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| 2 |
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| 3 | <head>
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| 4 | <meta http-equiv="Content-Language" content="en-us"></meta>
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| 5 | <title>MacroDef Task</title>
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| 6 | <link rel="stylesheet" type="text/css" href="../stylesheets/antmanual.css">
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| 7 | <style type="text/css">
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| 8 | <!--
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| 9 | .code { background: #EFEFEF; margin-top: }
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| 10 | -->
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| 11 | </style>
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| 12 | </head>
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| 13 |
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| 14 | <body>
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| 15 |
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| 16 | <h2><a name="macrodef">MacroDef</a></h2>
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| 17 | <h3>Description</h3>
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| 18 | <p>
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| 19 | This defines a new task using a <sequential>
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| 20 | nested task as a template. Nested elements <attribute> and
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| 21 | <element> are used to specify attributes and elements of
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| 22 | the new task. These get substituted into the <sequential>
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| 23 | task when the new task is run.
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| 24 | </p>
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| 25 | <h3>Note</h3>
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| 26 | <p>
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| 27 | You can also use <i>prior defined</i> attributes for default-values in
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| 28 | other attributes. See the examples.
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| 29 | </p>
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| 30 | <p>
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| 31 | <em>since Ant 1.6</em>
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| 32 | </p>
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| 33 | <h3>Parameters</h3>
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| 34 | <table border="1" cellpadding="2" cellspacing="0">
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| 35 | <tr>
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| 36 | <td valign="top"><b>Attribute</b></td>
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| 37 | <td valign="top"><b>Description</b></td>
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| 38 | <td align="center" valign="top"><b>Required</b></td>
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| 39 | </tr>
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| 40 | <tr>
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| 41 | <td valign="top">name</td>
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| 42 | <td valign="top">The name of the new definition</td>
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| 43 | <td valign="top" align="center">Yes</td>
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| 44 | </tr>
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| 45 | <tr>
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| 46 | <td valign="top">uri</td>
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| 47 | <td valign="top">
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| 48 | The uri that this definition should live in.
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| 49 | </td>
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| 50 | <td valign="top" align="center">No</td>
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| 51 | </tr>
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| 52 | </table>
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| 53 | <h3>Parameters specified as nested elements</h3>
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| 54 | <h4>attribute</h4>
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| 55 | <p>
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| 56 | This is used to specify attributes of the new task. The values
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| 57 | of the attributes get substituted into the templated task.
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| 58 | The attributes will be required attributes unless a default
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| 59 | value has been set.
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| 60 | </p>
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| 61 | <p>
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| 62 | This attribute is placed in the body of the templated
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| 63 | task using a notation similar to the ant property notation
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| 64 | - @{attribute name}. (May be remembered as "put the substitution
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| 65 | AT this location").
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| 66 | </p>
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| 67 | <p>
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| 68 | The escape sequence @@ is used to escape @. This allows @{x} to be
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| 69 | placed in the text without substitution of x by using @@{x}.
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| 70 | This corresponds to the $$ escape sequence for properties.
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| 71 | </p>
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| 72 | <p>
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| 73 | The case of the attribute is ignored, so @{myAttribute} is treated the
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| 74 | same as @{MyAttribute}.
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| 75 | </p>
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| 76 | <h3>Parameters</h3>
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| 77 | <table border="1" cellpadding="2" cellspacing="0">
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| 78 | <tr>
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| 79 | <td valign="top"><b>Attribute</b></td>
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| 80 | <td valign="top"><b>Description</b></td>
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| 81 | <td align="center" valign="top"><b>Required</b></td>
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| 82 | </tr>
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| 83 | <tr>
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| 84 | <td valign="top">name</td>
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| 85 | <td valign="top">The name of the new attribute</td>
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| 86 | <td valign="top" align="center">Yes</td>
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| 87 | </tr>
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| 88 | <tr>
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| 89 | <td valign="top">default</td>
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| 90 | <td valign="top">
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| 91 | The default value of the attribute.
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| 92 | </td>
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| 93 | <td valign="top" align="center">No</td>
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| 94 | </tr>
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| 95 | <tr>
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| 96 | <td valign="top">description</td>
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| 97 | <td valign="top">
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| 98 | This contains a description of the attribute.
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| 99 | <em>since ant 1.6.1</em>
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| 100 | </td>
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| 101 | <td valign="top" align="center">No</td>
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| 102 | </tr>
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| 103 | </table>
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| 104 | <h4>element</h4>
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| 105 | <p>
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| 106 | This is used to specify nested elements of the new task.
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| 107 | The contents of the nested elements of the task instance
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| 108 | are placed in the templated task at the tag name.
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| 109 | </p>
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| 110 | <p>
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| 111 | The case of the element name is ignored.
