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Simple debug helper. Unittests. Meta-object for polymorphic non-QObjects
author Max Samukha <maxter@spambox.com>
date Thu, 08 Jul 2010 17:19:05 +0300
parents f69341b40588
children d0a103f25091 e67ce7c21758
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1
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1 /**
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2 *
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3 * Copyright: Copyright QtD Team, 2008-2009
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4 * Authors: Max Samukha, Eldar Insafutdinov
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5 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>
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6 *
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7 * Copyright QtD Team, 2008-2009
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8 * Distributed under the Boost Software License, Version 1.0.
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9 * (See accompanying file boost-license-1.0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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10 *
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11 */
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12 module qtd.Signal;
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13
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14 import core.stdc.stdlib : crealloc = realloc, cfree = free;
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15 import core.stdc.string : memmove;
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16 import std.string : strip;
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17
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18 import
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19 core.thread,
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20 core.exception,
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21
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22 std.typetuple,
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23 std.conv,
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24 std.traits,
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25
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26 qt.QGlobal,
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27 qtd.String,
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28 qtd.Marshal,
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29 qtd.meta.Compiletime,
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30 qtd.ctfe.Format;
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31
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32 /** The beast that takes string representation of function arguments
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33 * and returns an array of default values it doesn't check if arguments
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34 * without default values follow the arguments with default values for
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35 * simplicity. It is done by mixing in a delegate alias.
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36 */
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37 string[] defaultValues(string signature)
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38 {
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39 int braces = 0;
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40 bool inDefaultValue = false;
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41 bool inStringLiteral = false;
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42 string[] res;
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43 int startValue = 0;
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44
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45 if(strip(signature).length == 0)
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46 return res;
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47
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48 foreach (i,c; signature)
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49 {
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50 if(!inStringLiteral)
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51 {
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52 if(c == '{' || c =='(')
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53 braces++;
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54 else if(c == '}' || c ==')')
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55 braces--;
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56 }
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57
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58 if(c == '\"' || c == '\'')
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59 {
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60 if (inStringLiteral)
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61 {
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62 if(signature[i-1] != '\\')
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63 inStringLiteral = false;
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64 }
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65 else
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66 {
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67 inStringLiteral = true;
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68 }
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69 }
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70
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71 if (!inStringLiteral && braces == 0)
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72 {
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73 if(c == '=') // found default value
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74 {
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75 inDefaultValue = true;
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76 startValue = i+1;
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77 }
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78 else if(c == ',') // next function argument
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79 {
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80 if (inDefaultValue)
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81 {
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82 res ~= signature[startValue..i];
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83 inDefaultValue = false;
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84 }
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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 if (inDefaultValue)
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90 res ~= signature[startValue..$];
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91
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92 return res;
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93 }
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94
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95 /**
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96 Generates D-to-C++ conversion code for signals.
