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annotate trunk/src/dil/doc/Macro.d @ 744:7173ece1b696

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Wrapped some macro functions inside struct MacroExpander. Warning messages from the macro expansion pass are collected now. Tidied up predefined.ddoc a bit, and added some macros. Added two messages to struct MSG. Added another opCatAssign to class InfoManager.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Sat, 09 Feb 2008 22:54:31 +0100
parents 35184354a502
children 00f872d949ea
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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.doc.Macro;
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6
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7 import dil.doc.Parser;
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8 import dil.lexer.Funcs;
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9 import dil.Unicode;
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10 import dil.Information;
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11 import dil.Messages;
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12 import common;
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13
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14 class Macro
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15 {
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16 string name; /// The name of the macro.
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17 string text; /// Substitution text.
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18 uint callLevel; /// Recursive call level.
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19 this (string name, string text)
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20 {
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21 this.name = name;
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22 this.text = text;
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23 }
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24 }
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25
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26 class MacroTable
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27 {
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28 MacroTable parent;
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29 Macro[string] table;
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30
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31 this(MacroTable parent = null)
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32 {
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33 this.parent = parent;
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34 }
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35
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36 void insert(Macro macro_)
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37 {
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38 table[macro_.name] = macro_;
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39 }
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40
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41 void insert(Macro[] macros)
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42 {
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43 foreach (macro_; macros)
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44 insert(macro_);
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45 }
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46
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47 void insert(string name, string text)
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48 {
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49 insert(new Macro(name, text));
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50 }
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51
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52 void insert(string[] names, string[] texts)
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53 {
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54 assert(names.length == texts.length);
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55 foreach (i, name; names)
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56 insert(name, texts[i]);
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57 }
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58
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59 Macro search(string name)
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60 {
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61 auto pmacro = name in table;
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62 if (pmacro)
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63 return *pmacro;
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64 if (parent)
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65 return parent.search(name);
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66 return null;
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67 }
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68
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69 bool isRoot()
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70 { return parent is null; }
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71 }
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72
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73 struct MacroParser
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74 {
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75 Macro[] parse(string text)
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76 {
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77 IdentValueParser parser;
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78 auto idvalues = parser.parse(text);
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79 auto macros = new Macro[idvalues.length];
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80 foreach (i, idvalue; idvalues)
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81 macros[i] = new Macro(idvalue.ident, idvalue.value);
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82 return macros;
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83 }
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84 }
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85
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86 struct MacroExpander
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87 {
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88 MacroTable mtable; /// Used to look up macros.
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89 InfoManager infoMan; /// Collects warning messages.
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90 char[] filePath; /// Used in warning messages.
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91
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92 static char[] expand(MacroTable mtable, char[] text,
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93 char[] filePath,
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94 InfoManager infoMan = null)
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95 {
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96 MacroExpander me;
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97 me.mtable = mtable;
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98 me.infoMan = infoMan;
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99 me.filePath = filePath;
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100 return me.expandMacros(text);
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101 }
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102
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103 void warning(char[] msg, char[] macroName)
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104 {
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105 msg = Format(msg, macroName);
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106 if (infoMan)
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107 infoMan ~= new Warning(new Location(filePath, 0), msg);
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108 }
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109
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110 /// Expands the macros from the table in text.
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111 char[] expandMacros(char[] text, char[][] args = null)
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112 {
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113 char[] result;
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114 char* p = text.ptr;
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115 char* textEnd = p + text.length;
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116 char* macroEnd = p;
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117 while (p+3 < textEnd) // minimum 4 chars: $(x)
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118 {
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119 if (*p == '$' && p[1] == '(')
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120 {
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121 // Copy string between macros.
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122 if (macroEnd !is p)
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123 result ~= makeString(macroEnd, p);
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124 p += 2;
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125 auto idBegin = p;
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126 if (isidbeg(*p) || isUnicodeAlpha(p, textEnd)) // IdStart
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127 {
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128 do // IdChar*
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129 p++;
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130 while (p < textEnd && (isident(*p) || isUnicodeAlpha(p, textEnd)))
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131 // Create macro name.
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132 auto macroName = makeString(idBegin, p);
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133 // Get arguments.
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134 auto macroArgs = scanArguments(p, textEnd);
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135 // TODO: still expand macro if no closing bracket was found?
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136 if (p == textEnd)
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137 {
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138 warning(MSG.UnterminatedDDocMacro, macroName);
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139 break; // No closing bracket found.
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140 }
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141 assert(*p == ')');
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142 p++;
744
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143 macroEnd = p;
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144
744
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145 auto macro_ = mtable.search(macroName);
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146 if (macro_)
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147 { // Ignore recursive macro if:
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148 if (macro_.callLevel != 0 &&
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149 (macroArgs.length == 0 || // Macro has no arguments.
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150 args.length && args[0] == macroArgs[0]) // arg0 == macroArg0.
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151 )
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152 continue;
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153 macro_.callLevel++;
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154 auto expandedText = expandArguments(macro_.text, macroArgs);
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155 result ~= expandMacros(expandedText, macroArgs);
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156 macro_.callLevel--;
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157 }
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158 else
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159 warning(MSG.UndefinedDDocMacro, macroName);
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160 continue;
725
84291c0a9e13 Added member callLevel to class Macro.
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diff changeset
161 }
723
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162 }
744
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163 p++;
723
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164 }
744
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165 if (macroEnd < textEnd)
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166 result ~= makeString(macroEnd, textEnd);
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167 return result;
723
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168 }
722
ceaac6a24258 Added isUnicodeAlpha() for DDocParser and MacroParser.