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| 112 | </p>
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| 113 | <h3>Parameters</h3>
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| 114 | <table border="1" cellpadding="2" cellspacing="0">
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| 115 | <tr>
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| 116 | <td valign="top"><b>Attribute</b></td>
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| 117 | <td valign="top"><b>Description</b></td>
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| 118 | <td align="center" valign="top"><b>Required</b></td>
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| 119 | </tr>
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| 120 | <tr>
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| 121 | <td valign="top">name</td>
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| 122 | <td valign="top">The name of the element</td>
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| 123 | <td valign="top" align="center">Yes</td>
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| 124 | </tr>
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| 125 | <tr>
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| 126 | <td valign="top">optional</td>
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| 127 | <td valign="top">
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| 128 | If true this nested element is optional. Default is
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| 129 | false - i.e the nested element is required in
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| 130 | the new task.
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| 131 | </td>
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| 132 | <td valign="top" align="center">No</td>
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| 133 | </tr>
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| 134 | <tr>
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| 135 | <td valign="top">implicit</td>
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| 136 | <td valign="top">
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| 137 | If true this nested element is implicit. This means that
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| 138 | any nested elements of the macrodef instance will be placed
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| 139 | in the element indicated by the name of this element.
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| 140 | There can only be one element if an element is implicit.
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| 141 | The default value is false. <em>since ant 1.6.2</em>
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| 142 | </td>
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| 143 | <td valign="top" align="center">No</td>
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| 144 | </tr>
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| 145 | <tr>
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| 146 | <td valign="top">description</td>
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| 147 | <td valign="top">
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| 148 | This contains a description
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| 149 | informing the user what the contents of the element are expected to be.
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| 150 | <em>since ant 1.6.1</em>
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| 151 | </td>
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| 152 | <td valign="top" align="center">No</td>
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| 153 | </tr>
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| 154 | </table>
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| 155 | <h4>text</h4>
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| 156 | <p>
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| 157 | This is used to specify the treatment of text contents of the macrodef.
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| 158 | If this element is not present, then any nested text in the macro
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| 159 | will be an error. If the text element is present, then the name
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| 160 | becomes an attribute that gets set to the nested text of the macro.
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| 161 | <em>Since ant 1.6.1.</em>
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| 162 | </p>
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| 163 | <p>
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| 164 | The case of the text name is ignored.
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| 165 | </p>
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| 166 | <h3>Parameters</h3>
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| 167 | <table border="1" cellpadding="2" cellspacing="0">
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| 168 | <tr>
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| 169 | <td valign="top"><b>Attribute</b></td>
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| 170 | <td valign="top"><b>Description</b></td>
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| 171 | <td align="center" valign="top"><b>Required</b></td>
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| 172 | </tr>
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| 173 | <tr>
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| 174 | <td valign="top">name</td>
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| 175 | <td valign="top">The name of the text attribute</td>
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| 176 | <td valign="top" align="center">Yes</td>
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| 177 | </tr>
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| 178 | <tr>
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| 179 | <td valign="top">optional</td>
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| 180 | <td valign="top">
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| 181 | If true nested text in the macro is optional, default is "false".
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| 182 | </td>
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| 183 | <td valign="top" align="center">No</td>
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| 184 | </tr>
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| 185 | <tr>
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| 186 | <td valign="top">trim</td>
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| 187 | <td valign="top">
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| 188 | If true, the nested text is trimmed of white space,
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| 189 | default is "false".
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| 190 | </td>
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| 191 | <td valign="top" align="center">No</td>
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| 192 | </tr>
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| 193 | <tr>
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| 194 | <td valign="top">description</td>
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| 195 | <td valign="top">
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| 196 | This contains a description
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| 197 | informing the user what the nested text of the macro is expected
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| 198 | to be.
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| 199 | </td>
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| 200 | <td valign="top" align="center">No</td>
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| 201 | </tr>
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| 202 | </table>
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| 203 |
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| 204 | <h3>Examples</h3>
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| 205 | <p>
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| 206 | The following example defined a task called testing and
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| 207 | runs it.
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| 208 | </p>
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| 209 | <blockquote>
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| 210 | <pre class=code>
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| 211 | <macrodef name="testing">
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| 212 | <attribute name="v" default="NOT SET"/>
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| 213 | <element name="some-tasks" optional="yes"/>
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| 214 | <sequential>
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| 215 | <echo>v is @{v}</echo>
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| 216 | <some-tasks/>
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| 217 | </sequential>
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| 218 | </macrodef>
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| 219 |
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| 220 | <testing v="This is v">
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| 221 | <some-tasks>
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| 222 | <echo>this is a test</echo>
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| 223 | </some-tasks>
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| 224 | </testing>
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| 225 | </pre>
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| 226 | </blockquote>
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| 227 | <p>
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| 228 | The following fragment defines a task called <call-cc> which
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| 229 | take the attributes "target", "link" and "target.dir" and the
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| 230 | nested element "cc-elements". The body of the task
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| 231 | uses the <cc> task from the
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| 232 | <a href="http://ant-contrib.sourceforge.net/">ant-contrib</a> project.