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97 */
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98 string genConvToCpp(uint argIndex)
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99 {
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100 string res = format_ctfe(q{
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101
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102 static if (isStringType!(Args[${0}]))
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103 {
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104 auto _tmp${0} = QString(_t${0});
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105 _a[${0}] = cast(void*)&_tmp${0};
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106 }
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107 else static if (isQObjectType!(Args[${0}]) || isObjectType!(Args[${0}]))
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108 {
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109 void* _tmp${0} = _t${0} ? _t${0}.qtdNativeId : null;
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110 _a[${0}] = &_tmp${0};
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111 }
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112 else static if (isValueType!(Args[${0}]))
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113 _a[${0}] = _t${0}.qtdNativeId;
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114 else
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115 _a[${0}] = cast(void*)&_t${0};
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116
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117 }, argIndex);
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118
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119 return res;
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120 }
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121
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122 string genSignalEmitter(SignalKind signalKind, string name, uint localIndex, uint argCount)
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123 {
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124 string res;
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125
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126 // signature
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127 //
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128 if (signalKind != SignalKind.BindQtSignal)
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129 res ~= "protected ";
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130
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131 res ~= "Args[0] " ~ name;
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132
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133 if (signalKind == SignalKind.BindQtSignal)
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134 res ~= "_emit";
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135
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136 res ~= "(";
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137
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138 foreach (i; 1..argCount)
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139 {
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140 auto iStr = to!string(i);
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141 if (i > 1)
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142 res ~= ", ";
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143 res ~= "Args[" ~ iStr ~ "] _t" ~ iStr;
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144 }
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145
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146 res ~= ") {\n";
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147
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148 // body
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149 //
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150 res ~= " void*[" ~ to!string(argCount) ~ "] _a;\n";
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151 foreach (i; 1..argCount)
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152 res ~= genConvToCpp(i);
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153
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154 res ~= " QMetaObject.activate(this, typeof(this).staticMetaObject, "
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155 ~ to!string(localIndex) ~ ", _a.ptr);\n";
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156
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157 return res ~= "}\n";
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158 }
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159
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160 // BUG: parameter storage classes are not supported yet
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161 mixin template SignalEmitter(SignalKind signalKind, int localIndex)
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162 {
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163 import std.traits;
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164
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165 alias signals[localIndex] signal;
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166 alias TypeTuple!(ReturnType!(signal), ParameterTypeTuple!(signal)) Args;
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167
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168 /+
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169 pragma(msg, genSignalEmitter(signalKind,
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170 methodName!signal,
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171 localIndex,
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172 Args.length));
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173 +/
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174
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175 mixin (genSignalEmitter(signalKind,
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176 methodName!signal,
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177 localIndex,
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178 Args.length));
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179 }
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180 /** ---------------- */
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181
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182
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183 enum SignalKind
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184 {
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185 BindQtSignal,
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186 NewSignal,
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187 NewSlot
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188 }
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189
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190 string signature(T...)(string name)
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191 {
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192 string res = name ~ "(";
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193 foreach(i, _; T)
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194 {
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195 if(i > 0)
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196 res ~= ",";
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197 static if (isNativeType!(T[i]))
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198 res ~= Unqual!(T[i]).stringof;
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199 else
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200 res ~= T[i].stringof;
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201 }
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202 res ~= ")";
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203 return res;
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204 }
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205
319
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206 // ------------------------------------------------------------------
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207
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208 string[] getSymbols(C)(string prefix)
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209 {
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210 string[] result;
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211 auto allSymbols = __traits(derivedMembers, C);
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212 foreach(s; allSymbols)
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213 {
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214 if(startsWith(s, prefix))
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215 result ~= s;
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216 }
319
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217 return result;
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218 }
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219
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220 string removePrefix(string source)
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221 {
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222 foreach (i, c; source)
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223 {
319
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224 if (c == '_')
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225 return source[i+1..$];
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226 }
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227 return source;
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228 }
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229
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230 // recursive search in the static meta-information
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231 template findSymbolsImpl2(C, alias signals, int id)
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232 {
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233 alias qtd.meta.Compiletime.Alias!(__traits(getOverloads, C, signals[id])) current;
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234 static if (signals.length - id - 1 > 0)
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235 alias TypeTuple!(current, findSymbolsImpl2!(C, signals, id + 1).result) result;
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236 else
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237 alias TypeTuple!(current) result;
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238 }
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239
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240 template findSymbols2(C, string prefix)
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241 {
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242 enum signals = getSymbols!(C)(prefix);
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243 static if (signals)
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244 alias findSymbolsImpl2!(C, signals, 0).result result;
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245 else
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246 alias TypeTuple!() result;
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247 }
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248
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249 template findSignals(C)
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250 {
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251 alias findSymbols2!(C, "signal_").result findSignals;
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252 }
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253
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254 template findSlots(C)
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255 {
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256 alias findSymbols2!(C, "slot_").result findSlots;
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257 }
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258
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259 template methodName(alias method)
319
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260 {
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261 enum methodName = removePrefix(__traits(identifier, method));
372
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262 }