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annotate doc/misc/html/oldclasslib/array.html @ 2:4b08ee1ecb99
Adjust install notes to clarify that Wine applies only to the Windows build.
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author | David A. Holland |
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date | Sun, 26 Apr 2009 17:58:26 -0400 |
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> |
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2 <HTML> |
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3 <HEAD> |
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4 <TITLE>Array Storage Class Definition</TITLE> |
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5 </HEAD> |
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6 |
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7 |
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8 <BODY BGCOLOR="#ffffff" BACKGROUND="tilbl6h.gif" |
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9 TEXT="#000000" LINK="#0033CC" |
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10 VLINK="#CC0033" ALINK="#CC0099"> |
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11 |
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12 <P> |
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13 <IMG ALIGN="right" SRC="../images/agrsl6c.gif" ALT="AnaGram" |
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14 WIDTH=124 HEIGHT=30 > |
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15 <BR CLEAR="all"> |
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16 Back to : |
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17 <A HREF="../index.html">Index</A> | |
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18 <A HREF="index.html">Class libraries for examples</A> |
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19 <P> |
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20 |
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21 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------" |
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22 WIDTH=1010 HEIGHT=2 > |
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23 <P> |
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24 |
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25 <H1>Array Storage Class Definition</H1> |
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26 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------" |
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27 WIDTH=1010 HEIGHT=2 > |
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28 <P> |
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29 <BR> |
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30 <H2>Introduction</H2> |
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31 <P> |
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32 |
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33 <CODE>array<class T> </CODE> |
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34 is a template class that provides for storage |
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35 of arrays of any type. It takes care of allocating storage |
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36 and releasing it on function exit. It also checks all array |
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37 accesses for valid index values, providing protection against |
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38 out of bounds references. |
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39 <P> |
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40 <BR> |
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41 |
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42 <H2> Constructors </H2> |
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43 |
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44 There are two constructors: |
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45 <PRE> |
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46 array<class T>(unsigned n); |
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47 array<class T>(T *init_array, unsigned n); |
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48 </PRE> |
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49 The first constructor simply allocates an array of n elements |
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50 of type T and clears the array to zero. |
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51 <P> |
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52 The second constructor allocates an array of n elements of |
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53 type T and copies the contents of init_array to it. |
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54 <P> |
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55 Examples: |
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56 <PRE> |
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57 array<int> integers(300); |
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58 array<char> str("Hello, world", 13); |
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59 </PRE> |
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60 <P> |
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61 <BR> |
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62 |
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63 <H2> Data Access </H2> |
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64 |
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65 Two overloaded operators, the cast operator <CODE> (T *) </CODE> |
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66 and the subscript operator <CODE> []</CODE>, provide access to the |
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67 contents of the array. The cast operator provides a pointer to the |
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68 data in the array. The subscript operator provides a reference to a |
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69 particular element, which can be used either to read or to |
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70 write the element. Note that the use of cast operators is |
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71 often implicit rather than explicit. |
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72 <P> |
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73 For example, using the above declarations, one may write: |
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74 <PRE> |
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75 int k = integers[20]; |
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76 int *p = integers; // Implicit use of cast operator |
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77 char *sp = str; // Implicit use of cast operator |
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78 char c = str[5]; |
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79 str[6] = '!'; |
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80 </PRE> |
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81 The effect of these definitions is that for almost all |
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82 purposes you can use the array name exactly as though it were |
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83 a pointer to your data. |
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84 <P> |
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85 <BR> |
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86 |
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87 <H2> Size of the Array </H2> |
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88 |
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89 To find the length of a local array, use size(): |
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90 <PRE> |
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91 int n = size(integers); |
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92 </PRE> |
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93 <P> |
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94 <BR> |
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95 |
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96 |
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97 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------" |
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98 WIDTH=1010 HEIGHT=2 > |
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99 <P> |
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100 <IMG ALIGN="right" SRC="../images/pslrb6d.gif" ALT="Parsifal Software" |
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101 WIDTH=181 HEIGHT=25> |
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102 <BR CLEAR="right"> |
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103 |
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104 <P> |
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105 Back to : |
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106 <A HREF="../index.html">Index</A> | |
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107 <A HREF="index.html">Class libraries for examples</A> |
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108 <P> |
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109 |
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110 <ADDRESS><FONT SIZE="-1"> |
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111 AnaGram parser generator - examples<BR> |
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112 Array Storage Class Definition<BR> |
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113 Copyright © 1993-1999, Parsifal Software. <BR> |
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114 All Rights Reserved.<BR> |
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115 </FONT></ADDRESS> |
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116 |
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117 </BODY> |
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118 </HTML> |
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119 |