comment doesn't belong to the previous declaration.
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128 if (kind == NodeKind.EnumMember && token.type == TOK.Comma)
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129 break;
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130 switch (token.prev.type)
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131 {
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132 case TOK.Semicolon, TOK.RBrace:
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133 break;
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134 default:
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135 if (isDocComment(token))
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136 comments ~= token;
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137 }
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138 }
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139 }
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140 // Get single comment to the right.
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141 token = end.next;
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142 if (token.type == TOK.Comment && isDocComment(token))
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143 comments ~= token;
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144 else if (kind == NodeKind.EnumMember)
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145 {
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146 token = end.nextNWS;
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147 if (token.type == TOK.Comma)
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148 {
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149 token = token.next;
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150 if (token.type == TOK.Comment && isDocComment(token))
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151 comments ~= token;
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152 }
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153 }
612
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154 return comments;
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155 }
142
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156 }