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1 /**
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2 * Copyright: Copyright (c) 2009 Jacob Carlborg.
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3 * Authors: Jacob Carlborg
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4 * Version: Initial created: Apr 28, 2009
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5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0)
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6 */
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7 module dstep.internal.Traits;
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8
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9 /**
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10 * Returns the name of the given function
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11 *
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12 * Params:
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13 * func = the function alias to get the name of
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14 *
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15 * Returns: the name of the function
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16 */
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17 template functionNameOf (alias func)
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18 {
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19 version(LDC)
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20 const functionNameOf = (&func).stringof[1 .. $];
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21
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22 else
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23 const functionNameOf = (&func).stringof[2 .. $];
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24 }
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25
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26 /**
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27 * Returns the parameter names of the given function
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28 *
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29 * Params:
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30 * func = the function alias to get the parameter names of
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31 *
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32 * Returns: an array of strings containing the parameter names
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33 */
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34 template parameterNamesOf (alias func)
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35 {
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36 const parameterNamesOf = parameterNamesOfImpl!(func);
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37 }
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38
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39 private char[][] parameterNamesOfImpl (alias func) ()
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40 {
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41 char[] funcStr = typeof(&func).stringof;
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42
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43 auto start = funcStr.indexOf('(');
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44 auto end = funcStr.indexOf(')');
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45
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46 const firstPattern = ' ';
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47 const secondPattern = ',';
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48
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49 funcStr = funcStr[start + 1 .. end];
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50
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51 if (funcStr == "")
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52 return null;
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53
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54 funcStr ~= secondPattern;
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55
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56 char[] token;
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57 char[][] arr;
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58
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59 foreach (c ; funcStr)
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60 {
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61 if (c != firstPattern && c != secondPattern)
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62 token ~= c;
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63
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64 else
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65 {
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66 if (token)
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67 arr ~= token;
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68
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69 token = null;
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70 }
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71 }
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72
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73 char[][] result;
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74 bool skip = false;
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75
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76 foreach (str ; arr)
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77 {
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78 skip = !skip;
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79
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80 if (skip)
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81 continue;
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82
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83 result ~= str;
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84 }
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85
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86 return result;
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87 }
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88
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89 /**
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90 * Compile-time function to get the index of the give element.
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91 *
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92 * Performs a linear scan, returning the index of the first occurrence
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93 * of the specified element in the array, or U.max if the array does
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94 * not contain the element.
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95 *
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96 * Params:
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97 * arr = the array to get the index of the element from
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98 * element = the element to find
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99 *
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100 * Returns: the index of the element or size_t.max if the element was not found.
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101 */
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102 private size_t indexOf (T) (T[] arr, T element)
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103 {
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104 foreach (i, e ; arr)
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105 if (e == element)
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106 return i;
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107
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108 return size_t.max;
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109 } |
