Mercurial > projects > dstep
annotate dstep/internal/Traits.d @ 17:c2fba45df857
Fixed: indexOf didn't compile
| author | Jacob Carlborg <doob@me.com> |
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| date | Sun, 10 Jan 2010 13:22:58 +0100 |
| parents | 19885b43130e |
| children |
| rev | line source |
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| 1 | 1 /** |
| 2 * Copyright: Copyright (c) 2009 Jacob Carlborg. | |
| 3 * Authors: Jacob Carlborg | |
| 4 * Version: Initial created: Apr 28, 2009 | |
| 5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0) | |
| 6 */ | |
| 7 module dstep.internal.Traits; | |
| 8 | |
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9 import dstep.objc.bridge.Bridge; |
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10 import dstep.internal.String; |
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11 |
| 1 | 12 /** |
| 13 * Returns the name of the given function | |
| 14 * | |
| 15 * Params: | |
| 16 * func = the function alias to get the name of | |
| 17 * | |
| 18 * Returns: the name of the function | |
| 19 */ | |
| 20 template functionNameOf (alias func) | |
| 21 { | |
| 22 version(LDC) | |
| 23 const functionNameOf = (&func).stringof[1 .. $]; | |
| 24 | |
| 25 else | |
| 26 const functionNameOf = (&func).stringof[2 .. $]; | |
| 27 } | |
| 28 | |
| 29 /** | |
| 30 * Returns the parameter names of the given function | |
| 31 * | |
| 32 * Params: | |
| 33 * func = the function alias to get the parameter names of | |
| 34 * | |
| 35 * Returns: an array of strings containing the parameter names | |
| 36 */ | |
| 37 template parameterNamesOf (alias func) | |
| 38 { | |
| 39 const parameterNamesOf = parameterNamesOfImpl!(func); | |
| 40 } | |
| 41 | |
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42 private string[] parameterNamesOfImpl (alias func) () |
| 1 | 43 { |
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44 string funcStr = typeof(&func).stringof; |
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45 |
| 1 | 46 auto start = funcStr.indexOf('('); |
| 47 auto end = funcStr.indexOf(')'); | |
| 48 | |
| 49 const firstPattern = ' '; | |
| 50 const secondPattern = ','; | |
| 51 | |
| 52 funcStr = funcStr[start + 1 .. end]; | |
| 53 | |
| 54 if (funcStr == "") | |
| 55 return null; | |
| 56 | |
| 57 funcStr ~= secondPattern; | |
| 58 | |
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59 string token; |
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60 string[] arr; |
| 1 | 61 |
| 62 foreach (c ; funcStr) | |
| 63 { | |
| 64 if (c != firstPattern && c != secondPattern) | |
| 65 token ~= c; | |
| 66 | |
| 67 else | |
| 68 { | |
| 69 if (token) | |
| 70 arr ~= token; | |
| 71 | |
| 72 token = null; | |
| 73 } | |
| 74 } | |
| 75 | |
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76 if (arr.length == 1) |
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77 return arr; |
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78 |
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79 string[] result; |
| 1 | 80 bool skip = false; |
| 81 | |
| 82 foreach (str ; arr) | |
| 83 { | |
| 84 skip = !skip; | |
| 85 | |
| 86 if (skip) | |
| 87 continue; | |
| 88 | |
| 89 result ~= str; | |
| 90 } | |
| 91 | |
| 92 return result; | |
| 93 } | |
| 94 | |
| 95 /** | |
| 96 * Compile-time function to get the index of the give element. | |
| 97 * | |
| 98 * Performs a linear scan, returning the index of the first occurrence | |
| 99 * of the specified element in the array, or U.max if the array does | |
| 100 * not contain the element. | |
| 101 * | |
| 102 * Params: | |
| 103 * arr = the array to get the index of the element from | |
| 104 * element = the element to find | |
| 105 * | |
| 106 * Returns: the index of the element or size_t.max if the element was not found. | |
| 107 */ | |
| 108 private size_t indexOf (T) (T[] arr, T element) | |
| 109 { | |
| 17 | 110 foreach (i, e ; arr) |
| 111 if (e == element) | |
| 112 return i; | |
| 1 | 113 |
| 114 return size_t.max; | |
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115 } |
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116 |
| 17 | 117 //FIXME fix this when http://d.puremagic.com/issues/show_bug.cgi?id=3512 is fixed |
| 118 version (none) | |
| 119 { | |
| 120 | |
| 121 /** | |
| 122 * Compile-time function to get the index of the give element. | |
| 123 * | |
| 124 * Performs a linear scan, returning the index of the first occurrence | |
| 125 * of the specified element in the array, or U.max if the array does | |
| 126 * not contain the element. | |
| 127 * | |
| 128 * Params: | |
| 129 * arr = the array to get the index of the element from | |
| 130 * element = the element to find | |
| 131 * | |
| 132 * Returns: the index of the element or size_t.max if the element was not found. | |
| 133 */ | |
| 134 private size_t indexOf (T) (T[] arr, dchar element) | |
| 135 { | |
| 136 static assert(is(T == char) || is(T == wchar) || is(T == dchar), `dstep.internal.Traits.indexOf: The given type "` ~ T.stringof ~ `" is not valid, it has to be char, wchar or dchar`); | |
| 137 | |
| 138 foreach (i, dchar e ; arr) | |
| 139 if (e == element) | |
| 140 return i; | |
| 141 | |
| 142 return size_t.max; | |
| 143 } | |
| 144 } | |
| 145 | |
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146 /** |
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147 * Evaluates to true if $(D_PARAM T) has a instance method with the given name |
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148 * |
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149 * Params: |
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150 * T = the type of the class/struct |
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151 * method = the name of the method |
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152 */ |
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153 template hasInstanceMethod (T, string method) |
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154 { |
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155 const hasInstanceMethod = is(typeof({ |
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156 T t; |
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157 mixin("auto f = &t." ~ method ~ ";"); |
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158 })); |
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159 } |
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160 |
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161 /** |
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162 * Evaluates to true if $(D_PARAM T) has a class method with the given name |
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163 * |
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164 * Params: |
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165 * T = the type of the class/struct |
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166 * method = the name of the method |
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167 */ |
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168 template hasClassMethod (T, string method) |
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169 { |
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170 const hasClassMethod = is(typeof({ |
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171 mixin("auto f = &T." ~ method ~ ";"); |
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172 })); |
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173 } |
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174 |
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175 /** |
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176 * Evaluates to true if $(D_PARAM T) has a either a class method or a instance method |
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177 * with the given name. |
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178 * |
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179 * Params: |
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180 * T = the type of the class/struct |
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181 * method = the name of the method |
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182 */ |
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183 template hasMethod (T, string method) |
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184 { |
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185 const hasMethod = hasClassMethod!(T, method) || hasInstanceMethod!(T, method); |
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186 } |
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187 |
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188 /** |
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189 * Evaluates to true if $(D_PARAM T) has a field with the given name |
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190 * |
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191 * Params: |
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192 * T = the type of the class/struct |
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193 * field = the name of the field |
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194 */ |
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195 template hasField (T, string field) |
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196 { |
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197 const hasField = is(typeof({ |
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198 T t; |
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199 mixin("auto f = t." ~ field ~ ";"); |
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200 })); |
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201 } |
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202 |
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203 /// Evaluates to true if $(D_PARAM T) has binded methods |
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204 template hasBindedMethods (T) |
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205 { |
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206 const bool hasBindedMethods = hasField!(T, Bridge.objcClassMethodDeclarationVar) || hasField!(T, Bridge.objcMethodDeclarationVar); |
| 1 | 207 } |