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169
744
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170 /// Scans until the closing ')' is found.
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171 /// Returns: ['$0', $1, $2 ...].
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172 char[][] scanArguments(ref char* p, char* textEnd)
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173 out(args) { assert(args.length != 1); }
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174 body
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175 {
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176 // D specs: "The argument text can contain nested parentheses,
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177 // "" or '' strings, comments, or tags."
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178 uint level = 1; // Nesting level of the parentheses.
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179 char[][] args;
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180
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181 // Skip leading spaces.
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182 while (p < textEnd && isspace(*p))
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183 p++;
724
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184
744
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185 char* arg0Begin = p; // Whole argument list.
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186 char* argBegin = p;
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187 Loop:
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188 while (p < textEnd)
724
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189 {
744
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190 switch (*p)
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191 {
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192 case ',':
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193 if (level != 1) // Ignore comma if inside ().
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194 break;
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195 // Add a new argument.
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196 args ~= makeString(argBegin, p);
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197 while (++p < textEnd && isspace(*p))
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198 {}
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199 argBegin = p;
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200 continue;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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201 case '(':
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202 level++;
731
ca7607226caa Added new module cmd.DDoc.
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203 break;
744
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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204 case ')':
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205 if (--level == 0)
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206 break Loop;
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207 break;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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208 case '"', '\'':
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209 auto c = *p;
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210 while (++p < textEnd && *p != c) // Scan to next " or '.
724
0b8a6e876b6d Added scanArguments() and expandArguments() to dil.doc.Macro.
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diff changeset
211 {}
744
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diff changeset
212 assert(*p == c || p == textEnd);
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213 if (p == textEnd)
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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214 break Loop;
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215 break;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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216 case '<':
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217 if (p+3 < textEnd && p[1] == '!' && p[2] == '-' && p[3] == '-') // <!--
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diff changeset
218 {
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diff changeset
219 p += 3;
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diff changeset
220 // Scan to closing "-->".
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diff changeset
221 while (++p + 2 < textEnd)
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diff changeset
222 if (*p == '-' && p[1] == '-' && p[2] == '>')
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diff changeset
223 {
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diff changeset
224 p += 3;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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225 continue Loop;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
226 }
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
227 p = textEnd; // p += 2;
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diff changeset
228 } // <tag ...> or </tag>
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diff changeset
229 else if (p+1 < textEnd && (isalpha(p[1]) || p[1] == '/'))
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diff changeset
230 while (++p < textEnd && *p != '>') // Skip to closing '>'.
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diff changeset
231 {}
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
232 if (p == textEnd)
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
233 break Loop;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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234 break;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
235 default:
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diff changeset
236 }
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
237 p++;
724
0b8a6e876b6d Added scanArguments() and expandArguments() to dil.doc.Macro.
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diff changeset
238 }
744
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
239 assert(*p == ')' && level == 0 || p == textEnd);
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diff changeset
240 if (arg0Begin is p)
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
241 return null;
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242 // arg0 spans the whole argument list.
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
243 auto arg0 = makeString(arg0Begin, p);
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244 // Add last argument.
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diff changeset
245 args ~= makeString(argBegin, p);
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diff changeset
246 return arg0 ~ args;
724
0b8a6e876b6d Added scanArguments() and expandArguments() to dil.doc.Macro.
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diff changeset
247 }
0b8a6e876b6d Added scanArguments() and expandArguments() to dil.doc.Macro.
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diff changeset
248
744
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diff changeset
249 /// Expands "$+", "$0" - "$9" with args[n] in text.
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250 /// Params:
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251 /// text = the text to scan for argument placeholders.
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252 /// args = the first element, args[0], is the whole argument string and
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diff changeset
253 /// the following elements are slices into it.
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diff changeset
254 /// The array is empty if there are no arguments.
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diff changeset
255 char[] expandArguments(char[] text, char[][] args)
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
256 in { assert(args.length != 1, "zero or more than 1 args expected"); }
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diff changeset
257 body
724
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diff changeset
258 {
744
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diff changeset
259 char[] result;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
260 char* p = text.ptr;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
261 char* textEnd = p + text.length;
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diff changeset
262 char* placeholderEnd = p;
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
263
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
264 while (p+1 < textEnd)
724
0b8a6e876b6d Added scanArguments() and expandArguments() to dil.doc.Macro.
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diff changeset
265 {
744
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diff changeset
266 if (*p == '$' && (p[1] == '+' || isdigit(p[1])))
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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diff changeset
267 {
7173ece1b696 Wrapped some macro functions inside struct MacroExpander.
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268 // Copy string between argument placeholders.
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269 if (placeholderEnd !is p)
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270 result ~= makeString(placeholderEnd, p);
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271 p++;
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272 placeholderEnd = p + 1; // Set new argument end.
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273
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274 if (args.length == 0)
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275 continue;
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276
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277 if (*p == '+')
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278 { // $+ = $2 to $n
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279 if (args.length > 2)
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280 result ~= makeString(args[2].ptr, args[0].ptr + args[0].length);
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281 }
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282 else
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283 { // 0 - 9
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284 uint nthArg = *p - '0';
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285 if (nthArg < args.length)
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286 result ~= args[nthArg];
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287 }
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288 }
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289 p++;
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290 }
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291 if (placeholderEnd < textEnd)
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292 result ~= makeString(placeholderEnd, textEnd);
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293 return result;
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294 }
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295 }