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| 233 | </p>
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| 234 | <blockquote>
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| 235 | <pre class="code">
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| 236 | <macrodef name="call-cc">
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| 237 | <attribute name="target"/>
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| 238 | <attribute name="link"/>
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| 239 | <attribute name="target.dir"/>
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| 240 | <element name="cc-elements"/>
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| 241 | <sequential>
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| 242 | <mkdir dir="${obj.dir}/@{target}"/>
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| 243 | <mkdir dir="@{target.dir}"/>
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| 244 | <cc link="@{link}" objdir="${obj.dir}/@{target}"
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| 245 | outfile="@{target.dir}/@{target}">
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| 246 | <compiler refid="compiler.options"/>
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| 247 | <cc-elements/>
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| 248 | </cc>
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| 249 | </sequential>
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| 250 | </macrodef>
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| 251 | </pre>
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| 252 | </blockquote>
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| 253 | <p>
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| 254 | This then can be used as follows:
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| 255 | </p>
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| 256 | <blockquote>
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| 257 | <pre class="code">
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| 258 | <call-cc target="unittests" link="executable"
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| 259 | target.dir="${build.bin.dir}">
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| 260 | <cc-elements>
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| 261 | <includepath location="${gen.dir}"/>
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| 262 | <includepath location="test"/>
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| 263 | <fileset dir="test/unittest" includes = "**/*.cpp"/>
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| 264 | <fileset dir="${gen.dir}" includes = "*.cpp"/>
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| 265 | <linker refid="linker-libs"/>
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| 266 | </cc-elements>
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| 267 | </call-cc>
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| 268 | </pre>
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| 269 | </blockquote>
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| 270 | <p>
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| 271 | The following fragment shows <call-cc>, but this time
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| 272 | using an implicit element and with the link and target.dir arguments
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| 273 | having default values.
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| 274 | </p>
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| 275 | <blockquote>
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| 276 | <pre class="code">
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| 277 | <macrodef name="call-cc">
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| 278 | <attribute name="target"/>
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| 279 | <attribute name="link" default="executable"/>
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| 280 | <attribute name="target.dir" default="${build.bin.dir}"/>
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| 281 | <element name="cc-elements" implicit="yes"/>
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| 282 | <sequential>
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| 283 | <mkdir dir="${obj.dir}/@{target}"/>
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| 284 | <mkdir dir="@{target.dir}"/>
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| 285 | <cc link="@{link}" objdir="${obj.dir}/@{target}"
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| 286 | outfile="@{target.dir}/@{target}">
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| 287 | <compiler refid="compiler.options"/>
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| 288 | <cc-elements/>
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| 289 | </cc>
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| 290 | </sequential>
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| 291 | </macrodef>
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| 292 | </pre>
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| 293 | </blockquote>
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| 294 | <p>
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| 295 | This then can be used as follows, note that <cc-elements>
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| 296 | is not specified.
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| 297 | </p>
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| 298 | <blockquote>
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| 299 | <pre class="code">
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| 300 | <call-cc target="unittests"/>
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| 301 | <includepath location="${gen.dir}"/>
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| 302 | <includepath location="test"/>
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| 303 | <fileset dir="test/unittest" includes = "**/*.cpp"/>
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| 304 | <fileset dir="${gen.dir}" includes = "*.cpp"/>
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| 305 | <linker refid="linker-libs"/>
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| 306 | </call-cc>
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| 307 | </pre>
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| 308 | </blockquote>
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| 309 | <p>
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| 310 | The following shows the use of the <code>text</code> element.
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| 311 | </p>
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| 312 | <blockquote>
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| 313 | <pre class="code">
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| 314 | <macrodef name="echotest">
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| 315 | <text name="text"/>
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| 316 | <sequential>
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| 317 | <echo>@{text}</echo>
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| 318 | </sequential>
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| 319 | </macrodef>
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| 320 | <echotest>
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| 321 | Hello world
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| 322 | </echotest>
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| 323 | </pre>
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| 324 | </blockquote>
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| 325 | <p>
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| 326 | The following uses a prior defined attribute for setting the
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| 327 | default value of another. The output would be
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| 328 | <tt>one=test two=test</tt>. If you change the order of lines
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| 329 | *1 and *2 the output would be <tt>one=test two=@{one}</tt>,
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| 330 | because while processing the <i>two</i>-line the value for
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| 331 | <i>one</i> is not set.
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| 332 | </p>
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| 333 | <blockquote>
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| 334 | <pre class="code">
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| 335 | <macrodef name="test"/>
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| 336 | <attribute name="one"/> <b>*1</b>
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| 337 | <attribute name="two" default="@{one}"/> <b>*2</b>
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| 338 | <sequential>
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| 339 | <echo>one=@{one} two=@{two}</echo>
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| 340 | </sequential>
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| 341 | </macrodef/>
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| 342 | <test one="test"/>
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| 343 | </pre>
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| 344 | </blockquote>
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| 345 | <hr>
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| 346 | <p align="center">Copyright © 2003-2004 The Apache Software
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| 347 | Foundation. All rights Reserved.</p>
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| 348 |
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| 349 | </body>
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| 350 | </html>
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